Tag Archives: 335i

BMW 135i – Serpentine Belt Issues and Fix (N54)

A few weeks ago the car started making a squeaking noise. So, I popped the hood and started taking a video. Here is what I found:

As soon as I noticed the shredding serpentine belt, I drove home and parked the car. Ordered a new belt and tensioner, along with oil filter housing gaskets (#1 & #2) because mine were leaking. Once the parts¬†arrived, Bob helped me install everything.¬†Here is a picture of the OFH gaskets going in, what a mess…
Oil filter housing gaskets

Obligatory picture of the shredded belt:
Shredded serpentine beltWe put everything back together and assumed all was good. Wrong. About 50 miles later, the belt started shredding again. This time it started wrapping around the alternator pulley and burnt up the backside of the brand new tensioner pulleys.

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