Lexus ES350 Key Replacement Austin TX - (512)523-4550

If you need a Lexus ES 350 key replacement in Austin, Austin Car Key provides mobile service for lost keys, duplicate Smart Keys, key-fob programming, emergency-key cutting, ignition and starting problems, and vehicle lockouts. The Lexus ES 350 joined the U.S. ES lineup for the 2007 model year and has used electronic engine-immobilizer technology throughout its production. Depending on model year and equipment, the ES 350 can use a conventional physical transponder key or a Lexus SmartAccess electronic key with push-button start. Because similar-looking Lexus keys can contain different electronics, the exact vehicle should be identified before a replacement is cut or programmed. Our automotive locksmith can provide Lexus ES 350 key replacement at your location in Austin.

Lexus ES 350 Key Replacement Guide

The Lexus ES 350 was introduced for the 2007 model year as the V6-powered successor to the ES 330. Since then, the ES 350 has progressed through several generations of Lexus electronic-key technology. Earlier vehicles can use conventional physical transponder keys or SmartAccess depending on configuration, while later ES 350 models are strongly associated with Lexus SmartAccess and push-button start.

For key replacement, the important distinction is whether the vehicle has a conventional ignition cylinder or an electronic engine switch. A physical-key ES 350 requires mechanical blade cutting and transponder registration, while a SmartAccess vehicle requires a compatible electronic key registered to the vehicle.

2007–2009 Lexus ES 350 Keys

The 2007–2009 ES 350 uses an electronic engine immobilizer. Depending on configuration, the vehicle can use a conventional physical electronic key or Lexus SmartAccess with push-button start.

On a physical-key vehicle, the mechanical blade operates the ignition while an electronic transponder credential provides engine authorization. On a SmartAccess-equipped ES 350, a registered electronic key is detected by the vehicle and normal starting is performed with the engine switch.

The actual ignition configuration should be confirmed before selecting a replacement.

2010–2012 Lexus ES 350 Keys

The updated 2010–2012 ES 350 continues to use Lexus electronic immobilizer technology, with SmartAccess and push-button-start configurations available during this generation.

A SmartAccess electronic key performs proximity entry and starting authorization without requiring the driver to insert a conventional blade into the ignition.

Similar-looking Lexus electronic keys should not be assumed interchangeable because the internal electronics and vehicle application can differ.

2013–2015 Lexus ES 350 Keys

The redesigned ES 350 arrived for the 2013 model year with Lexus SmartAccess electronic-key technology and push-button starting.

The electronic key communicates with antennas and control modules in the vehicle. When a registered credential is detected and the required starting conditions are satisfied, the engine can be started using the engine switch.

A removable mechanical emergency blade is incorporated into the electronic key for backup physical access.

2016–2018 Lexus ES 350 Keys

The 2016–2018 ES 350 continues with the same general SmartAccess and push-button-start architecture.

Replacement requires a compatible electronic key that can be registered to the vehicle's immobilizer and SmartAccess system. The mechanical emergency blade is cut separately.

Exact electronic-key specifications should be matched to the vehicle rather than selected solely from the appearance of the key housing.

2019–2021 Lexus ES 350 Keys

A new generation of the Lexus ES arrived for 2019. The ES 350 uses modern Lexus SmartAccess technology with push-button start and an electronic engine immobilizer.

The electronic key provides the credential required for normal access and starting. Its removable emergency blade provides backup mechanical access but does not replace the electronic starting credential.

Electronic compatibility should be confirmed before programming because keys from earlier ES generations are not automatically interchangeable.

2022 & Newer Lexus ES 350 Keys

Current ES 350 models continue to use Lexus SmartAccess with push-button start and electronic engine-immobilizer technology.

A registered electronic key is required for normal starting authorization. The key also incorporates a mechanical emergency blade for situations in which electronic door unlocking is unavailable.

Exact key application can change during a vehicle generation, so model year and electronic specifications should still be verified before replacement.

Lexus ES 350 Transponder Key

A conventional physical-key ES 350 uses an electronic transponder key as part of the engine immobilizer.

The mechanical blade operates the ignition while the transponder inside the key supplies the electronic credential required for engine authorization.

A correctly cut blade can mechanically turn an applicable ignition while an incorrect or unregistered transponder prevents normal starting.

