DRIVEDEXTHE SPEC LAYER

DRIVEDEX / BMW / 3 Series

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

Field patterns from a working mechanic — diagnose your own car before buying parts.

Open Recalls

Checking NHTSA…

Other 3 Series generations

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.