Change Car Rear Silencer BMW 1-Series

Change Car Rear Silencer

Easy 0h45–2h00 ~75–200£
Estimated time 0h45–2h00
Estimated labour cost ~75–200£
Difficulty Easy
Remove/refit the silencer 0h45–2h00
Renew the silencer 0h45–2h00
Repair the silencer* 1h30
Repair the front silencer* 1h30
Align the front silencer* 0h30
Remove/refit the main silencer 1h00–1h30
Renew the main silencer 1h00–1h30
Repair the main silencer 0h30
Align the main silencer* 0h30
Difficult main silencer removal* 0h30
Remove/refit the rear silencer 0h45–1h30
Renew the rear silencer 0h45–1h30
Reduce rear silencer of end tube (max. 1cm) 0h30
Repair the rear silencer 0h30
Weld a sheet-metal repair panel onto the rear silencer* 0h45
Difficult rear silencer removal* 0h30
Remove/refit the rear silencer trim 0h30
Renew the rear silencer trim 0h30
Remove/refit the front silencer 1h00–1h30
Renew the front silencer 1h00–1h30
Repair the front silencer 0h30
Repair the main silencer* 1h30
Align the main silencer 0h30
Remove/refit both rear silencer trims 0h30
Renew both rear silencer trims 0h30
Repair the rear silencer* 1h30

What is a BMW 1-Series rear silencer?

The rear silencer (also called the back box or rear muffler) reduces exhaust noise to an acceptable level. It is located at the end of the exhaust line, after the catalytic converter, particulate filter (if fitted), and sometimes an intermediate silencer.

When should you change the BMW 1-Series rear silencer?

No periodic replacement interval is specified. Carry out regular visual inspections for corrosion, holes, and deteriorated mounting rubbers. Signs that replacement is needed: louder exhaust noise, rattling from loose baffles, visible rust holes, exhaust fumes entering the cabin, or failure at the MOT/roadworthiness test.

Is it difficult to change the BMW 1-Series rear silencer?

Difficulty level 2/5: technically easy but may require effort if bolts and clamps are rusted. Key steps: raise the vehicle, apply penetrating oil to clamp bolts, remove the clamp connecting the silencer to the intermediate pipe, remove the mounting rubber hangers, fit the new silencer with new gasket/clamp, reattach mounting rubbers, check for leaks with engine running.

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View your 1-Series maintenance plan (keep the 1-Series token) →

3 models covered

Model Year Range Engines covered Fuel
1-Series 2004-2013 2004-2013 116d Diesel (N47D20A), 116d Diesel (N47D20C), 116i Petrol (N43B16A), 116i Petrol (N43B20A), 116i, -LPG LPG,Petrol (N45B16A), 118d Diesel (M47D20TU2), 118d Diesel (N47D20A), 118d Diesel (N47D20C), 118i Petrol (N43B20A), 118i Petrol (N46B20B), 118i, -LPG LPG,Petrol (N46B20B), 120d… Diesel, LPG, Petrol
1-Series 2011-2019 2011-2019 114d Diesel (B37D15A), 114d Diesel (N47D16A), 114i Petrol (N13B16A), 116d Diesel (B37D15A), 116d Diesel (N47D20C), 116d EfficientDynamics Diesel (B37D15A), 116d EfficientDynamics Diesel (N47D16A), 116i Petrol (B38B15A), 116i Petrol (N13B16A), 118d Diesel (B47D20A), 118d Diesel (… Diesel, Petrol
1-Series 2019-2025 2019-2025 116d Diesel (B37C15A), 116i Petrol (B38A15A), 118d Diesel (B47C20B), 118i Petrol (B38A15A), 118i Petrol (B38A15F), 120d xDrive Diesel (B47C20B), 120i Petrol (B48A20A), 128ti Petrol (B48A20E), M135i xDrive Petrol (B48A20E) Diesel, Petrol

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