I even showed them the installation guide from BMW quoting 5.5 hours. They complained that BMW always low balls the estimated time and that it doesn't take into account wheel alignment and other necessary adjustments. But at that point, if I'm only asking the dealer to install so I can retain warranty, I may as well ask an independent shop to install it in 4-6 hours and then buy a second set of MP coils if/when anything happens, if ever!
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f87 s55
e92 n54
e30 m20
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