Start Here
New to the E30, or shopping for one? Begin with the big read.
Problems & Buying
E30 Common Problems & Buyer's Guide
The full rundown — where they rust, the engine-specific issues, what to inspect, which variant to buy, and the red flags that should make you walk away.
Read the guide →DIY Guides
The two must-do jobs on any older E30 — both beginner-to-intermediate friendly.
DIY · Ignition
Tune-Up Guide
Cap, rotor, plugs, wires and filters — wake the engine up in an afternoon with basic hand tools.
Read guide →DIY · Cooling
Cooling System Refresh
Radiator, water pump, thermostat and hoses — the single most important job to save these engines.
Read guide →Ownership
What it really takes to live with one.
Costs
What It Costs to Own & Maintain
Current buying prices by variant, realistic running costs, the rust wildcard, and whether it's a smart buy.
Read guide →Parts & Brands
Best Maintenance Parts & Tools
The go-to brands and parts for keeping an E30 M20/M42 healthy — service, cooling, timing, suspension and brakes.
Read guide →Performance
Make a good chassis great — where to spend for handling, sound and feel.
Guides for Every BMW
Generation-agnostic buyer's guides that apply to your E30 too.
DIY Tools
The kit every BMW owner needs
Engine Oil
The right spec by engine family
OBD2 Scanners
Codes & battery registration
Floor Mats
All-weather & cargo liners
Detailing Kit
Brake dust, swirls & leather
Dash Cam
Protection & parking mode
Phone Mount
Magnetic, vent & bracket
LED Bulbs
Interior, plate & canbus
Tires
All-season, summer & winter
Car Covers
Indoor & outdoor
Battery Tender
AGM trickle charger
Microfiber & Wash
Swirl-free wash kit
Replacement Battery
AGM & registration
BimmerCode
Coding & hidden features
Dragy GPS Meter
0-60, ¼-mile & lap timing
All Generations
E30 → G20