Change Car Rear Silencer BMW 2-Series
Change Car Rear Silencer
| Estimated time | 0h45–1h30 |
|---|---|
| Estimated labour cost | ~75–150£ |
| Difficulty | Easy |
| Remove/refit the silencer | 0h45–1h30 |
| Renew the silencer | 0h45–1h30 |
| Repair the silencer* | 1h30 |
| Remove/refit the front silencer | 1h30 |
| Renew the front silencer | 1h30 |
| Repair the front silencer* | 1h30 |
| Align the front silencer* | 0h30 |
| 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 |
| 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 rear left silencer trim | 0h30 |
| Renew the rear left silencer trim | 0h30 |
| Remove/refit the main silencer | 1h30 |
| Renew the main silencer | 1h30 |
| Renew the centre silencer | 1h30 |
| Remove/refit the centre silencer | 1h30 |
| Repair the main silencer* | 1h30 |
| Repair the rear silencer* | 1h30 |
| Remove/refit the front silencer Manual transmission | 1h30 |
| Remove/refit the front silencer Automatic transmission | 1h30 |
| Renew the front silencer Manual transmission | 1h30 |
| Renew the front silencer Automatic transmission | 1h30 |
| Remove/refit the rear right silencer trim | 0h30 |
| Renew the rear right silencer trim | 0h30 |
| Remove/refit both rear silencer trims | 0h45 |
| Renew both rear silencer trims | 0h45 |
What is a BMW 2-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 2-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 2-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.
2 models covered
| Model | Year Range | Engines covered | Fuel |
|---|---|---|---|
| 2-Series 2014-2021 | 2014-2021 | 218d Diesel (B47D20A), 218d Diesel (N47D20C), 218i Petrol (B38B15A), 218i Petrol (B48B20A), 220d Diesel (N47D20C), 220d M Performance Diesel (N47D20C), 220d, -xDrive Diesel (B47D20A), 220d, -xDrive Diesel (B47D20A), 220d, -xDrive M Performance Diesel (B47D20A), 220i Petrol (B48B… | Diesel, Petrol |
| 2-Series 2022-2025 | 2022-2025 | 218i Petrol (B48B20A), 220d, -mhev 48V (MHEV),Diesel (B47D20B), 220i Petrol (B48B20A), 230i Petrol (B48B20B), M240i, -xDrive Petrol (B58B30B) | 48V (MHEV), Diesel, Petrol |
