Euro Mechanic

G82 M4 Competition - first impressions after 5000km

BMW service intervals - are they too long?

Remote ECU tuning experience - sent file, got results

From a reliability standpoint, the LCI is significantly better. The N47 timing chain issue is gone with the B47, and the N20 timing chain problems are gone with the B48. The LCI al...

5 months ago

Ive seen both successes and failures with DPF cleaning at the shop. The key is catching it early. If the DPF warning light just came on and the car still drives normally, cleaning ...

5 months ago

Always use BMW-approved coolant (blue) or Zerex G-48. Never mix green and blue coolant - they use different corrosion inhibitors and mixing them creates a gel that clogs the system...

5 months ago

From a mechanics perspective, xDrive adds complexity - transfer case, front driveshaft, front diff. More things that can wear out. But BMW xDrive is very reliable these days. Just ...

5 months ago

Good guide. A few additions: always replace the brake pad wear sensor when doing pads - theyre one-time use and cost about 10 EUR each. After installing new pads and rotors, do a p...

5 months ago

The N20/N26 electric water pump typically fails between 60-100k km. Warning signs: coolant temperature fluctuations on the gauge, occasional overheating warnings that go away, and ...

5 months ago

The N62 is a great engine when maintained but has some well-known issues. The valve stem seals are the biggest one - they harden and cause oil burning, especially on cold start. Re...

5 months ago

As a mechanic, I see a lot of tuned B47 engines and they hold up very well to stage 1 power levels. The internals are the same as the 230hp 325d version, so 240hp is well within th...

5 months ago

VRSF downpipe is solid quality for the price. I have it on my M340i and no fitment issues. No drone at cruise either, just a nice deep tone under acceleration.

6 months ago

As a mechanic I see the consequences of failed DPFs regularly. A clogged DPF can cause turbo failure due to excessive backpressure, and the constant regen cycles put extra stress o...

6 months ago

As a mechanic who has worked on dozens of E38s — the 740i with the M62TU V8 is the smarter buy. Still has the presence and luxury of the 7 Series but maintenance costs are roughly ...

6 months ago

From a mechanic perspective, the xDrive transfer case failures I see most often are on F30 xDrive models (328i/335i xDrive) and X3/X5 models. The ATC 450 unit used in these cars ha...

6 months ago

From a mechanic perspective, the E31 is one of the most complex BMWs to work on. The engine bay is incredibly tight, especially on the V12 — simple jobs like spark plug replacement...

6 months ago

300hp is definitely achievable on B48 with stage 1. My 330i made 305hp on the dyno with just a remap. No hardware changes needed.

6 months ago

Nice gains on the B47! I got similar numbers on mine. The midrange torque is where you really feel the difference. Highway overtaking is effortless now.

6 months ago

which tuner did you use? ive been looking at getting my 320d remapped too but theres so many options its hard to choose

6 months ago

As a mechanic who has done over 50 S65 rod bearing jobs, here are some additional tips: The engine does NOT need to come out for bearing replacement. You can drop the subframe and ...

6 months ago

The expansion tank is the number one cause. I replace 3-4 per week at my shop. The plastic becomes brittle after 5-6 years and develops cracks that only leak under pressure. A pres...

6 months ago

The single mass flywheel conversion on the M54 is a great choice — the dual mass flywheels on these engines fail regularly and the replacement cost is 800+ EUR. The single mass fly...

6 months ago

For a daily that never sees a track, lowering springs are fine. Eibach Pro-Kit drops about 25mm and the ride quality is barely affected. Save the money.

6 months ago