Transmission & xDrive

Transmission heat exchanger

Manages automatic-transmission fluid temperature.

Where it sits

At the transmission or in the vehicle’s heat-exchanger circuits.

How it works

Separated passages transfer heat to coolant or air while retaining the transmission fluid.

Think of it as

A cooling station for the gearbox’s working fluid.

Symptoms when it fails

Leaks or temperature faults may involve the exchanger, pipes or cooling circuit.

Lifespan

Use the exact gearbox and axle service guidance. Loads, seals, lubricant condition and driving use influence wear.

Repair cost

An accessible mount or seal differs from internal transmission work. Gearbox identification and diagnosis are essential to a useful quote.

The BMW angle

A BMW transmission heat exchanger can be integrated with coolant routing rather than a standalone front radiator.

Used in

BMW rear-drive, front-drive and xDrive applications as equipped; layouts differ by platform.

Sources
Same system

Transmission & xDrive