BMW DPF regeneration conditions: what your car needs
The conditions a BMW diesel needs before its DPF can regenerate.
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If a DPF (diesel particulate filter) warning shows on your BMW's iDrive or cluster, the filter can only regenerate when every condition below is met. If any isn't, the DPF can block, and may in the end need a costly replacement.
This guide is for information only. If you follow it, you do so at your own risk, and we accept no liability for any damage to your car or belongings.
The conditions for a regeneration
These conditions are based on BMW service information.
- The coolant temperature is above 75°C.
- The exhaust gas temperature before the diesel particulate filter is above 240°C.
- There's enough fuel: half a tank is recommended. Whenever the reserve light comes on, the regeneration stops.
- No fault codes for the air mass system, the exhaust emission system or their sensors are stored in the DDE (the engine control unit).
- Fault codes 480A / 245700 (from F01) and 481A / 245800 (from F01) show the status "currently not present".
- You drive at a steady speed above about 60 km/h (about 37 mph). The best speed is about 100 km/h (about 62 mph).
Common questions
What speed does a BMW need for a DPF regeneration?
A steady speed above about 60 km/h (about 37 mph). About 100 km/h (about 62 mph) is best.
How much fuel do I need?
Half a tank is recommended. The regeneration stops whenever the reserve light comes on.
What happens if the conditions aren't met?
The DPF can't regenerate, can block, and may in the end need replacing.
The warning won't clear. What now?
Check for stored fault codes in the DDE, as any for the air mass system, exhaust emission system or sensors stop a regeneration. We can read them for you.
Need a hand?
We can read the fault codes and diagnose your car in person at our Oldbury workshop or remotely. Questions first? WhatsApp us on 0121 295 1900.
