Description
This listing is for a diesel particulate filter (DPF) specifically designed for the Vauxhall Astra 1.9 CDTI, engine code Z19DTH, manufactured between 2004 and 2010. This Euro 4 compliant DPF, with OE part number BM11035 (alternative 55204931), is a critical component for reducing harmful particulate matter from your vehicle’s exhaust emissions.
The diesel particulate filter captures soot particles before they can be released into the atmosphere. Over time, these filters accumulate soot and ash, leading to blockages. Common failure modes include excessive soot loading due to short journeys, frequent stop-start driving, or issues with the engine’s regeneration process. Other problems can arise from faulty DPF pressure sensors, differential pressure pipes, or EGT (exhaust gas temperature) sensors, all of which prevent the DPF from regenerating effectively. If left unchecked, persistent blockages can cause increased exhaust back pressure, leading to reduced engine performance, increased fuel consumption, and potential damage to other engine components, including the turbocharger. Physical damage to the internal substrate, often caused by impacts or extreme thermal stress, is also a failure point.
At Gap Turbos, we offer comprehensive DPF services for this unit. Our primary recommendation, where viable, is a professional DPF clean. We utilise advanced workshop ultrasonic and thermal cleaning processes to remove accumulated soot and ash, restoring the DPF to near-new efficiency. We also provide mobile DPF cleaning services and forced regeneration procedures, depending on the DPF’s condition and accessibility. Cleaning is typically 70-90% more cost-effective than a full replacement, provided the internal substrate is intact and undamaged. It is important to note that DPF removal is illegal in the UK and will result in an MOT failure. If a DPF is beyond cleaning, we can advise on new exchange units.
What this diesel particulate filter (DPF) fits
This diesel particulate filter is suitable for:
- Vehicle: Vauxhall Astra 1.9 CDTI
- Engine Code(s): Z19DTH
- Year Range: 2004-2010
- Euro Class: Euro 4
- Original Equipment (OE) Part Number: BM11035
- Alternative Part Number(s): 55204931
We have been Birmingham’s turbocharger and DPF specialists since 1986. For a precise quote on DPF cleaning or replacement, or to discuss our warranty terms, please contact us directly.
Specifications
| Engine code(s) | Z19DTH |
|---|---|
| Year range | 2004-2010 |
| Fuel | Diesel |
| OE number | BM11035 |
| Alternative number(s) | 55204931 |
| Condition | Clean |
| Euro class | Euro 4 |
Vehicle fitment
- Vauxhall Astra 1.9 CDTI
Common faults & troubleshooting
- Reduced engine power or ‘limp mode’: This often indicates a heavily blocked DPF; a professional DPF clean or forced regeneration is usually required.
- DPF warning light illuminated on dashboard: The DPF has reached its soot load limit; attempt a regeneration drive or seek professional cleaning.
- Increased fuel consumption: High exhaust back pressure from a clogged DPF forces the engine to work harder; address the DPF blockage promptly.
- Excessive smoke from exhaust: A failed regeneration or a severely blocked DPF can cause smoke; diagnose and rectify the DPF issue immediately.
- Strong diesel smell from exhaust: Unburnt fuel due to failed regeneration attempts can cause this; check DPF health and associated sensors.
- Engine oil level rising: This can be caused by diesel entering the sump during failed regeneration cycles; change the oil and address the DPF issue.
Fitting notes for this unit
- Always replace all gaskets, clamps, and mounting hardware when refitting the DPF to ensure a gas-tight seal and prevent exhaust leaks.
- Ensure DPF differential pressure pipes and temperature sensors are clean and correctly reconnected; faulty readings will prevent regeneration.
- Check the condition of the EGT (Exhaust Gas Temperature) sensors and DPF pressure sensor; replace if faulty as they are critical for DPF operation.
- After fitting, perform a diagnostic scan to clear any DPF-related fault codes and initiate a forced regeneration if necessary, using appropriate diagnostic equipment.
- Verify the engine oil level and quality; diesel contamination from failed regenerations can damage the engine and must be addressed with an oil change.
- Torque all exhaust clamps and mounting bolts to the manufacturer’s specifications to prevent leaks and ensure secure fitment.
Alternative part numbers
This turbo is also referenced by:
55204931— Vauxhall DPF OEM 55204931 (Vauxhall Astra 1.9 CDTI, Z19DTH, Euro 4)
Need this DPF cleaned?
Most blocked DPFs do not need replacing. Our 5-stage workshop clean restores factory flow at a fraction of the cost of a new filter, and mobile DPF cleaning is available UK-wide for fleets.
DPF Cleaning Service →Need to speak to a DPF cleaning expert?
Send your reg, a photo of the existing part, and a brief description of the fault. We will respond same day.
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