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Electrical systemPart report

2004 Porsche Cayenne S Electrical system Problems

Complaints
7about this part
Share
15%of 48 total for the year
Median mileage
77,059miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 7 complaints about the electrical system of the 2004 Porsche Cayenne S, 15% of the 48 complaints for this model year. Where a mileage was given, the median is 77,059 miles. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“While driving with both of my children in the rain my entire car locked and my windshield wipes stopped my windows wouldn't roll down and my doors locked on and off my alarm system started to go off uncontrollably even while driving Porsche isn't being of any help giving me run arounds also my check engine light came on in the process of the incident”

NHTSA complaint #10852514, filed 2016-03, 152,000 miles

“While driving I heard a loud knocking noise and coming from under the center console and my truck started to shake. I came to a complete stop then proceeded on but once the truck got over 20mph the knocking noise started again .”

NHTSA complaint #10705035, filed 2015-04, 134,390 miles

“Driver side door will not open from inside or outside without warning luckily it happened to my young son so he could get out and get in from other door to drive to dealer. Dealer had to replace the new door lock, according to dealer same thing had happened to few cars.in the past. My concern is what would have happened is it was me or my wife , we are not flexible enough to get out from other doors. What happens in case of emergency when you can not open the door. …”

NHTSA complaint #10618496, filed 2014-08, 105,000 miles

“**uncontrolled acceleration** Cayenne S accelerated uncontrollably while driving. While driving at approx 60 MPH, I encountered traffic ahead and took my foot off the accelerator, however the car began accelerating. I tried lifting the pedal with my foot, no luck, applied the brakes and the car slowed, however, when I removed my foot from the brake, the cayenne continued to accelerate. The cruise control had not been activated and was off. …”

NHTSA complaint #10303704, filed 2010-02, 77,059 miles

“The rear brake lights (left, right and high mounted) remain lit at all times, as does the rear right and left fog lights. Turning lights on or off has no effect. Depressing the brake pedal has no effect. This problem has occurred randomly and inconsistently and when the car has been unoccupied and unattended as well as while driving. While unattended, the lights coming on drains the battery and can strand the driver. If problem occurs and the battery is not drained, the driver may be wholly unaware of the problem and may drive with the brake and rear fog lights lit. …”

NHTSA complaint #10284245, filed 2009-09, 75,000 miles

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2005110%
2004715%

Other parts of the 2004 Porsche Cayenne S

Transmission and drivetrain
14 complaintsEngine cooling
11 complaintsFuel system
8 complaintsEngine
6 complaintsLatches, locks and linkages
4 complaintsTires
4 complaintsBrakes
3 complaintsAir bags
2 complaintsExterior lighting
2 complaintsBody and structure
2 complaintsVehicle speed control
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaints

← All problems reported for the 2004 Porsche Cayenne S

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology