Exhaust rear silencer (back box) replacement for your BMW X4
Typical price £103 · About 1 hour
Blowing, rattling or loud exhaust? A new rear silencer, fitted at a local garage.
What the job involves
The rear silencer (back box) is the part of the exhaust most likely to rust through. When it blows, the car gets louder, can smell of fumes and may fail its MOT. Replacing it means working under the car, so this job is done at a local independent garage with a vehicle lift.
The garage checks the rest of the system while the car is up and tells you about anything else before doing it.
Common signs
- Exhaust louder than usual
- Rattle from under the back of the car
- Exhaust fumes smell
- MOT advisory for exhaust corrosion
Included in the price
- New rear silencer to OE spec
- New clamps and rubber hangers
- Leak check of the whole system
- Disposal of the old part