Lexus ES 350 SmartAccess Key

SmartAccess-equipped ES 350 models use an electronic proximity key fob rather than requiring the driver to insert a conventional ignition key.

When the vehicle detects an authorized electronic key and the required starting conditions are met, the driver can start the engine with the push-button engine switch.

A replacement SmartAccess key must be electronically compatible with the exact ES 350 and registered to the vehicle.

ES 350 Smart Key Emergency Blade

The Lexus ES 350 electronic key contains a removable mechanical emergency blade.

The emergency blade provides backup physical access to the vehicle. It does not by itself supply the electronic credential needed to start a push-button-start ES 350.

Mechanical blade cutting and electronic-key registration are therefore separate parts of a complete replacement.

ES 350 Smart Key Backup Recognition

If the battery inside an already registered ES 350 electronic key becomes too weak for normal wireless detection, applicable Lexus systems provide a close-range backup recognition method.

The registered electronic key can be presented close to the engine switch according to the procedure for the applicable model year while the normal starting conditions are satisfied.

If close-range recognition works while normal proximity operation does not, the key-fob battery is an important first item to check.

ES 350 Engine Immobilizer

The Lexus ES 350 engine immobilizer prevents normal starting unless an authorized electronic credential is recognized.

On a conventional physical-key configuration, the credential is contained in the transponder chip. On a SmartAccess vehicle, starting authorization is integrated into the electronic-key system.

An immobilizer-related no-start does not automatically mean the vehicle's ECU needs replacement. The key, reader or SmartAccess antennas, immobilizer components, wiring, communication, and vehicle voltage should be diagnosed first.

ES 350 Security Indicator

The security indicator can provide useful information about the state of the Lexus engine immobilizer.

Unexpected indicator behavior can suggest that the expected electronic credential is not being recognized, but the light alone does not identify which component has failed.

The electronic key, vehicle-side antennas or reader, immobilizer electronics, wiring, communication, and electrical condition should be considered together.

ES 350 Remote and Immobilizer Functions

Remote locking functions and engine-start authorization should be understood as separate electronic functions even though both are incorporated into the same Lexus key.

A key can sometimes operate its remote buttons while an immobilizer-related problem prevents starting. Conversely, an authorized credential can remain valid while remote-button operation is affected by a weak battery or damaged buttons.

Both functions should be tested independently during diagnosis.

ES 350 High-Security Emergency Key

The mechanical blade associated with later ES 350 electronic keys uses a high-security design.

High-security or laser-cut describes the mechanical blade; it does not describe the electronic immobilizer credential.

Cutting the emergency blade therefore does not program the electronic key.

ES 350 vs. ES 300h Keys

The ES 350 and ES 300h share the Lexus ES platform and can use similar electronic-key technology, but their keys should not automatically be assumed interchangeable.

Exact electronic specifications, model year, button configuration, emergency blade, and registration requirements should be verified.

A key should be selected for the specific vehicle rather than simply because it resembles another ES key.

ES 350 vs. Toyota Camry Keys

The Lexus ES and Toyota Camry have shared related Toyota/Lexus technology, but this does not make their keys interchangeable.

Lexus SmartAccess keys, Toyota Smart Keys, physical transponder keys, mechanical blades, and electronic applications can differ even when the underlying security concepts are related.

A Camry key should not be assumed compatible with an ES 350.

ES 350 vs. Lexus RX Keys

The Lexus ES 350 and RX can use similar-looking Lexus electronic keys.

Visual similarity does not establish compatibility. Different model years and platforms can use different electronics, button configurations, emergency blades, and registration applications.

The exact electronic key should be verified before programming.

Similar-Looking Lexus ES 350 Keys

Lexus has used several electronic-key housings that appear nearly identical across different models and years.

Two keys can have the same general shape while containing different internal electronics or being intended for different SmartAccess systems.

Appearance alone should not be used to select a replacement.

Used Lexus ES 350 Smart Keys

A used ES 350 electronic key should be checked before programming is attempted.

Exact application, previous registration, electronic condition, and applicable reuse requirements can affect whether a used key is suitable for another vehicle.

Compatibility should preferably be established before permanently cutting its emergency blade.

Aftermarket Lexus ES 350 Keys

An aftermarket electronic key can be a practical replacement when its specifications match the exact ES 350.

