Porsche Cayenne DIY Maintenance Starts

Needed a break from writing today, so took a hour off to chase some mechanical niggles on the Cayenne.

I’ve not been super impressed with the audio quality from the PCM 2.1 system so far. It’s hard to believe Porsche could ship such bad sounds. Radio reception is absolutely tragic, and playback from CD not much to write home about.

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As a long-term car hi-fi geek, I’ve got a lot of quality audio components in the garage, so thought I’d strip a door card off and look at what the Cayenne packs into those massive enclosures. Getting the card off was easily done thanks to Renntech – membership there is the best money I’ve spent on this car so far. It seems like every Porsche tech question you could ask is covered on Renntech or the Rennlist Cayenne Forum: I would be stuffed without them.

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I found the PDF for the door card removal and off it came. Look at that woofer! Should definitely sound better than it did. I checked all the connections and fixed a dislocated rubber speaker ring that was rattling. Then sat in the truck and played with some audition discs. Turning the loudness off was a big step up. It sounds a lot better now, though I may still do something with the front end and get more bass in the trunk.

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As I’m not selling the PCM this week, I left it playing and did a few more bits. I had been warned me about the rear washer pipe which can become disconnected behind the driver’s A-pillar, so I had a look at that. Apparently that can pour water into the ECU – which has already been replaced on this Cayenne.

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Taking the A-pillar trim off was easy thanks to Rennlist. Getting it back on was a pig but let’s gloss over that. I found the pipe and also a kink in the line – no doubt a cause of the thing popping off. I used a cable tie to stop the kink, and put it all back together.

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Turning on the squirt was an experience, as it streamed down the width of the screen. I got one of the kids to work the switch and it was coming out from around the third brake light. Obviously a pipe was disconnected.

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Rennlist told me how to get that light out – you split the spoiler from inside the tailgate. There’s a lot of gear underneath that roof spoiler! I reckon one of my aerials might be U/S so will have that checked out.

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Anyway, I got the brake light out and shot some compressed air though the jet, put it all back together and it works, although there is still a bit coming from the light. I’m sure the connecting pipe has gone hard, so will get a new bend to replace it.

Got a few more jobs to do but am on some deadlines for tomorrow. Back to work!

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