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Service bulletins for the 2018 Porsche Cayenne

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

718 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
122-C4M9S-092018-11-19. Service bulletin. SERVICE BRAKES, HYDRAULIC. Subject: Rear disc brake pads Symptom: If the vehicle is braked while driving at low speeds, a squealing noise can be heard shortly before the vehicle comes to a standstill. Cause: The disc brake pads can cause the squealing noise due to a change in the manufacturing process used by the supplier.
122-M4Q2P-092018-11-19. Service bulletin. ELECTRICAL SYSTEM. In the event of a complaint about low battery voltage in the vehicle electrical system and/or if the vehicle cannot be started or unlocked, the following instructionsmust be followed before doing any other work. Read out the hardware version fromthe instrument cluster and life cycle data from the gateway as described below (under 'Conditions'): ? If the hardware version that is read out = "011" and the life cycle data value is "20" at least once, ? aVehicle Analysis Log (VAL) must be created and attached to the PQIS claim and ? the work described under 'Action required' must be carried out.
122-N8X6K-102018-10-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Complaint - PCM 5.0 Integrated System: Repair instructions (132/18)
122-E3W4E-102018-10-15. Service bulletin. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT. Symptom: The yellow warning message "Rear differential lock failure Adapted driving permitted" can appear in the instrument cluster. Cause: The yellow warning message can appear in the instrument cluster due to defective control unit software.
122-X8H9Y-082018-08-20. Service bulletin. SERVICE BRAKES, HYDRAULIC. Subject: Connecting-rod bearing Situation: At high engine speeds and with the high lateral acceleration forces that occur when driving on race tracks, the oil pressure can drop if the engine-oil level is low. In this case, the connecting rod bearings in the engine can be damaged due to insufficient lubrication.
122-B9L7S-072018-08-06. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Subject: Control unit for rear-end electronics Symptom: The alarm system is triggered spontaneously (for no apparent reason). Cause: The mobile phone antenna (GSM) signals can be picked up by the interior surveillance system and result in spontaneous triggering of the alarm system.
122-R9H5B-072018-08-06. Service bulletin. ENGINE; EQUIPMENT ADAPTIVE/MOBILITY. Concerns: Belt tensioner Information: Checking belt tensioner in the event of a complaint about "leaks" before carrying out any other work.
122-P5G7U-072018-08-06. Service bulletin. ELECTRICAL SYSTEM:WIRING; ENGINE. Oil in the wiring harness. If oil is found in the engine wiring harness during a repair, the wiring harness and all the affected components (including the oil pump control valve) must be replaced.
122-B9L7S-072018-07-30. Service bulletin. ELECTRICAL SYSTEM. Subject: Control unit for rear-end electronics Symptom: The alarm system is triggered spontaneously (for no apparent reason). Cause: The mobile phone antenna (GSM) signals can be picked up by the interior surveillance system and result in spontaneous triggering of the alarm system.
122-R9H5B-072018-07-30. Service bulletin. ENGINE. Concerns: Belt tensioner Information: Checking belt tensioner in the event of a complaint about "leaks" before carrying out any other work.
122-P5G7U-072018-07-30. Service bulletin. FUEL SYSTEM, GASOLINE. Oil in the wiring harness. If oil is found in the engine wiring harness during a repair, the wiring harness and all the affected components (including the oil pump control valve) must be replaced.
122-B9V4V-062018-06-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information: The Approval and Support Management system was created to offer assistance to the dealer organization with new and complex technical issues by utilizing the Support Specialists within Porsche R&D. As a result, this process has reduced vehicle downtime and repeat repairs substantially.
122-K8M7U-052018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; EQUIPMENT. Subject: Cayenne S (9YA) As of 2018 Front exhaust pipes Symptom: Buzzing/vibrating noises in the exhaust system area at an engine speed of approx. 1,100 rpm during deceleration. Cause: The exhaust system can expand in an unfavorable direction and become strained at operating temperature. Remedial Action: Loosen clamps on the exhaust system, bring the exhaust system to operating temperature and re-position the clamps.
122-F4U4P-042018-04-23. Service bulletin. ELECTRICAL SYSTEM. Model Line: Cayenne (92A) Macan (95B) Concerns: AGM starter battery (referred to below simply as ?battery?) Situation: Customer complaints concerning battery-related topics Recurring customer complaints concerning topics relating to battery capacity and quality.
122-A5L9U-042018-04-23. Service bulletin. FUEL SYSTEM, GASOLINE. Information: Analysis has shown that traces of oil found in the hydraulic pump or tandempump area are not always caused by a Pentosin leak in the pump. In the event of a complaint about traces of oil in the hydraulic pump or tandem pump area,
122-F6P9L-042018-04-23. Service bulletin. WHEELS. General information: This bulletin contains information about ? technically permissible wheel/tire combinations, ? measures that may be required when changing the wheel/tire combination installed at the factory, ? approved original Porsche alloy wheels and ? approved summer, all-season and winter tires and their tire pressures.
122-B6P3D-032018-03-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. Symptom: Hard or jerky gear changes. Cause: This is caused by the transition phase when changing from the engaged gear to the target gear. Various components of the powertrain affect the shifting quality. Remedial Action: In the event of a customer complaint, use PIWIS Tester III with software 36.400.020 (or higher) installed to: ? re-program and code the Tiptronic control unit via "Automatic programming" and ? reset the adaptation values.
122-A6Z3V-032018-03-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). Subject: Intake valves and intake ports Information: Carboned-up valves in the engine can be reworked and cleaned using cleaning equipment. If there is a complaint about knocking combustion, e.g. during acceleration at high load, the condition of the intake valves and portsmust be checked before doing any other work. If the check shows that the intake valves and intake ports have carbon deposits and are dirty, they must be cleaned using the VAS 294 011 - cleaning unit. There should be no need to replace the components. Date of Introduction: The VAS 294 011 - cleaning unit can be ordered immediately for dealers. Remedial Action: The VAS 294 011 - cleaning unit is used for cleaning carboned-up intake valves and intake ports. Compressed air is used to spray a special granulatemixture into the intake port,where it loosens and removes carbon build-up. The dirty granulate is extracted during spraying using an industrial vacuum cleaner.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.