Not every key advertised broadly for Lexus vehicles is compatible with every ES 350 year or SmartAccess system.

A customer-supplied key should therefore be verified before cutting or Lexus ES 350 key programming is attempted.

Physical ES 350 Key Blade Wear

On an ES 350 equipped with a conventional inserted ignition key, years of use can wear the mechanical blade.

If a less-used spare turns substantially better than the everyday key, the primary blade may be worn. Producing a fresh key to proper specifications can sometimes restore smoother operation.

Directly tracing a heavily worn blade can reproduce its worn dimensions rather than restoring the intended cuts.

Physical ES 350 Ignition Cylinder Wear

A conventional physical-key ES 350 can also develop mechanical ignition-cylinder wear.

If several accurately cut keys bind or require jiggling in the same ignition, the cylinder becomes a stronger suspect than the individual key.

An ignition locksmith can inspect an applicable mechanical ignition before unnecessary additional keys are made.

Lost Lexus ES 350 Key Replacement

If you've lost your car keys and no working Lexus ES 350 key remains, a replacement can still be made.

On a conventional physical-key ES 350, all-keys-lost service requires a mechanically correct blade and an authorized transponder credential.

On a SmartAccess ES 350, a compatible electronic key must be registered to the vehicle. Its mechanical emergency blade can be originated and cut separately.

An all keys lost situation is different from adding another electronic key while a recognized credential remains. Depending on the electronic-key generation, an immobilizer or SmartAccess reset procedure may be required before replacement credentials can be established.

Your vehicle's VIN can help identify the exact ES 350 and applicable original key information. Proof of ownership and identification should be available before all-keys-lost service is performed.

If an electronic key was lost or stolen, ask whether the missing credential can be removed from authorized memory when supported by the applicable procedure.

Duplicate & Spare Lexus ES 350 Keys

If you still have a reliable working ES 350 key, making a duplicate car key can help prevent a more complicated all-keys-lost situation.

For a conventional physical-key ES 350, a complete spare requires a correctly cut blade and compatible registered transponder credential.

For a SmartAccess-equipped ES 350, the replacement electronic key must match the vehicle's system and be registered. Its removable emergency blade can be cut separately.

A spare electronic key should be tested independently after registration rather than assuming successful programming from remote-button operation alone.

After replacement, test all applicable functions, including mechanical access, remote locking and unlocking, passive entry, electronic-key detection, and push-button starting.

Lexus ES 350 Key Programming

Lexus ES 350 key programming depends on the model year, ignition configuration, electronic-key generation, and whether a recognized working credential remains.

Physical-key vehicles require transponder registration, while SmartAccess-equipped vehicles require electronic-key registration appropriate to the proximity-key system.

ES 350 Transponder Key Programming

On a conventional physical-key ES 350, a compatible transponder credential must be registered with the engine immobilizer.

Mechanical cutting and electronic registration are separate operations. A blade can mechanically operate the ignition while an incorrect or unauthorized transponder prevents normal starting.

After programming, the replacement should be tested independently by starting the vehicle.

Adding Another ES 350 Electronic Key

When a recognized working credential remains, another compatible electronic key can be added using the registration procedure appropriate to that ES 350.

The replacement should first be verified for exact electronic compatibility.

Making a spare while a working key remains can simplify future replacement if another key is later lost.

ES 350 All Keys Lost Programming

If every recognized ES 350 key has been lost, the normal additional-key registration procedure no longer applies.

The applicable immobilizer or SmartAccess reset procedure must be used to establish replacement credentials.

The correct procedure should be selected for the exact model year and electronic-key architecture.

ES 350 Immobilizer Reset

Lexus electronic security systems provide diagnostic functions for key registration, key erasure, and recovery from an all-keys-lost condition.

The exact reset process depends on the generation of the immobilizer and SmartAccess system.

A procedure intended for an earlier physical transponder-key vehicle should not automatically be applied to a later proximity-key system.

ES 350 SmartAccess Key Programming

A push-button-start ES 350 requires electronic registration of a compatible SmartAccess key.

The replacement must match the vehicle's electronic-key system. A similar-looking Lexus key is not necessarily compatible.

After registration, remote buttons, passive-entry functions, electronic-key detection, and push-button starting should be tested as applicable.

ES 350 Emergency Blade Cutting

The removable mechanical blade inside a Lexus electronic key is cut separately from SmartAccess programming.

