Software Problems of Porsche Cayenne

S10 direct reply letter to the secretary from regarding having problems with his 2008 Porsche Cayenne. The consumer stated he experienced numerous safety problems with the electrical system and brakes. The consumer stated he filed two separate arbitration against the dealer and the manufacturer. The first arbitration case was settled in 2009, with the expectation all of the problems with the vehicle, current, past and present would be properly identified and resolved. Since the initial arbitration case, the consumer had to take the vehicle back to the dealer 11 times for the same electrical/software problem. The on-going problem uncontrollably affected the proper positioning of the outside mirrors and the overall safety aspect when operating the vehicle. The dealer replaced the onboard computer control module seven times, as their field technical expert suspected there was an unidentifiable electrical shortage or a computer related software virus somewhere within the electrical system. The consumer believed the dealer had no idea how to resolve the problem.

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Have experienced ongoing electrical system mirror problems, with my 2008 Porsche Cayenne, where the outside mirrors moved on their own while driving and parking. First experienced this electrical system mirror problem on (3/23/09) at 12,391 miles, as this car was taken to same dealership where I had purchased it (inskip penske Porsche in warwick, ri (12) separate times for unsuccessful attempts at repair. The repair invoices are available for the following visits: 3-23-09 = 12,391 / 3-31-09 = 12,592 / 4-2-09 = 12,992 / 9-13-10 = 25,668 / 9-28-2010 = 26,186 / 12-16-10 = 28,179 / 8-24-11 = 38,186 / 9-13-11 = 38,664 / 9-30-11 = 39,249 / 12-19-12 = 47,715 / 1-24-13 = 47,973 / 3-7-13 = 48,199. Purchased the car brand new on (2/4/08) with only 24 miles on the odometer. Computer control unit was replaced at least 10 separate times, as this car may have had software virus & or an electrical shortage. The dealership seems not to not know how to properly program this car, as they claimed that the car was ready to be picked up on (3/7/13) after being in their shop for 37 days since the 11th visit beginning on (1/24/13). Less than 12 miles later, I had to return the car back to the dealer for the 12th time on (3/7/13), because the spare key which they had programmed we suspect may have had old software which corrupted the computer system. This problem again caused the mirrors to move in all kind of different directions, thus causing a major safety issue when driving or operating the vehicle. They finally ordered another computer replacement & 2 new keys which they programmed successfully without further problems. Prior to this 12th repair, I came close to being involved in at least 4 near mis accidents, as cars were not visible in my blind spot, especially when the mirrors move on their own. Have gone through two arbitrations. Updated 03/15/lj.

**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. I kept pressing the gas pedal and releasing it at least a dozen times and finally the Cayenne stopped accelerating on its own, only to lose any control to accelerate. I coasted into a parking lot and stopped the car. Turned it off and restarted - I was able to drive, however acceleration was very slow and gear indicator on the dash cluster displayed a black 'd' in an orange square. This is a symbol that does not exist in the owners manual. The car shifted through gears normally. The rapid uncontrolled acceleration repeated itself and I was able to pull into another parking lot, slowing and stopping the car thanksto massive 14" front brakes with 6 piston calipers and 13"+ rear brakes with 4 piston calipers. I turned the car off for a few minutes and restarted. Gear selection indicator appeared normal and I was able to drive off, however acceleration was still veryslow. Drove home with the rapid acceleration repeating itself again and then stopping after a few miles. The only reason this did not cause a crash is the massive braking power of the Cayenne and astute driving. I ran diagnostic software when I made it home and there was an "accelerator module" failure reported. The tail lights, alarm, central locking, and the ability to open the tailgate at all have also failed - "rear lighting control module" failure. So while driving, my tail lights failed, car accelerated uncontrollably and failed to accelerate in a safe normal manner. This is a major safety issue and should be promptly addressed!.

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