Fuel filter Opel Astra J A20DTH (2.0) — Mann, Mahle, Filtron
Fuel filter for Opel Astra J A20DTH (2.0L, 2009–2015) — Mann, Mahle, Filtron, WIX and Hengst part numbers with replacement interval.
Technical Specifications
| Parameter | Value |
|---|---|
| Make / Model | Opel Astra J |
| Engine Code | A20DTH |
| Fuel type | diesel |
| Production Years | 2009–2015 |
| Connection type | push-fit |
| Filter housing | external |
| Replacement interval | 30 000 km |
Compatible Fuel Filters
| Brand | Part Number |
|---|---|
| Mann-Filter | WK 939/7 |
| Mahle / Knecht | KL 441 |
| Filtron | PP 990 |
| WIX Filters | WF8385 |
| Hengst | H240WK |
Replacement Interval
Replace every 30 000 km or every 2 years for diesel engines.
Fuel filter replacement is critical preventative maintenance for Common Rail engines — contaminated injectors cost tens of times more than a new filter.
Signs of a Clogged Fuel Filter
- Loss of power and hesitation under acceleration
- Difficult cold starts (especially after the car has been parked overnight)
- Rough idling or stalling at low speed
- Increased fuel consumption
- Fault code P0087 (low fuel rail pressure)
FAQ
Which fuel filter fits Opel Astra J A20DTH?
Mann WK 939/7, Mahle KL 441, Filtron PP 990. Connection type: push-fit, housing: external.
How often should the fuel filter be replaced on a diesel Opel?
Every 30 000 km or every 2 years. If using lower-quality diesel, replace every 15,000–20,000 km.
Do I need to depressurise the fuel system before replacing the filter?
Yes — on most Common Rail systems. Switch off the engine and wait 10–15 minutes for rail pressure to drop before removing the filter.
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