Timing chain stretch
Attaches to A20DTH at engine level · Engine · carried by 3 variants across 3 chassis
Overview
Timing chain stretch is a common fault recorded against A20DTH at engine level, typically from 120–200k km. It shows up as a rattle from the front of the engine for a second or two on cold start, and eventually a chain or timing fault code. Where it's documented, the repair runs €900–€1,600 (chain, guides and tensioner at an independent, costs dated 2026-07), and it can be checked before you buy. 3 variants across 3 chassis in this database inherit it.
What happens
Symptom. A rattle from the front of the engine for a second or two on cold start, and eventually a chain or timing fault code.
Cause. The chain and its guides wear rather than lasting the life of the engine. Extended oil intervals and short-trip use bring it on sooner, and on a car of this value the repair is a large share of what it's worth.
How to check it
Cold start
Arrive to a stone-cold engine and listen through the first few seconds. A rattle that clears as oil pressure builds is the fault, and it should price the car.
You get one. If the engine is warm when you arrive, come back another day.
Every variant that carries this
| Variant | Chassis | Body | Years | Risk | Good buy | Cost as % of good buy |
|---|---|---|---|---|---|---|
| 2.0 CDTI A20DTH | A | hatchback | 2008–2017 | R3 | €1,750 | 71% |
| 2.0 CDTI A20DTH | A Sports Tourer | wagon | 2009–2017 | R3 | €1,850 | 68% |
| 2.0 CDTI A20DTH | J | hatchback | 2009–2015 | R3 | €1,400 | 89% |
The last column is the point. The same repair is an inconvenience on one variant and a reason to scrap the car on another. A failure costing a quarter of the vehicle's value changes the purchase decision regardless of how rare it is.