[Beemermike]

I'm excited to share this document with fellow E9x N53 owners, it's the original BMW aftersales training doc for the N53 engine. I originally found this document in Spanish, so I've run it through professional translating software.

The DeepL translator did a pretty excellent job of the translation, albeit there are some leftover grammar mistakes or spacing issues on some of the graphs/tables. Overall though, I've read through majority of it, and it's a fantastic read that gives in-depth knowledge of N53's systems and mechanisms.

I couldn't find this particular doc on any of the forums or on the internet in general, so decided to share it here - see attached.


Alternative download/preview here.

[micdev42]

Hi. As a fellow N53 sufferer, this looks a great reference. Thanks for posting.

[pit330]

Thank you very much Beemermike. I downloaded the document from your post. I wish I came across it in spring of 2023 when I had cold start issues on my 330i N53 and replaced: fuel LP and HP sensors, HPFP and fuel filter (at 175000 km). I still have some issues at cold start, but I will write a post for it.