Vauxhall Astra 2.0 CDTI Engine ReplacementCompare Prices & Get Quotes
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.
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12-Month Warranty
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From £1,000 to £2,000
Used from £350 · Reconditioned from £1,000 · Common codes: A20DTH, A20DTR, A20DTJ
From £350
Tested, bare/short engine
From £1,000
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain

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3 Simple Steps3 Simple Stepsto Finding the Best Vauxhall Astra 2.0 CDTI Replacement Engineto Finding the Best Vauxhall Astra 2.0 CDTI Replacement Engine
Most replacements completed within 3-5 days.
Vauxhall Astra 2.0 CDTI - Engine History & Specs at a Glance
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.

Vauxhall Astra 2.0 CDTI - Engine History & Specs at a Glance
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.
Vauxhall Astra 2.0 CDTI
Engine History Timeline
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
Key Specs Snapshot
Every engine fitted to the Vauxhall Astra 2.0 CDTI is covered below, with UK rebuilt pricing and known failure points.
Vauxhall Astra 2.0 CDTI Engine Codes - Specifications & Replacement CostVauxhall Astra 2.0 CDTI Engine Codes - Specifications & Replacement Cost
2.0 CDTI 16v (2008-2015)
Compatible Trim Levels
- Astra SRi
- Astra Elite
- Astra SE
- Astra Tech Line
- Astra GTC Sport
- Astra ecoFLEX

Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£350-£800
Reconditioned
Addressed known issues, tested
£1,000-£2,000
Rebuilt
Full teardown, upgraded internals
£1,800-£3,000
Common Failure
Timing belt and water pump require replacement at 100,000 miles or 10 years - the A20DTH uses a belt-driven camshaft and water pump, not a chain. Injector seal leaks (sooting around injectors) and DPF/EGR clogging are also widely reported.


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.

Why the Vauxhall Astra 2.0 CDTI Needs Regular Belt Changes
Affected Vehicles
Vauxhall Astra 2.0 CDTI (A20DTH, A20DTR, A20DTJ, 2004-2016)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
The 2.0 CDTI uses a timing belt, not a chain. Belts degrade over time and can snap, causing catastrophic valve and piston damage. The water pump is driven by the same belt - if it seizes, the belt can fail prematurely.
Why It Happens
The 2.0 CDTI uses a timing belt, not a chain. Belts degrade over time and can snap, causing catastrophic valve and piston damage. The water pump is driven by the same belt - if it seizes, the belt can fail prematurely.
Dealer (parts + labour)
£500-£800
Specialist (parts + labour)
£350-£550
What it involves
New timing belt kit, tensioner, idler and water pump
Suitability
Essential every 100k miles or 10 years - prevention is far cheaper than repair
Dealer (parts + labour)
£2,500-£4,500
Specialist (parts + labour)
£1,800-£3,000
What it involves
Supply & fit, upgraded components, 12-month warranty
Suitability
If belt has snapped causing internal damage - replacement is often cheaper than a full rebuild
| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
Preventative - timing belt & water pump replacement Minor | £500-£800 | £350-£550 | New timing belt kit, tensioner, idler and water pump | Essential every 100k miles or 10 years - prevention is far cheaper than repair | |
Full Replacement - rebuilt/reconditioned engine Best Value | £2,500-£4,500 | £1,800-£3,000 | Supply & fit, upgraded components, 12-month warranty | If belt has snapped causing internal damage - replacement is often cheaper than a full rebuild |
Vehicle Value Check
Vehicle Value Check
A typical Vauxhall Astra 2.0 CDTI (Mk6, 2009-2015) is worth approximately £2,000-£8,000 depending on mileage, condition and trim. For Astra 2.0 CDTI examples valued under £4,000, a preventative belt change (£350-£550) is strongly recommended; if the belt has snapped, full replacement cost (£1,800-£3,000) may approach 50-70% of vehicle value - evaluate whether a used engine (£350-£800) offers better value than a reconditioned unit on lower-value cars.
Our Recommendation
Our Recommendation
If you own a Vauxhall Astra 2.0 CDTI approaching 100,000 miles and you've not changed the timing belt and water pump, do it now. Prevention costs £350-£550 at an independent specialist - a snapped belt will cost £1,800+ for a replacement engine. If you're already hearing rattling or have experienced a failure, compare rebuilt versus used pricing carefully; for higher-value examples (£4,000+), the 12-month warranty on a reconditioned unit often justifies the premium.

