Good morning all. I have recently been looking around for an F25 30d, but have started to come across tales of timing chain woe. I have been aware of the N47 problems for a few years but hadn't realised that the N57 also had the timing chain on the rear of the engine as well.
My original plan had been to buy a 2014-on high-miler. Have BMW resolved the chain issue with mods to later engines, or is it still on-going? If there have been updates to spec to overcome the issue, roughly when were they introduced?
I have to be honest, if BMW haven't resolved this I'm seriously considering defecting to Audi or Merc. I know they have their own issues, but at least the timing chains are on the front of the engines.
TIA
Stuart.
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N57 timing chain
N57 timing chain
Last edited by StuBeeDoo on Sat Nov 18, 2017 10:52 am, edited 1 time in total.
October 2012 build X3 30d SE, Bluewater. Now with Webasto sunroof and paddle-shift 
Re: N57 timing chain
So far we have had just one unconfirmed timing chain issue reported with any of the N57 series powerplants. The one that could be popped up in the last week and is still being investigated. It is far more common on the V8 engines due to chain guide failures. The N47 has now been replaced by the B47 which (so far) seem OK.
Putting the chain at the rear did seem a bit odd, so BMW must have a lot of confidence in everything being OK for those parts
Putting the chain at the rear did seem a bit odd, so BMW must have a lot of confidence in everything being OK for those parts
Last edited by X5Sport on Sat Nov 18, 2017 1:51 pm, edited 1 time in total.
Never anthropomorphise computers. They hate that.