AI Damage2018 Porsche Cayenne: common problems
Owners of the 2018 Porsche Cayenne filed 13 complaints with NHTSA, most often about electrical system and engine. The maker issued 612 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 13
- Technical service bulletins (TSB)
- 612
What fails most often
- 1 Electrical system 23% of all complaints
- 2 Engine 23% of all complaints
- 3 Fuel/propulsion system 15% of all complaints
- 4 Air bags 15% of all complaints
- 5 Powertrain 8% of all complaints
- 6 Visibility 8% of all complaints
- 7 Tires 8% of all complaints
- 8 Exterior lighting 8% of all complaints
- Electrical system: 3 complaints (23% of all); manufacturer bulletins for this component: 143.
- Engine: 3 complaints (23% of all); manufacturer bulletins for this component: 78.
- Fuel/propulsion system: 2 complaints (15% of all); manufacturer bulletins for this component: 9.
- Air bags: 2 complaints (15% of all); manufacturer bulletins for this component: 1.
- Powertrain: 1 complaints (8% of all); manufacturer bulletins for this component: 32.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.6 L · petrol · 6 cyl
- 3.6 L · petrol · turbo · 6 cyl
- 4.8 L · petrol · turbo · 8 cyl
- 3 L · plug-in hybrid · turbo · 6 cyl
- automatic, 8-speed
- dual-clutch (DCT), 8-speed
Drive: AWD
Symptoms owners describe
How many of the 13 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 | 3 | 0 | 143 |
| Engine | 3 | 0 | 78 |
| Fuel/propulsion system | 2 | 0 | 9 |
| Air bags | 2 | 0 | 1 |
| Powertrain | 1 | 0 | 32 |
| Visibility | 1 | 0 | 18 |
| Tires | 1 | 0 | 9 |
| Exterior lighting | 1 | 0 | 3 |
| Forward collision avoidance | 1 | 0 | 3 |
| Equipment | 0 | 0 | 143 |
| Engine and cooling | 0 | 0 | 69 |
| Structure | 0 | 0 | 29 |
| Wheels | 0 | 0 | 23 |
| Service brakes | 0 | 0 | 17 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
My vehicle was placed in service in 2018 and remains within that statutory coverage window through 2028. PCNA has not addressed this statutory obligation or provided written confirmation of coverage.
Driving through a parking lot, less than five miles an hour, and suddenly heard a horrible knocking sound. Stopped and looked under the car. Nothing. Drove it very slowly to mechanic less than a mile away. Front drive shaft had collapsed and fallen down, according to the mechanic.
The vehicle was driven to the side of the road and was later towed to the local dealer who determined that the front passenger’s side tire sidewall had blown out. The cause of the failure was not yet determined. The contact stated that the vehicle had not driven over any object to cause the failure.
This is not accident related, but what appears to be a systemic issue related to Cayenne and Macan leather dashboards. The issue is related to delamination of the leather dash cover that can impede the safe deployment of the passenger airbag.
The Porsche Cayenne that equipped with leather dashboard are peeling off over the time. If the vehicle in an accident, the airbag on the passenger side dashboard may not deploy correctly. I am finding many cayenne owners are having this issue. I really hope NTSB can issue a recall.
While the vehicle was charging, the protective sheath near the power outlet of the charging cable had possible electrical or fire damage. No warning lights were illuminated. Upon turning off the power and unplugging the outlet, it was determined that the plastic near the plug melted and caused the power to short.
Our 2018 Porsche Cayenne has a problem with the headlights and water intrusion that is affecting the functioning of the headlights. I took it to someone to look at and they said this should not be happening, that it is a manufacturer defect.
The following days were not any better for my daughter- she missed a major accident because of the unexpected burnt smell and loud warnings of an overheat of the engine by Porsche in the middle of a highway.
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 1,401 of 2,102 model years in the NHTSA data (among the 33% least complained about).
On average one model year of the Cayenne has 17 complaints (11 years in the data). This year has 13, below average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Special Tools and Equipment Information for alignment machines - Q3 2026 Software Spec Update Available
- Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils
Note that this bulletin covers all models back to model year 1984, for which C40 engine oils are allocated.
- Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils
Note that the bulletin covers all models back to model year 1984, for which C20 engine oils are allocated.
- Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils
Note that the bulletin includes all models back to model year 1984, for which C30 engine oils are allocated.
- Manufacturer's Certificate for Overview of Approved Porsche A40 Engine Oils
Note that this bulletin covers all vehicles from model year 1997 to 2020, for which A40 engine oils are assigned. Model years 1997-2001 are not available for selection in the system.
- Technical Information for Damage to Nano Plug Contacts Due to Utilization of Incorrect Measuring Equipment
- Special Tools and Equipment Information for Diagnostic Equipment Standards for all USA Porsche Centers
- Special Tools and Equipment Information for alignment machines - Q2 2026 Software Spec Update Available
- Product Knowledge for Model Type Designations
- Product Knowledge for Chassis/VIN Numbering Systems
- Belt Lock Warning on Driver Side Permanently Active / No Fault Memory Entries
Delete Airbag Control Unit Fault Memory (SY 74/25)
- Allocation of Approved Engine Oils MY 2027 (13/26)
NHTSA lists 612 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 2018 Porsche Cayenne?
Owner complaints to NHTSA most often mention: electrical system, engine, fuel/propulsion system. Total complaints: 13. The most frequent symptoms in complaint texts: smoke, burning smell, fire (15%), jerking, harsh shifts (8%), headlights and tail lights (8%).
How many service bulletins (TSB) were issued for the 2018 Porsche Cayenne?
NHTSA lists 612 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 2018 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 2018 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.