AMB1 – Replacing Engine (Stop Delivery/Recall Campaign) – 2021 Porsche Cayenne

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May 12, 2021 NHTSA CAMPAIGN NUMBER: 21V341000

Engine Cylinder Bore Surface May Develop Cracks

Cracks may cause engine damage and a stall or an oil leak, increasing the risk of a crash or fire.


NHTSA Campaign Number: 21V341

Manufacturer Porsche Cars North America, Inc.

Components ENGINE

Potential Number of Units Affected 12



Porsche Cars North America, Inc. (Porsche) is recalling certain 2021 Cayenne Turbo, Cayenne GTS, and Cayenne GTS Coupe vehicles. Cracks may develop on the surface of the engine cylinder bore.



Dealers will replace the engine, free of charge. Owner notification letters were mailed July 9, 2021. Owners may contact Porsche customer service at 1-800-767-7243. Porsche’s number for this recall is AMB1.



Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to


Check if your Porsche has a Recall


AMB1 – Replacing Engine (Stop Delivery/Recall Campaign)


Vehicle Type:

Cayenne GTS (9YA) / Cayenne GTS Coupé (9YB)

Cayenne Turbo (9YA)


Model Year:




Cracking in the cylinder liners



There is a possibility that cracking has occurred in the cylinder liners on the affected vehicles due to a process error during the casting of the engine block.

Over time, the cracks may widen due to the load during engine operation, causing damage to the cylinder wall and the piston.


Action required:

  • Replacing engine
  • Replace vehicle-specific stickers showing the allocation of vehicle identification number to engine number
  • Vehicles with M-no. 6GK – (widened wheel arch in vehicle color), replace wheel arch trims on the rear axle


Affected Vehicles:

Only vehicles assigned to the campaign (see also PCSS Vehicle Information). This campaign affects 12 vehicles.


This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. Porsche has decided that a defect that relates to motor vehicle safety exists in certain 2021 Model Year Porsche Cayenne GTS, Cayenne GTS Coupe and Cayenne Turbo vehicles. Our records show that you are the current owner of a vehicle affected by this recall.


What is the issue?

In some of the affected vehicles, the engine block may have been manufactured out of specification. If this occurs on your vehicle, severe engine damage, including potential for sudden loss of power, which increases the risk of a crash, or fire could occur. Until your vehicle is remedied, please follow instructions to the right.


What will Porsche do?

Porsche is conducting a Safety Recall to replace the engine in your vehicle free of charge.


What should you do?

Please contact any authorized Porsche dealer to schedule an appointment to have this Recall performed as soon as possible, and to arrange for alternate transportation, if requested.

To find your nearest authorized Porsche dealer, visit:

If in the meantime you hear unusual noises coming from the engine compartment or the oil pressure warning in the instrument cluster illuminates, please immediately park your vehicle and contact Porsche Customer Support or your authorized Porsche dealer by phone.

If you require further assistance, you may contact us at 1-800-PORSCHE or email


This is an important Safety Recall.

The remedy will take up to 2 business days to perform, however depending on the dealer’s work schedule, it may be necessary to make your vehicle available for a longer period of time.


1 Affected Product




7 Associated Documents

Manufacturer Notices(to Dealers,etc) – AMB1 Stop delivery / Recall campaign – Replacing engine

RCMN-21V341-9203.pdf 137.455KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-21V341-5048.pdf 256.7KB

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Recall Acknowledgement

RCAK-21V341-9244.pdf 645.126KB

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Defect Notice 573 Report

RCLRPT-21V341-6764.PDF 215.904KB

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Recall Quarterly Report #1, 2021-3

RCLQRT-21V341-2672.PDF 211.15KB

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Remedy Instructions and TSB

RCRIT-21V341-5479.pdf 557.503KB

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Recall Quarterly Report #2, 2021-4

RCLQRT-21V341-8038.PDF 211.245KB

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