Doors

Doors

Due to the body design of each E30 model, doors are not generally compatible between different models. However, doors from identical models of different ages are also interchangeable, but attention needs to be paid to the internal mechanisms, including the wiring loom and window mechanisms.

The front doors of each E30 are model specific, and therefore cannot be interchanged. For example, those fitted to a 2-door are too long to fit a 4-door, while Cabriolet doors lack the window frames needed for a 2-door. However, front doors of a 4-door are interchangeable with a Touring.

The rear doors of 4-door models and Touring models are not interchangeable due to the differing shape of the window frames. However, interior window mechanisms and all interior trim including door cards and handles are interchangeable between the two models.

Learn more about removing and replacing doors

Components

Windows

Pre-facelift electric window mechanism

The internal window mechanisms changed during the facelift, meaning cars up to and including 1987 models have different glass, mechanisms, looms and motors (if fitted) compared to 1988 and later cars. This means that if you are considering installing electric windows to your vehicle, it is important to have the correct mechanism and loom for your model.

Learn how to retrofit electric windows.

Common Problems

Rust

Due to the nature of the door skin, most E30 doors develop rust along their bottom edge, despite the seam sealer applied there by BMW. Surface rust can be rubbed down, filled and repainted, but more serious rot requires the door to be reskinned properly.

Electric Windows not working

The electric windows fitted to E30s are a simple mechanism