Vauxhall B15DT Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility

A reconditioned B15DT engine costs £1,300-£2,200 supply-only, with fitted prices around £1,800-£2,800 including labour. Used units are cheaper at £600-£1,100 supply-only but carry higher risk. Reconditioned units include new timing chain, tensioner, gaskets, and often a DPF clean. 12-month warranty is standard on reconditioned engines. Fitted cost varies by workshop - always get 2-3 quotes.

• Reconditioned units include new timing chain, tensioner, gaskets, and often a DPF clean
• 12-month warranty is standard on reconditioned engines
• Fitted cost varies by workshop - always get 2-3 quotes

The two most documented B15DT failures are timing chain wear (80,000-120,000 miles) and DPF clogging from urban use. The timing chain issue can cause catastrophic engine failure if ignored - cold start rattle is the early warning sign. The DPF clogs when repeated short journeys prevent regeneration, causing reduced power and increased fuel consumption. Timing chain replacement costs £800-£1,200 fitted if caught early. A DPF clean costs £300-£600 - replacement is £600-£1,200. Later Euro 6d-temp units (2020+) have improved AdBlue systems.

• Timing chain replacement costs £800-£1,200 fitted if caught early
• A DPF clean costs £300-£600 - replacement is £600-£1,200
• Later Euro 6d-temp units (2020+) have improved AdBlue systems

The B15DT was fitted to the Astra K (2021-2023), Corsa F (2019-2023), Crossland X (2018-2023), Grandland X (2018-2023), Mokka B (2020-2023), Combo D (2018-2023), Vivaro C (2019-2023), and Zafira Life (2019-2023). The engine is PSA's DV5 family, also used in Peugeot and Citroën 1.5 BlueHDi models. Highest-volume UK applications are Astra K and Corsa F. Van variants use the F15DT code but share the same hardware. Always check your specific sub-code before ordering.

• Highest-volume UK applications are Astra K and Corsa F
• Van variants use the F15DT code but share the same hardware
• Always check your specific sub-code before ordering

A used B15DT makes sense only on lower-value cars under £4,000 where the vehicle value doesn't justify a reconditioned unit. For most cars, a reconditioned B15DT is better value: 12-month warranty, new timing chain and tensioner, and DPF clean all included. Used units carry unknown history - timing chain condition is the biggest risk. Reconditioned units cost £1,300-£2,200 but include all major wear items. For a Grandland or Vivaro (value £8k+), reconditioned is the right call.

• Used units carry unknown history - timing chain condition is the biggest risk
• Reconditioned units cost £1,300-£2,200 but include all major wear items
• For a Grandland or Vivaro (value £8k+), reconditioned is the right call

The full engine code (B15DT, D15DT, D15DTH, D15DTL, F15DT, YHZ, or YHY) is stamped on the engine block - typically on the front side near the cylinder head. It also appears on the V5C registration document and on the build sticker in the driver's door jamb or under the bonnet. Different sub-codes indicate different power outputs (102hp vs 130hp). Fitment and ECU compatibility vary - always check before ordering a replacement.

• Different sub-codes indicate different power outputs (102hp vs 130hp)
• Fitment and ECU compatibility vary - always check before ordering a replacement
• Enter your registration above and we'll confirm your exact sub-code

The B15DT is generally reliable for a modern diesel, but the timing chain tensioner is a known wear point that needs attention at higher mileage. Avoid repeated short urban trips if possible - this engine needs regular motorway runs to clear the DPF. Later production units (2020+) appear to have fewer AdBlue/NOx sensor issues than earlier examples. Timing chain inspection at 80,000 miles is strongly recommended. Use the correct low-ash oil (Vauxhall Dexos-spec) for longevity. Most owners report 120,000+ miles with routine servicing.

• Timing chain inspection at 80,000 miles is strongly recommended
• Use the correct low-ash oil (Vauxhall Dexos-spec) for longevity
• Most owners report 120,000+ miles with routine servicing