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Hi All, having an absolute nightmare with my 2015 Cayenne E-Hybrid and really would like some advice. At the moment it looks like Porsche are refusing to pay anything towards replacing my hybrid battery even though it’s still under warranty – I could be paying over £10,000 myself to fix it! Brief summary of the situation:

- 1st Feb car would not open. Recovery jump-started it but died again after 24 hours. Specialist then replaced the battery, but it died again 2 weeks later
- Been with OPC since 5th March. It’s now almost July and the car still won’t start. They recommended replacing the control unit as it was emitting high voltage (charging me £2,700). This hasn’t fixed the problem.
- Now Porsche GB want to get a hybrid battery specialist to examine the battery and there's only one in the UK. They think he’s going to conclude that the problem is water damage which will exclude a warranty claim.
- They think cause is water coming in from the sunroof and are blaming me for not getting drains cleared at the last service. There's no mention of drains in service video.
How can an SUV be designed to accept moisture through the sunroof into the hybrid battery?
- I believe the battery was always faulty - from the time I bought it in Nov 2018 it never held charge fully.
- Porsche GB have shown little empathy. Said they’ll 'review the goodwill situation at the end', but OPC telling me it’s unlikely they’ll show any goodwill at all. No courtesy car either so I’ve been without a car for 6 months basically and no end in sight
- It was clear the start that the battery was at fault – they should’ve brought the hybrid specialist in at the beginning. This fanfare with the control unit has just wasted a lot of time and money.

Anyone with a similar experience and any advice? Feel pretty stuck and disillusioned. Loved my Cayenne but the way I’m being treated here I’d never buy a Porsche again.
 

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We had water inside our 2019 e-hybrid. There are two small hoses one on each side where the sunroof channels drain down into the wheel wells. One of ours was pinched during assembly and it leaked every time it rained, only way we noticed was someone was in the back seat and told my wife water was dripping from the rear pillar. All sorted now and luckily have a record.
 

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Hi I have the same problem with my Panamera they have told me water has got in through the charge port and the tail fin because the water channels were blocked and the car must be sent to Germany to be looked at and repaired and they have said it would cost £4000 to send it to Germany and a possible £12000 to repair, my car is just out of warranty but in January I had a 111 point check done on the car and the drain holes ticked off as clear, since January I have done about 4000 miles and we have had a good summer, they say the holes are a service item so seeing that the service interval's are 20000 miles or 2 years how often do the holes have to be checked, how can such a high prestige car have such a fundamental design fault to allow water to get in anywhere near the main high voltage battery pack.
I need help as well.
 

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Sorry to hear this happened to you...

IMO, the ONLY way to TRUELY own these cars is to know how to wrench on them to avoid this kind of shady behavior. Many times I have found solutions to issues that were well known by owners, however, the "stealer" denied the issues even exist to those who didn't know how to DIY.

The same thing happened when a bought a new motorcycle (in '95...LOL). 5x's to the shop for the same issue (loss of cylinder and backfiring), which they claimed to be "normal". After 8-hours of personal troubleshooting, I found it was a single wire to the 2nd coil deep in the harness that had rotted internally...turn the steering head and the issue would appear. After DIY repair, the issue was solved and the bike is still running perfectly today!

Learn to DIY and you will avoid the time wasting grief that the "stealer" will cause...just IMHO.
 

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Sorry to hear people are having the same issue as myself. I have a Porsche Panamera 2014 Hybrid, and the hybrid system has failed. I also found water would gush out when I opened the boot, so obviously the drains were blocked for quite a while and had been slowly leaking water into the battery. It's interesting some are mentioning water ingression through the charge port or through the sunroof channels. This is clearly a design fault, because firstly why are these drains blocking so easily, secondly the battery is supposed to be a sealed waterproof unit.

I have told Porsche that I brought in the car on a number of times for other repairs and updates, and there was an inspection carried out, but these issues were never raised in terms of drains. This was after I told them specifically that the yellow hybrid warning light had come on. I am negotiating with them now to partially cover the cost of the repair as I believe these are design faults and in addition should have been picked up when inspections were made. I will keep you posted. I also have a motoring journalist that a friend is going to be put me in touch with who may write something on this issue being raised. I have seen this on other forums as well. Good luck out there!
 
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