Don't Let Engine Failure Write Off Your Vauxhall Astra 2.0 CDTI
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.
Compare rebuilt A20DTH Vauxhall Astra 2.0 CDTI engine prices
Important Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Vauxhall Astra 2.0 CDTI. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Vauxhall Astra 2.0 CDTI Engine ReplacementFrequently Asked Questions
Question 1How much does a Vauxhall Astra 2.0 CDTI engine replacement cost-
A Vauxhall Astra 2.0 CDTI engine replacement typically costs £1,000-£3,000 for a reconditioned unit supply-only, with used engines from £350-£800. Fitting adds approximately £455-£650 in labour (7-10 hours at indie rates). Main dealer prices are typically 30-50% higher. The exact cost depends on your engine code (A20DTH, A20DTR or A20DTJ) and the extent of any auxiliary damage.
- Used A20DTH engine: £350-£800
- Reconditioned A20DTH: £1,000-£2,000
- Supply & fit: £1,500-£3,000+ depending on condition
Question 2What are the signs of timing belt failure in a Vauxhall Astra 2.0 CDTI-
The 2.0 CDTI uses a timing belt, not a chain. Warning signs include a rattling or slapping noise from the front of the engine, particularly on cold start, or a ticking noise that increases with engine speed. If the belt snaps, the engine will cut out immediately - and because the 2.0 CDTI is an interference engine, valves will strike pistons, causing catastrophic internal damage.
- Listen for unusual noises from the timing cover area
- Check service history - belt and water pump should be changed every 100k miles or 10 years
- If the belt snaps, do not try to restart - you'll cause more damage
- Replacement engine cost: £1,800-£3,000 fitted
Question 3Is it worth replacing the engine in a Vauxhall Astra 2.0 CDTI-
It depends on your Astra 2.0 CDTI's overall condition and value. A Vauxhall Astra 2.0 CDTI (Mk6, 2009-2015) is typically worth £2,000-£8,000. A reconditioned engine supply and fit costs £1,800-£3,000. For an Astra 2.0 CDTI worth over £4,000, replacement is usually worthwhile, especially with a 12-month warranty. For Astra 2.0 CDTI examples under £2,000, a used engine (£350-£800) or scrapping may be more economical.
- Vehicle worth £4,000+: reconditioned replacement makes financial sense
- Vehicle worth £2,000-£4,000: compare used vs reconditioned carefully
- Vehicle worth under £2,000: evaluate scrap value first
Question 4How long does a Vauxhall Astra 2.0 CDTI engine replacement take-
A Vauxhall Astra 2.0 CDTI engine replacement typically takes 7-10 hours of labour at an independent specialist. Allow 2-3 working days for the full supply-and-fit process, including delivery of the replacement unit. Main dealers may take longer due to scheduling. Some specialists offer express fitting - ask when you get your quote.
- 7-10 hours labour at £65/hr indie rates
- Supply & fit typically completed within 3 working days
- Mobile fitting is not recommended for engine swaps - use a workshop with proper equipment
Question 5What's the difference between the A20DTH and A20DTR engines in the Vauxhall Astra-
Both are 2.0 CDTI diesel engines from the same family, but the A20DTR is a Bi-Turbo variant producing 192bhp, while the A20DTH produces 158-165bhp. The A20DTR was fitted to the Astra GTC and high-output Astra models from 2012. Both share the same 1,956cc displacement and timing belt system, but the A20DTR's twin-turbo setup adds complexity and cost if repairs are needed.
- A20DTH: 158-165bhp, single turbo, 2008-2015
- A20DTR: 192bhp, Bi-Turbo, 2012-2016
- A20DTR replacement parts are typically more expensive
Question 6Does a replacement Vauxhall Astra 2.0 CDTI engine come with a warranty-
Yes. Every rebuilt Vauxhall Astra 2.0 CDTI engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Used engines typically come with a shorter warranty (30-90 days) depending on the supplier - always confirm the warranty terms before purchasing. Reconditioned engines also include upgraded components where applicable, addressing the original failure points.
- Rebuilt engines: 12-month unlimited-mileage warranty minimum
- Reconditioned engines: 12-month warranty typical
- Used engines: 30-90 day warranty (check with supplier)
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