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F32 435i - coolant smell but no visible leak, where to look?

Request: dark mode for the forum

BMW performance tuning for beginners - complete guide to getting more power safely

BMW stage 1 vs stage 2 tuning — what is the actual difference?

DPF cleaning service - does it actually work?

BMW dyno results database - share your before and after numbers

X5 E70 3.0d - DPF problems at 180k km

Coolant flush on N55 - DIY guide

B58 engine - the best BMW engine ever made?

For anyone considering EGR delete as part of a stage 1 diesel tune - most good tuners will include EGR off in the remap at no extra cost. It's a simple software change that goes ha...

5 months ago

First step: read the fault codes with ISTA or any OBD scanner. The most common codes after a remap are boost-related (overboost or underboost) or lambda sensor codes. If its a boos...

5 months ago

Good write-up. To answer the warranty question above - technically yes, BMW can detect a remap through the ECU flash counter (it increments each time the ECU is written to). Howeve...

6 months ago

For anyone worried about warranty - coding changes don't show up in the dealer's diagnostic system in most cases. The dealer would have to specifically look for non-standard coding...

6 months ago

before spending money on cleaning, check the differential pressure sensor. its a small sensor on the DPF that measures how clogged it is. if the sensor is faulty it can report fals...

6 months ago

Did this on my E92 last month. Took me about 4 hours total including the VCG. Saved about $800 compared to the shop quote. Totally worth doing yourself if you have basic mechanical...

6 months ago

started with Bimmercode, eventually moved to E-Sys. for a beginner Bimmercode is the way to go. the E-Sys interface looks like it was designed in 2003 and one wrong click can brick...

6 months ago

if youre in a country where EGR delete is possible, its one of the best things you can do for a diesel BMW. the intake manifold stays clean, the engine runs cooler, and you elimina...

6 months ago

ISTA is invaluable for anyone who does their own maintenance. Being able to read dealer-level fault codes, run component tests, and do service resets saves hundreds of euros per ye...

6 months ago

Check out KP Engineering in Munich or Schmiedmann in Denmark (they ship). Both are very experienced with N54 builds. KP did my turbo swap and the quality of work was excellent.

6 months ago

I tuned my F80 to stage 2 without doing the crank hub first. Biggest mistake ever. Hub slipped at 8k km after the tune, engine needed a full rebuild. $15k lesson learned. If stock,...

6 months ago

I've tuned both extensively. The B58 is the better engine in every measurable way. But the N55 has a certain character that the B58 lacks - the turbo spool, the exhaust note, the r...

6 months ago

the B58 doesnt have the soul of an S54 or S65 though. those engines had character. the B58 is clinical perfection but lacks emotion

7 months ago

BMW service intervals are way too long. 10k km oil changes are the way to go. Your engine will thank you at 200k+ km.

8 months ago

Count me in. F30 335i. How will shipping be organized?

8 months ago