Technical

Like any BMW, the E30 is a complex precision machine, precision-built and designed to last. But even the simplest of machines needs maintenance occasionally, so keep your E30 running the way it should, it helps to familiarise yourself with the design, and the components. The Technical section of the E30 Zone Wiki is your one-stop source for maintenance tips, common problems, upgrades and troubleshooting.

Your E30 is broken down into separate sections, to help you understand each part in turn.

Engines

Main article: Engines

Drivetrain

Gearbox

Main article: Gearbox

Differential

Main article: Differential

When upgrading your engine, upgrading your differential at the same time is almost mandatory.

Brakes

Main article: Brakes

While moving in the E30 is an utterly delight, the need to stop moving is sometimes necessary. For that reason, the E30 was fitted with front discs on all models. The smaller-powered 316 and 318 saloons were fitted with rear drum brakes, while all six-cylinder models and Tourings had rear discs as standard.

Suspension

Main article: Suspension

All E30s are fitted with McPherson struts for front suspension, bolting up to a single control arm at the bottom. This is reinforced by an anti-roll bar connecting the control arm to the front subframe. The rear wheels have independent suspension of springs and shocks, and are connected to the rear subframe via trailing arms. Another anti-roll bar clamps the trailing arms to the body.

Steering

Main article: Steering

Body Styles and Fittings

Main article: Bodywork

Electrical

Main article: Electrics