Online car key cutting or another mechanical cutting service can address the emergency blade when the correct information is available, but cutting the blade does not register the electronic key.

A complete replacement should address both functions when required.

ES 350 Lost-Key Erasure

If an ES 350 electronic key was lost or stolen, ask whether the missing credential can be removed from authorized memory when supported by the applicable system and procedure.

This is different from simply adding another electronic key.

Keys intended for continued use should be available during service when required.

ES 350 Programming Failure

An ES 350 key that will not program does not automatically mean an expensive control module needs replacement.

An incorrect key application, incompatible electronics, damaged transmitter, transponder reader or SmartAccess antenna problem, low vehicle voltage, wiring fault, or communication issue can interfere with registration.

The electronic key and vehicle-side security system should be diagnosed before the ECU or other modules are replaced.

Lexus ES 350 Key, Remote/Fob & Starting Problems

A Lexus ES 350 that will not unlock or start does not automatically need another key. Electronic-key recognition, remote electronics, low vehicle voltage, SmartAccess antennas, wiring faults, mechanical wear on physical-key vehicles, and unrelated starting-system problems can produce similar symptoms.

ES 350 Key Turns but Engine Will Not Start

On a conventional physical-key ES 350, the blade can mechanically turn the ignition while the transponder credential is not recognized.

An incorrect, damaged, or unregistered transponder is one possibility, but vehicle voltage, immobilizer components, wiring, starter, fuel, and engine-management faults can also cause a no-start.

If another registered key starts the vehicle normally, the first key becomes a stronger suspect.

ES 350 Security Indicator Keeps Flashing

The security indicator can provide useful information when diagnosing an immobilizer or SmartAccess problem.

Unexpected behavior can suggest that the expected electronic credential is not being recognized, but the indicator alone does not identify the failed component.

The key, vehicle-side antennas or reader, electronic modules, wiring, communication, and electrical condition should be considered together.

ES 350 Remote Works but Engine Will Not Start

Remote operation and engine-start authorization are separate functions.

An electronic key can successfully lock and unlock the ES 350 while an immobilizer-related problem prevents starting. Vehicle battery, starter, engine-management, and other faults can also produce a no-start.

A working remote therefore does not prove that the complete starting system is functioning normally.

ES 350 Starts but Remote Buttons Do Not Work

If the ES 350 starts normally but the remote buttons fail, its starting credential can still be valid.

A weak key battery, worn buttons, damaged electronics, poor battery contacts, wireless-function problems, or a vehicle-side receiver issue can affect remote operation separately.

The remote portion should therefore be diagnosed independently.

ES 350 Smart Key Is Not Detected

A weak electronic-key battery can reduce detection range or prevent normal SmartAccess operation.

A damaged key, electronic interference, SmartAccess antenna or receiver problem, low vehicle voltage, wiring fault, or another electronic issue can create similar symptoms.

If another registered electronic key works normally, the first key becomes a stronger suspect.

ES 350 Key-Fob Battery Is Weak

A weak key battery can cause reduced remote range, intermittent passive entry, or difficulty with normal electronic-key detection.

Replacing the correct battery does not normally erase a properly registered Lexus electronic key.

If a fresh battery does not restore normal operation, the key and vehicle-side SmartAccess system should be checked.

ES 350 Starts With Close-Range Key Recognition

If the ES 350 recognizes its electronic key only when it is presented close to the engine switch, a weak key battery is an important first possibility.

The backup method allows an already registered credential to be recognized when normal wireless operation is unavailable.

If replacing the key battery does not restore normal proximity operation, the electronic key and SmartAccess system should be diagnosed.

ES 350 Push-Button Start Does Not Work

If a SmartAccess-equipped ES 350 does not start, determine whether the vehicle recognizes an authorized electronic key and has adequate 12-volt power.

Brake input, electronic-key detection, vehicle voltage, immobilizer communication, starting controls, and unrelated vehicle faults can all affect operation.

A non-responsive engine switch does not automatically mean the electronic key needs replacement.

ES 350 Vehicle Battery Is Weak

Low 12-volt vehicle voltage can cause SmartAccess, immobilizer, and starting symptoms that initially appear to be key related.

Electronic-key antennas, security modules, control units, and starting electronics require adequate power to operate normally.

