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VAUXHALL ASTRA 2.0 CDTI SPECIALISTS

Vauxhall Astra 2.0 CDTI Engine Replacement Compare 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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Vauxhall Astra 2.0 CDTI Engine
from£1,000 to £2,000
  • Usedfrom £350
  • Reconditionedfrom £1,000
  • Common codesA20DTH, A20DTR, A20DTJ

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

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
  1. 2004

    Z20DTJ launched in Astra Mk5 (H), 2.0 CDTI 16v, 148bhp, Euro 4

  2. 2008

    A20DTH introduced in Mk5 facelift, 158bhp, Euro 5 with DPF

  3. 2010

    A20DTH continues into Mk6 (J) Astra, 162bhp and 165bhp variants

  4. 2012

    A20DTR Bi-Turbo arrives, 192bhp, fitted to GTC and high-output Astra models

  5. 2016

    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

Vauxhall Astra 2.0 CDTI Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

A20DTH — 2.0 CDTI 16v (2008-2015) engine

A20DTH — 2.0 CDTI 16v (2008-2015)

Power Output
158-165bhp
Years Fitted
2008-2015

Common Problems

Vauxhall Astra 2.0 CDTI Engine Problems Repair Cost vs Replacement

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

Timing Belt & Water Pump Failure

Affected
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.

Repair options

Repair tierDealer priceSpecialist price
Preventative - timing belt & water pump replacement£500-£800£350-£550
Full Replacement - rebuilt/reconditioned engine£2,500-£4,500£1,800-£3,000
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.
-> Compare rebuilt A20DTH Vauxhall Astra 2.0 CDTI engine prices

DPF & EGR Clogging

Affected
Vauxhall Astra 2.0 CDTI (all variants, 2004-2016)
Typical failure mileage
50,000-100,000 miles (urban use)
Root cause
The 2.0 CDTI's Diesel Particulate Filter (DPF) and Exhaust Gas Recirculation (EGR) valve clog with soot when the car is used predominantly for short urban journeys. The DPF cannot regenerate fully without sustained motorway driving, leading to blockage, limp mode and increased fuel consumption.

Repair options

Repair tierDealer priceSpecialist price
DPF clean / forced regeneration£200-£400£150-£300
EGR valve clean or replacement£300-£600£200-£400
DPF delete / replacement£800-£1,500£600-£1,200
Full Replacement - rebuilt/reconditioned engine£2,500-£4,500£1,800-£3,000
Our recommendation
If your Vauxhall Astra 2.0 CDTI is used primarily for short trips, take it for a 30-minute motorway run once a week to allow the DPF to regenerate. If you're already seeing warning lights or reduced power, get a diagnostic check immediately - caught early, a DPF clean or EGR replacement is far cheaper than a full engine replacement.
-> Compare rebuilt A20DTH Vauxhall Astra 2.0 CDTI engine prices

Injector Seal Failure & Fuel System Contamination

Affected
Vauxhall Astra 2.0 CDTI (A20DTH, A20DTJ, 2008-2015)
Typical failure mileage
60,000-120,000 miles
Root cause
Injector seals can fail, allowing combustion gases to leak past the injector - this creates a "chuffing" or ticking noise, particularly under load. Soot and black gunk around the injector base is a tell-tale sign. Fuel system contamination (swarf in the filter) can also indicate high-pressure fuel pump failure, which can destroy injectors and the fuel rail.

Repair options

Repair tierDealer priceSpecialist price
Injector seal replacement£300-£600£200-£400
Injector replacement (one or more)£600-£1,200£400-£800
HPFP replacement (with injectors)£1,500-£2,500£1,000-£1,800
Full Replacement - rebuilt/reconditioned engine£2,500-£4,500£1,800-£3,000
Our recommendation
If you hear a ticking or chuffing noise from your Vauxhall Astra 2.0 CDTI that increases under load, inspect the injector area for soot. Catching injector seal failure early costs £200-£400 and prevents much more expensive problems. If you find swarf in your fuel filter, have the entire fuel system inspected immediately - contamination spreads quickly and can write off an engine.
-> Compare rebuilt A20DTH Vauxhall Astra 2.0 CDTI engine prices

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.

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FAQ

Vauxhall Astra 2.0 CDTI Engine ReplacementFrequently Asked Questions

Everything Vauxhall Astra 2.0 CDTI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare Vauxhall Astra 2.0 CDTI Engine Prices Today

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.

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