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Hi there,

I have a 2008 Porsche Cayenne (Canada spec), and recently my driver side headlight has been very unstable. I took it to the dealership, and they told me I need to replace this part at $600/unit + tax (they recommended me to change passenger side too):
IGNITION CONTROL UNIT ( PART #: 955-631-194-03)

My questions:
1) is this just the xenon ballast?

2) technically I only need to replace one right? (probably died due to moisture getting into the casing throughout time)

3) Is the OEM Porsche xenon ballast made by Valeo? I found 2 models from Valeo below, but I'm not entirely sure which one to be using, the 4pin or the 12pin
- Valeo LAD5G (12pin)
- Valeo LAD5GL (4pin)

4) Is there any other reputable "aftermarket" brand to substitute the D1S xenon ballast in the Cayenne?

Thanks in advance for any input!
 
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