If multiple previously working keys suddenly produce identical symptoms, checking the vehicle battery and electrical condition is an important diagnostic step.

Physical ES 350 Key Is Hard to Turn

On an applicable physical-key ES 350, a worn, bent, damaged, or poorly cut blade can become difficult to turn.

If a less-used spare works substantially better, blade wear becomes more likely. If several accurately cut keys bind in the same ignition, the cylinder becomes a stronger suspect.

Continuing to force a binding key can eventually bend or break the blade.

Broken Lexus ES 350 Key

On a physical-key ES 350, a mechanical blade can break because of wear, repeated bending, physical damage, or excessive force against a binding ignition.

If part of the blade remains inside the ignition or door lock, professional extraction can often remove it without unnecessarily replacing the complete cylinder.

On SmartAccess vehicles, a damaged emergency blade can likewise be replaced separately from the electronic key when the transmitter itself remains functional.

Lexus ES 350 Lockout Service

If your Lexus ES 350 key is locked inside the vehicle, replacement may not be necessary. Austin Car Key provides car door unlocking to regain access and retrieve the existing key.

Professional vehicle entry helps avoid unnecessary damage to the glass, paint, weather stripping, door trim, mechanical locks, and electronic locking components.

A lockout should be distinguished from an all keys lost situation. If a functioning ES 350 key is simply inaccessible inside the vehicle, retrieving it can avoid unnecessary key replacement and programming.

If the recovered electronic key is your only reliable working credential, making a complete spare afterward can reduce the risk of a more complicated future replacement.

Dealer vs. Locksmith

A Lexus dealer can provide OEM replacement transponder keys, SmartAccess electronic keys, emergency blades, and related electronic-key service for the ES 350.

A properly equipped mobile automotive locksmith may be able to originate lost ES 350 keys, duplicate transponder keys, register compatible SmartAccess keys, cut emergency blades, extract broken keys, diagnose applicable mechanical ignition problems, and unlock the vehicle at its location.

Correct identification is particularly important because the ES 350 spans earlier physical electronic-key configurations and multiple generations of Lexus SmartAccess technology.

Mobile service can avoid vehicle transport when the required cutting, programming, reset, and diagnostic work can be completed at the vehicle.

For information on locating a Lexus service facility or parts source, use our find a dealer resource.

Lexus ES 350 Key Replacement Cost in Austin

The cost of Lexus ES 350 key replacement depends on the model year, ignition configuration, electronic-key generation, replacement type, and whether a recognized working key remains.

All prices are estimates. Final pricing depends on the exact model year and key system, whether a recognized key remains, replacement-key electronics, programming or reset requirements, emergency-blade cutting, parts availability, and the condition of the applicable locks and ignition components. A technician can provide a final quote before beginning service.

Common Questions & Answers

What type of key does a Lexus ES 350 use?

Depending on model year and equipment, the ES 350 can use a conventional physical transponder key or a Lexus SmartAccess electronic key with push-button start. Later ES 350 generations use SmartAccess technology.

What year did the Lexus ES 350 come out?

The Lexus ES 350 was introduced in the United States for the 2007 model year, replacing the ES 330 as the V6 ES model.

Does a Lexus ES 350 have an immobilizer?

Yes. The ES 350 uses an electronic engine immobilizer that requires an authorized electronic credential for normal starting.

Does a Lexus ES 350 have a transponder key?

Conventional physical-key ES 350 applications use a transponder credential. SmartAccess-equipped vehicles also use electronic immobilizer credentials, but normal starting is performed through the proximity-key and push-button-start system.

Does every Lexus ES 350 have push-button start?

Key configuration varies on earlier ES 350 models. Later generations use Lexus SmartAccess with push-button start.

Does a Lexus ES 350 Smart Key have a mechanical key?

Yes. The electronic key contains a removable emergency blade for backup physical access.

Can the ES 350 emergency blade start the vehicle?

Not by itself on a push-button-start ES 350. The blade provides mechanical access, while the electronic key supplies the credential required for starting authorization.

Can an ES 350 start with a weak key-fob battery?

Applicable Lexus SmartAccess systems provide close-range backup recognition for an already registered electronic key when its battery is too weak for normal wireless operation.

Does a Lexus ES 350 key need programming?

