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What 40 owners told NHTSA about the 2019 Porsche Cayenne S

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (40)Crash / fire / injury (1)Airbags (11)Electrical system (10)Transmission & drivetrain (6)Brakes (5)Engine (5)Lights (5)Speed control (4)Driver assistance (3)Backup camera & sensors (2)Lane Departure (2)

3 of 40 complaints match · Driver assistance · clear filters

Apr 28, 2022Electrical systemDriver assistanceLane Departure

THERE'S AN ELECTRICAL ISSUE WITH THE VEHICLE (it is an E-Hybrid) with ERROR MESSAGES THAT RUN IN A CONTINUOUS LOOP (ACC NOT AVAILABLE, PAS RESTRICTED, DRIVING LIGHT CONTROL ERROR, HIGH BEAM ASSIST NOT AVAILABLE, LANE KEEP ASSIST RESTRICTED). THE LOCAL DEALER HAS NOT YET BEEN ABLE TO FIX THE ISSUE. CAR IS UNDER WARRANTY AND HAS BEEN IN THE SHOP FOR A MONTH. WE WERE CALLED TWO TIMES TO PICK UP A "FIXED VEHICLE" AND EACH TIME WE HAD TO RETURN THE CAR ALMOST IMMEDIATELY UPON LEAVING THE DEALERSHIP SINCE THE PROBLEM WAS NOT FIXED. I'VE CONTACTED PORSCHE CUSTOMER SERVICE BUT AS OF YET THERE IS NO RESOLUTION. IT IS VERY CONCERNING SINCE SOME OF THESE ERROR MESSAGES DO AFFECT VEHICLE SAFETY.

NHTSA ODI 11462580

Oct 19, 2021Speed controlDriver assistance

The adaptive cruise control has failed 4 times. As a significant driver in terms of miles driven, the lack of cruise control increases my fatigue and jeopardize the safety of all. Porsche dealer in St Louis explained there it’s not known fx

NHTSA ODI 11437308

Jul 21, 2021Driver assistance

What component or system failed or malfunctioned, and is it available for inspection upon request? ACC Radar gats uncalibrated How was your safety or the safety of others put at risk? no at all Has the problem been reproduced or confirmed by a dealer or independent service center? yes 4 times in one dealer and 2 times on new dealer Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? only by porsche dealers Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? yes the message reads:ACC not Available, Driving permitted, Service necessary. It first appeared on January 19 2020 still not resolved.

NHTSA ODI 11425770

Working with the data? Download all 40 complaints as CSV · fetched from NHTSA July 21, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2019 Porsche Cayenne S verdict →