Change Car Particulate Filter (DPF) BMW 4-Series
Change Car Particulate Filter (DPF)
| Estimated time | 0h30–2h00 |
|---|---|
| Estimated labour cost | ~50–200£ |
| Difficulty | Easy |
| Vehicles |
4-Series 2013-2020 14
4-Series 2020-2025 4
|
| Check the catalytic converter | 0h30 |
| Remove/refit the catalytic converter | 1h30–2h00 |
| Renew the catalytic converter | 1h30–2h00 |
| Remove/refit the diesel particulate filter | 3h00–18h00 |
| Renew the diesel particulate filter | 3h00–18h00 |
| Remove/refit the diesel particulate filter/catalytic converter assembly | 3h00–5h00 |
| Renew the diesel particulate filter/catalytic converter assembly | 3h00–5h00 |
| Remove/refit the petrol particulate filter temperature sensor | 0h30–0h45 |
| Remove/refit the petrol particulate filter differential pressure sensor | 0h30–1h30 |
| Renew the petrol particulate filter differential pressure sensor | 0h30–1h30 |
| Renew the petrol particulate filter temperature sensor | 0h30–0h45 |
| Prepare the catalytic converter heat shield for installation* | 0h45 |
| Remove/refit the petrol particulate filter | 19h00 |
| Renew the petrol particulate filter | 19h00 |
What is a BMW 4-Series particulate filter?
Diesel engines and direct-injection petrol engines produce soot particles. The particulate filter (DPF/GPF) traps these harmful particles as exhaust gases pass through its honeycomb structure. It is placed on the exhaust line after the catalytic converter.
How does the BMW 4-Series particulate filter work?
As soot accumulates, the filter periodically burns off (regenerates) the trapped particles. Active regeneration raises exhaust temperatures to 550–600°C, burning soot to ash. This occurs every 300–500 km during normal motorway driving. Vehicles driven only on short urban trips may not regenerate properly, leading to blockage.
When should you change the BMW 4-Series particulate filter?
The DPF is designed to last 150,000–250,000 km but depends on driving patterns. Signs of needed replacement: DPF warning light, engine in limp mode, excessive exhaust smoke, or diagnostic scan showing excessive back-pressure or failed regeneration cycles.
Can the BMW 4-Series particulate filter be cleaned instead of replaced?
Yes, professional DPF cleaning can restore a blocked filter at a fraction of replacement cost. However, if the filter substrate is cracked, melted, or structurally damaged, replacement is the only option. Never use a DPF removal/delete service — it is illegal and will fail the MOT/emissions test.
Is it difficult to change the BMW 4-Series particulate filter?
Difficulty level 2/5: technically straightforward but physically demanding due to the filter's location and weight. Key steps: raise the vehicle, disconnect pressure sensors, remove exhaust clamps/bolts, lower the old DPF, fit the new one with new gaskets, reconnect sensors, clear fault codes, perform a forced regeneration cycle.
2 models covered
| Model | Year Range | Engines covered | Fuel |
|---|---|---|---|
| 4-Series 2013-2020 | 2013-2020 | 418d Diesel (B47D20A), 418d Diesel (N47D20C), 418i Petrol (B38B15A), 420d Diesel (B47D20A), 420d Diesel (N47D20C), 420d, -xDrive Diesel (B47D20A), 420d, -xDrive Diesel (N47D20C), 420d, -xDrive M Performance Diesel (B47D20A), 420d, -xDrive M Performance Diesel (N47D20C), 420i, -x… | Diesel, Petrol |
| 4-Series 2020-2025 | 2020-2025 | 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420i Petrol (B48B16A), 420i, xDrive Petrol (B48B20A), 430d mHev, xDrive 48V (MHEV),Diesel (B57D30B+JA1), 430i, -xDrive Petrol (B48B20B), M4 Competition, -xDrive Petrol (S58B30… | 48V (MHEV), Diesel, Petrol |
