DRIVEDEXTHE SPEC LAYER

DRIVEDEX / BMW / 3 Series

2019–2025

BMW 3 Series

2.0L turbo I4 (B46/B48) B46/B48 Sedan (G20)

The default sport sedan for a reason — stout drivetrain, boring in the best way.

Engine Oil

Viscosity
✓ verified
US-market spec — don't sub thicker oil without reason
src: OilFinderPro + BimmerWorld/Blauparts
Capacity (with filter)
5.3 L◐ pending
Sources split 5.2–5.3 L — top off by the iDrive level readout
src: AMSOIL lookup + oil guides
Oil filter
✓ verified
src: RM European + OEM Bimmer Parts
Drain plug torque
— in verification queue
Being confirmed against the TIS

Fluids

Coolant
✓ verified
Never top an HT-12 car with old blue G48
src: FCP Euro guide + Turner PN
ATF (automatic)
◐ pending
8HP 'lifetime' fill — many service it ~60–100k anyway
src: ZF data sheet + BimmerWorld
Brake fluid
✓ verified
Flush every 2 years
src: BimmerWorld brake fluid guide
Fuel
◐ pending
Manual minimum AKI 89
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
Pre-gapped OE — fit and forget
src: Europa Parts + BimmerWorld

Electrical

Battery
◐ pending
Register the new battery so the IBS/charging strategy resets
src: FCP Euro fitment + BimmerTech
Key fob battery
◐ pending
Slim G-series fob
src: Battery Equivalents fob guide

Wheels & Wipers

Wheel bolt torque
140 Nm✓ verified
M14 bolts on G-chassis
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
Many owners halve it on turbo DI engines
src: BMW dealer service pages
Oil service reset
◐ pending
src: G20 reset guides

🔧 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.