AI Damage2021 Porsche Cayenne: common problems
Owners of the 2021 Porsche Cayenne filed 21 complaints with NHTSA, most often about electrical system and air bags. The maker issued 716 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 21
- Technical service bulletins (TSB)
- 716
What fails most often
- 1 Electrical system 29% of all complaints
- 2 Air bags 19% of all complaints
- 3 Engine 14% of all complaints
- 4 Powertrain 10% of all complaints
- 5 Service brakes 10% of all complaints
- 6 Steering 10% of all complaints
- 7 Forward collision avoidance 10% of all complaints
- 8 Visibility 5% of all complaints
- Electrical system: 6 complaints (29% of all); manufacturer bulletins for this component: 226.
- Air bags: 4 complaints (19% of all); manufacturer bulletins for this component: 1.
- Engine: 3 complaints (14% of all); manufacturer bulletins for this component: 79.
- Powertrain: 2 complaints (10% of all); manufacturer bulletins for this component: 28.
- Service brakes: 2 complaints (10% of all); manufacturer bulletins for this component: 18.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2.9 L · petrol · turbo · 6 cyl
- 3 L · petrol · turbo · 6 cylnamed in 1 complaints
- 4 L · petrol · turbo · 8 cyl
- 3 L · plug-in hybrid · turbo · 6 cylnamed in 1 complaints
- 4 L · plug-in hybrid · turbo · 8 cyl
- automatic, 8-speed
Drive: AWD
Symptoms owners describe
How many of the 21 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 6 | 0 | 226 |
| Air bags | 4 | 0 | 1 |
| Engine | 3 | 0 | 79 |
| Powertrain | 2 | 0 | 28 |
| Service brakes | 2 | 0 | 18 |
| Steering | 2 | 0 | 14 |
| Forward collision avoidance | 2 | 0 | 6 |
| Visibility | 1 | 0 | 30 |
| Fuel/propulsion system | 1 | 0 | 11 |
| Backover prevention | 1 | 0 | 6 |
| Seat belts | 1 | 0 | 5 |
| Equipment | 0 | 0 | 129 |
| Engine and cooling | 0 | 0 | 80 |
| Structure | 0 | 0 | 32 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
There were no visible signs of a coolant leak on the ground, indicating an internal seal failure. My independent technician confirmed that coolant is leaking internally into the vacuum system.
The contact stated that while driving at various speeds, the front driver's side seat belt independently tightened and loosened. The emergency light illuminated, and a seat belt warning chime sounded continuously.
Over approximately the past month, the leather covering on the dashboard of my 2021 Porsche Cayenne has rapidly begun lifting, buckling, and separating across a substantial portion of the dashboard.
Vehicle Information: 2021 Porsche Cayenne E-Hybrid (VIN: [XXX]) Description of Defect: While operating the vehicle, the steering column bolt physically backed out and detached, causing an immediate, complete loss of steering control.
The overall wear is impacting the visibility to the center cluster under certain conditions leading to obscure visibility to important information, including vehicle speed or other warning light.
The contact stated that while in reverse(R), the rearview camera failed to display a clear image on the screen. No warning light was illuminated. In addition, the rear vehicle detection sensor failed to alert the driver of a nearby vehicle. The local dealer was contacted.
I am reporting a safety defect with my 2021 Porsche Cayenne GTS. The leather dashboard is delaminating and lifting away from its underlying structure. This defect is concerning because: The delamination is occurring on the drivers side but will eventually expand in the area covering the passenger-side airbag.
Dashboard leather is separating and was told this could affect the airbag deployment in the case of an accident. Porsche dealership is asking 10k outside of warranty to replace the dash. If it was just cosmetic I could deal with it, but now that it is a safety concern for my passenger I feel forced to overspend.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,228 of 2,102 model years in the NHTSA data (among the 42% least complained about).
On average one model year of the Cayenne has 17 complaints (11 years in the data). This year has 21, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Special Tools and Equipment Information for alignment machines - Q3 2026 Software Spec Update Available
- Porsche intranet posting with Campaign WTK4 information
- Technical Information for Campaign WTK4 – Reset Vehicle Electrical System Battery
- Symptom-based workshop manual for Noises from Front Wiper Blade
- Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
- Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils
- Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils
- Technical Information for Vehicle Color in Front Display/Control Panel Wrong after Replacing Central…
- Technical Information for Yellow Warning Message “All-Wheel Drive System Malfunction”, “C12BEF6” and…
Technical Information for Yellow Warning Message “All-Wheel Drive System Malfunction”, “C12BEF6” and “C133700” in the All-Wheel Electronics Control Unit
- Technical Information for Damage to Nano Plug Contacts Due to Utilization of Incorrect Measuring Equipment
- Technical Information for Warranty Extension for Front Door Wiring Harness related to Real Top View (RTV)…
- Special Tools and Equipment Information for Diagnostic Equipment Standards for all USA Porsche Centers
NHTSA lists 716 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Porsche Cayenne?
Owner complaints to NHTSA most often mention: electrical system, air bags, engine. Total complaints: 21. The most frequent symptoms in complaint texts: warning lights, check engine (29%), jerking, harsh shifts (19%), driver assists: adaptive cruise, lane keeping (5%).
How many service bulletins (TSB) were issued for the 2021 Porsche Cayenne?
NHTSA lists 716 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Porsche Cayenne from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.