2007–2010
BMW 3 Series
3.0L twin-turbo I6 (N54) N54 Sedan/Coupe/Convertible (E90/E92/E93)
Tuner royalty with a maintenance tax — budget like the turbos owe you money.
Engine Oil
Viscosity‼
✓ verified
LL-01 approval is the requirement, not the brand
src: N54 oil guides (multiple)
Capacity (with filter)
6.5 L✓ verified
src: Engine Oil Journal + e90post
Oil filter
✓ verified
Same cartridge as N52/N55 sixes
src: Turner + ECS listings
Drain plug torque‼
— in verification queue
Being confirmed against the TIS
Fluids
Coolant‼
✓ verified
HT-12 green back-serves G48 cars
src: FCP Euro coolant guide
ATF (automatic)‼
✓ verified
Shell M-1375.4 spec, GA6HP19Z — 'lifetime' means ~50–60k service in the real world
src: ZF/Turner + ECS listings
Brake fluid‼
✓ verified
Flush every 2 years
src: BimmerWorld brake fluid guide
Fuel
◐ pending
Manual minimum AKI 89 — turbo pulls timing on it
src: BMW owner's manual (quoted)
Filters & Ignition
Engine air filter
— in verification queue
Being confirmed
Cabin filter
— in verification queue
Being confirmed
Spark plugs
✓ verified
OE gap ~0.028 in (0.7 mm); tuned cars often close to ~0.022 in
src: Turner + BimmerWorld listings
Electrical
Battery
◐ pending
Register the new battery so the IBS/charging strategy resets
src: FCP Euro fitment + BimmerTech
Key fob battery
— in verification queue
Being confirmed
Wheels & Wipers
Wheel bolt torque‼
120 Nm✓ verified
M12 bolts
src: BimmerWorld + Bimmer Guides
Tire pressure
— in verification queue
Varies by size/load — run the driver-door placard values
Wipers
— in verification queue
Being confirmed — sizes vary by trim
Service
Oil change interval
✓ verified
5–7.5k is the smart play on a turbo DI engine
src: BMW dealer service pages
Oil service reset
◐ pending
src: E46/E90/F30 reset guide
🔧 Mechanic's Notes
- HPFP failure is the N54's signature move — long cranks and limp mode. Many cars got pumps under the extended campaign; verify which pump is in yours.
- Wastegate rattle on cold start means worn actuator bushings, and it slowly creeps into boost control.
- Piezo injectors are pricey and index-sensitive — diagnose per-cylinder and replace misfiring ones in matched pairs.
- Direct injection means carbon on the intake valves; a walnut blast every 60–80k wakes the midrange back up.
Field patterns from a working mechanic — diagnose your own car before buying parts.
Open Recalls
Checking NHTSA…
Other 3 Series generations
2001–2005
BMW 3 Series
2.5L/3.0L I6 (M54) · M54
5W-30 LL-016.9 qt oil88.5 lb-ft lugs
2007–2011
BMW 3 Series
3.0L I6 (N52) · N52
5W-30 LL-016.9 qt oil88.5 lb-ft lugs
2012–2015
BMW 3 Series
3.0L turbo I6 (N55) · N55
6.9 qt LL-01 oil103 lb-ft lugsZF Lifeguard 8 ATF
2012–2016
BMW 3 Series
2.0L turbo I4 (N20) · N20
5.3 qt LL-01 oil103 lb-ft lugsChain guides: pre-2015 alert
2019–2025
BMW 3 Series
2.0L turbo I4 (B46/B48) · B46/B48
0W-20 LL-17 FE+HT-12 coolant103 lb-ft lugs
2020–2025
BMW 3 Series
3.0L turbo I6 (B58) · B58
0W-20 LL-17 FE+6.9 qt oil103 lb-ft lugs
Sources shown per value. Specs can vary by build date, market and trim — for anything critical (torque, fluids), confirm against YOUR owner's manual or door sticker before wrenching. Spotted an error? — corrections jump the queue.