Did you have original spark plugs?
Mine were labelled NGK-R (4 prong), but I believe the OE parts still had the BMW stamp, no?[/QUOTE]
yep, same here...
probably were the originals. However, I just bought some with the BMW stamp 4 prongs plugs. But the past owners of the 04 were business owners and they cared for the car very much...I think they got tired of paying for the scheduled maintenance then the rear drive shaft went bad...they took it to the dealer as they usually do and the dealer mostlikely scared the hell out of them with the cost of removing and installing the rear drive shaft. They concluded that they've poured too much money into it and it's time to get out (typical)...this is just my speculation.
- The trick with old spark plug: undo it just a bit, maybe 1/4 turn, then STOP.
- Spray some WD-40 or PB Blaster down the hole and let it sit for about 2-3 minutes.
- This prevents stripping the threads, also the spark plugs come out much easier.
- During install, I use a tiny bit of anti-seize (the equivalent of "a drop of water").
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