EGR valve
usually 100,000–180,000 km · Medium risk
Signs: Limp mode
Fix: Clean or replace
€250–600
Engine: common problems, timing drive and oil
2.0 CDTI (A20DTH / A20DTR)
Diesel · 1,956 cm³ · 81–143 kW
4
model generations
2
known faults
396,000
new cars in the EU (2010–2025)
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
Fuel: Diesel. Timing drive: belt · 150,000 km / every 120 mo.
In our database this engine is fitted to 4 model generations, among them: Opel Insignia A, Opel Zafira Tourer C, Opel Insignia B, Opel Astra J.
The most expensive known risk is injectors: it usually appears at 150,000–230,000 km and costs €600–1,400 to fix.
Key facts
| Fuel | Diesel |
|---|---|
| Displacement | 1,956 cm³ |
| Power | 81–143 kW |
| Years | 2008–2020 |
| Timing drive | Belt · 150,000 km / every 120 mo |
| Oil | 5W-30 · dexos2 · ~4.5 L · every 15,000 km |
| Engine codes | A20DTH, A20DTJ, A20DTL, A20DTR, A20DT, A20DTE, A20DTC, B20DTH, B20DTJ, B20DTL |
Known engine faults
Faults that belong to the engine itself. They apply to every model with this engine, and each model has its own extra faults on its model page.
Injectors
usually 150,000–230,000 km · Medium risk
Signs: Smoke, hard start
Fix: Replace
€600–1,400
Engine-related service
Intervals and typical prices, using the Opel Astra J as an example. The app gives the exact plan for your car.
| Item | Interval | Typical price |
|---|---|---|
| DPF health check (soot / ash load)Emissions | every 20,000 km | €0–60 |
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Fuel filterFuel | every 30,000 km or every 24 months | €40–110 |
| Glow plugsEngine | every 100,000 km | €120–300 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing belt kit + water pumpEngine | every 150,000 km or every 120 months | €450–900 |
Models with this engine
Model generations this engine is fitted to.
Opel Astra J 2009–2015Opel Insignia A 2008–2017Opel Insignia B 2017–2022Opel Zafira Tourer C 2011–2019
Common questions
Does the 2.0 CDTI (A20DTH / A20DTR) engine have a timing chain or a timing belt?
Belt · 150,000 km / every 120 mo.
What oil does the 2.0 CDTI (A20DTH / A20DTR) engine take?
5W-30 · dexos2 · ~4.5 L · every 15,000 km.
What are the known problems with the 2.0 CDTI (A20DTH / A20DTR) engine?
The faults with the highest risk: injectors (150,000–230,000 km, €600–1,400); EGR valve (100,000–180,000 km, €250–600).
Which cars have the 2.0 CDTI (A20DTH / A20DTR) engine?
Opel Insignia A, Opel Zafira Tourer C, Opel Insignia B, Opel Astra J.
Sources and notes
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles.
Updated 08/10/2026