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2010 2011 BMW 5 Series Forum F10 Serpentine belt replacement |
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06-04-2019, 08:53 PM | #1 |
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Drives: F10 LCI BMW 535i msport
Join Date: Jan 2016
Location: Philadelphia
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Serpentine belt replacement
Hi All,
Today, while doing 80 mph on the PA turnpike in my 2014 535 I felt a weird snap and rubber flopping feeling on the driver's side. Thought it might be a tire but it wasn't. All of a sudden I had a charging malfunction warning followed by loss of AC, loss of power steering and a limited chassis function warning. I managed to limp the car to the dealership which was six miles away. From everything I've read, this is a serpentine belt, a very common bugaboo for this engine. My question is has anyone had something similar happen, and if so, how much did the bill wind up being? Also, at 126k miles, do I have any recourse because it's a known issue? Thanks! |
06-04-2019, 11:20 PM | #2 | |
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06-04-2019, 11:54 PM | #3 |
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Replaced my entire belt drive system as preventative at 100k. It’s good practice on any car at this mileage and includes replacing the idler pulleys.
I would highly recommend replacing the tensioner and idler pulleys when having the belt replaced. |
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06-05-2019, 08:43 AM | #4 |
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What's "special" about the N55 and a few other BMW engines, is that it's not just a normal serpentine belt failure.
First, the common failure item of the oil filter housing gasket can lead to oil leaking all over the belt, tensioner and nearby coolant hoses etc... This leaking oil causes the belt to fail faster than it normally would. (But there's still lots of warning) When the belt breaks, it's very common for it to get wound up behind the main pulley and belt shrapnel gets forced through the front main seal and into the timing chain and oil pan. This is a big deal. You really, really don't want a belt failure on these engines because the collateral damage could mean a new engine, or thousands in labour to recover all of the pieces of belt. There's lots of threads on this. Check your belts and pulleys! Watch for OFHG leaks! |
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