[F32y]

I own a bmw 420i 2015 (production 4/14 ) how should i know if i have the revised / updated timing chain , my car has 80000 km (50k miles) and i dont hear any whining or weird noises

[Billfitz]

You know by the production date. After 2/15 you're good.

[wespiard]

As Billfitz said, your production date is 04/14, so you have the old set up.

Just keep an ear or two on it and then after 70k/7 years (extended warranty expires) you can consider having the work done out of your own pocket. Or risk it up to 100k+ miles for less reimbursement from BMW.

[Rockinryan2424]

Originally Posted by Yehya

I own a bmw 420i 2015 (production 4/14 ) how should i know if i have the revised / updated timing chain , my car has 80000 km (50k miles) and i dont hear any whining or weird noises

Got 70k on my 2013 n20 engine is stout I wouldn't get worried too much unless you start hearing a whining coming from the engine (trust me the forums scared the fuck outta me too.) I check sometimes take the oil filler cap off use a rag you'll be splashed sometimes not fun don't recommend and listen you can easily tell if you do that since the timing chain is right there. Anyways good luck!

[PunchyPancake]

Is it really the timing chain that is the issue here? It doesn't have any revisions as far as I can tell.

It is the oil pump chain drive that had 2 revisions at 04/15 and 01/16.