A20DTH — 2.0 CDTI 16v (2008-2015)
- Power Output
- 158-165bhp
- Years Fitted
- 2008-2015

VAUXHALL ASTRA 2.0 CDTI SPECIALISTS
Looking for a Vauxhall Astra 2.0 CDTI engine replacement- Get quotes today from trusted UK Vauxhall Astra 2.0 CDTI engine specialists. Compare prices on reconditioned, rebuilt and used engines for your Astra 2.0 CDTI - whether you need a direct swap or a performance rebuild for your SRi, Elite or GTC variant.
How it works
Clear information first, then the right engine and specialist for your exact vehicle.
Variant History
The Vauxhall Astra 2.0 CDTI first appeared in the Mk5 (H) generation and became a cornerstone of the Mk6 (J) range, offering a robust 2.0-litre common-rail diesel that balanced performance with economy across SRi, Elite, SE and GTC trims.

Z20DTJ launched in Astra Mk5 (H), 2.0 CDTI 16v, 148bhp, Euro 4
A20DTH introduced in Mk5 facelift, 158bhp, Euro 5 with DPF
A20DTH continues into Mk6 (J) Astra, 162bhp and 165bhp variants
A20DTR Bi-Turbo arrives, 192bhp, fitted to GTC and high-output Astra models
Mk6 2.0 CDTI production ends; replaced by 1.6 CDTI and 1.5 diesel units in Mk7
Every engine fitted to the Vauxhall Astra 2.0 CDTI is covered below, with UK rebuilt pricing and known failure points.
Engine Codes & Pricing
Find your exact engine code, specs and UK replacement cost guide.

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-> Get quotes for A20DTH Vauxhall Astra 2.0 CDTI engine replacementCommon Problems
The Vauxhall Astra 2.0 CDTI is a widely respected diesel workhorse, but it has a few well-documented failure points. The A20DTH and related codes use a timing belt rather than a chain - an important distinction from many modern diesels. DPF and EGR systems are the primary sources of running issues, while injector seal failure and fuel system contamination are also common. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.
Common failure points and repair options
Whether your Astra 2.0 CDTI has suffered a snapped timing belt, blocked DPF, failing injectors or turbo issues, a replacement engine can give it a new lease of life. Every rebuilt engine through EnginesMarket carries a minimum 12-month unlimited-mileage warranty and is supplied with upgraded components addressing the original failure points. Compare quotes from our UK-wide network of Vauxhall Astra 2.0 CDTI specialists today - and avoid main dealer premiums.
FAQ
Everything Vauxhall Astra 2.0 CDTI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.
Why Choose Us
Comparing quotes for your Vauxhall Astra 2.0 CDTI engine replacement is completely free and carries no obligation. Our UK-wide network of vetted Vauxhall Astra 2.0 CDTI specialists will provide transparent, itemised pricing for used, reconditioned and rebuilt engines matched to your exact engine code - whether you need an A20DTH, A20DTR or A20DTJ. Enter your registration above and get quotes tailored to your Astra 2.0 CDTI today.
Compare quotes from trusted UK Vauxhall Astra 2.0 CDTI engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.