Models · BMW
BMW M3 E30 buying guide
The original M3, built from 1986 to 1991 as a homologation car for touring car racing, with a high-revving 16-valve four-cylinder and widened bodywork. Almost all are coupés, with a small run of convertibles and the limited Evolution models.
The versions
- 2.3 16-valve four-cylinder (S14): about 200PS, 195PS with a catalyst, rising to 215PS from September 1989
- Evolution models: Evo 2 (1988, about 220PS) and the 2.5-litre Sport Evolution (1990, about 238PS, 600 built)
- 5-speed Getrag manual, with a dog-leg first gear on European cars
- Coupé, plus 786 convertibles; all were built in left-hand drive
What to check on a E30 M3
3 model-specific things to look at when you view one. They're a starting point, not the full inspection.
Oil pressure and the bottom end
What to look for: With the engine warm and idling, watch for the oil pressure warning light flickering and listen for a knock from low down in the engine. Ask whether a compression test has been done, and for the result.
Why it matters: Low oil pressure at idle can point at worn main bearings or a tired oil pump on the S14. Head gasket failures also occur, which a compression test shows up. A car with recent test results and an engine rebuild invoice from a specialist is in a strong position.
Rust in the sills, rear arches and subframe mounts
What to look for: With a torch and a mirror, look at the inner sills as well as the outer ones, then at the rear wheel arches and the area around the rear subframe mounts underneath.
Why it matters: These are the areas most prone to corrosion on the E30 M3, and outer sills can look tidy while the inner ones have decayed. On a car valued as highly as this, the condition of the metal matters more than almost anything else.
Boot floor and window surrounds
What to look for: Open the boot, lift the floor covering and look for rust or damp. Then look closely around the front and rear window seals for bubbling paint.
Why it matters: The boot floor and window surrounds are known rust spots on the E30 M3, along with the arches and sills. Clean metal here is a good sign, and so is evidence of proper specialist repairs.
Also in the full guide
- Idle and throttle response
- Valve clearances and oil leaks
- Instrument cluster and service indicator battery
- The cold start, test drive and paperwork checks for the exact version you're viewing
The full guide to the E30 M3
The CrankSight guide walks you round the car on your phone at the viewing, with every check for the exact version you're looking at: what to look for, where to find it, and what anything you find is likely to cost. As you go it builds an assessment of that car, and if you view more than one, it lines them up side by side.
£29 for the model, used on as many cars as you like, delivered within 72 hours or your money back.
Other generations
BMW M3 E36 · BMW M3 E46 · BMW M3 E90/E92/E93 · BMW M3 F80 · BMW M3 G80/G81
General points for the model, last checked October 2026. Every car is different, so treat this as a guide to what to look at, not a verdict on any car. CrankSight is independent and has no connection with BMW.