Yes, when the vehicle uses an electronic immobilizer credential. A physical transponder key or SmartAccess electronic key must be registered appropriately to the vehicle.

Can you make a Lexus ES 350 key if all keys are lost?

Yes. Depending on the model year, service can involve mechanical blade origination, transponder registration and an applicable immobilizer reset, or SmartAccess electronic-key registration.

Can a lost Lexus ES 350 key be erased?

If an electronic key was lost or stolen, ask whether the missing credential can be removed from authorized memory when supported by the applicable system and procedure.

Can a Lexus ES 350 key be made from the VIN?

The VIN can help identify the exact vehicle and applicable original key information. If mechanical lock hardware has previously been replaced, it may no longer match the original key configuration.

Can I order a Lexus ES 350 emergency key cut online?

Online car key cutting can address the mechanical emergency blade when the correct information is available. Electronic-key registration remains a separate process.

Is an ES 350 remote the same as the immobilizer credential?

No. Remote-button operation and engine-start authorization are separate functions even though both are incorporated into the same electronic key.

Is a Lexus ES 350 key the same as an ES 300h key?

Not automatically. The vehicles can use similar Lexus electronic-key technology, but exact electronics, model year, button configuration, and registration application must be verified.

Is a Lexus ES 350 key the same as a Toyota Camry key?

No assumption of interchangeability should be made. Lexus and Toyota use related security technology, but the actual electronic keys, blades, and applications can differ.

Is a Lexus ES 350 key the same as a Lexus RX key?

Not automatically. Similar-looking Lexus electronic keys can contain different electronics and be intended for different vehicle platforms or model years.

Can I use a used Lexus ES 350 Smart Key?

A used electronic key should be checked for exact compatibility, previous registration, electronic condition, and applicable reuse requirements before programming is attempted.

Can I use an aftermarket Lexus ES 350 key?

An aftermarket replacement can be an option when its mechanical and electronic specifications match the exact ES 350 application.

Why does my ES 350 remote work but the engine will not start?

Remote operation and engine authorization are separate functions. A working remote does not prove that the immobilizer credential or complete starting system is functioning normally.

Why does my ES 350 start but the remote buttons do not work?

A weak key battery, worn buttons, damaged electronics, poor battery contacts, or a vehicle-side wireless problem can affect remote operation while the starting credential remains valid.

Will changing my Lexus ES 350 key battery erase its programming?

Normally, no. Replacing the battery does not erase a properly registered Lexus electronic key.

Why is my Lexus ES 350 Smart Key not detected?

A weak key battery, damaged electronic key, interference, low vehicle voltage, SmartAccess antenna or receiver problems, wiring faults, or another vehicle-side issue can interfere with detection.

Why does my ES 350 start only when I hold the key near the start button?

The key battery may be too weak for normal wireless detection while close-range backup recognition still works. If a fresh battery does not restore normal operation, the electronic key and SmartAccess system should be checked.

Why won't my Lexus ES 350 start when the key is inside?

The vehicle may not be recognizing the electronic key, but low 12-volt power, brake-input problems, starting-system faults, wiring issues, or other vehicle conditions can produce the same symptom.

Can you unlock my Lexus ES 350 if the key is inside?

Yes. If a functioning electronic key is simply locked inside the vehicle, professional vehicle unlocking can regain access without unnecessarily making and programming another key.

Lexus ES 350 Key Replacement in Austin

The Lexus ES 350 has used electronic engine-immobilizer technology since its 2007 introduction. Earlier vehicles can use conventional physical transponder-key or SmartAccess configurations depending on equipment, while later ES 350 generations use Lexus SmartAccess electronic keys with push-button start.

Correct vehicle identification is essential because similar-looking Lexus electronic keys are not necessarily compatible. Model year, ignition configuration, electronic-key generation, mechanical emergency blade, and transmitter application should all be established before a replacement is cut or programmed.

If you still have a reliable working ES 350 key, making a spare now can help prevent a more complicated all keys lost situation. If every key is already missing, a replacement can still be provided and the applicable immobilizer or SmartAccess procedure performed.

For Lexus ES 350 key replacement, duplicate Smart Keys, lost-key service, key programming, emergency-blade cutting, starting problems, broken-key extraction on applicable vehicles, or vehicle unlocking in Austin, contact Austin Car Key for mobile service at your location.

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