Advan performance, N54/N55 routine servicing & performance products

[BMW86]

Originally Posted by JB4135

Your part# is correct Vinney. 12137594937 is the genuine BMW coil. The Bosch one is aftermarket. I bought some Bosch one's from the US at $28each.

Originally Posted by skycat

Yes Vinney that is the part No on the box. Bosch make most of the electronic items for BMW.

Thanks for the confirmation guys. Is it safe to assume they are exactly the same? Btw, how often should I be changing my coil packs? Is it worthwhile to change out the whole lot? I've had some misfire issues in the past. Plugs were changed 6k ago.

[JB4-335]

Here you go

[Justin@ADVAN Performance]

Originally Posted by jerra-roo

Anyone using the Redline Gear Oil 75w140 for the stock 135i differential?

Hey mate,

are you FBO and do you track/drag race your car or does it only see serious street use with a tune?

If you are not tracking/drag racing the car or it's not heavily modified and would prefer to use Red Line over Motul, the 75W140 High Performance Gear Oil would be a good substitute for the Heavy Shockproof Gear Oil, as it's also compatible with the Hypoid gear open differential in your 1'er.