1.4 TSI Twincharger (BMY / CAVA)
2006–2010 · petrol · 1390cc · 140hp
Engine codes: BMY, CAVA, CAVB, CTHD
Reliability, common problems and owner reviews for the Volkswagen Touran 1.4 TSI Twincharger (BMY / CAVA). Check this before you buy used.
The 1.4 TSI Twincharger (supercharger + turbo, EA111) makes a heavy MPV feel brisk on little fuel — but it's one of VAG's riskier petrols. The timing-chain tensioner can fail and let the chain jump (catastrophic, bent valves), early pistons/rings could crack causing heavy oil consumption and misfires, and the supercharger clutch and HP pump add cost. A well-sorted, documented car with the revised chain tensioner can be fine, but an unknown-history one is a real gamble — many buyers prefer the simpler engines.
Same engine, other cars
This is the same physical engine (CAVA) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Early tensioner can fail → chain jumps → bent valves / wrecked engine.
Fix / Workaround: Confirm revised tensioner fitted; replace chain kit proactively; listen for rattle.
Repair cost: €600–€2500
Typically appears after: 100,000 km
Early pistons/rings could crack → heavy oil consumption, misfires, smoke.
Fix / Workaround: Compression test; revised pistons in repair; check oil use.
Repair cost: €800–€3000
Typically appears after: 90,000 km
Supercharger clutch and high-pressure pump add failure points/cost.
Fix / Workaround: Diagnose boost faults; replace components.
Repair cost: €300–€1200
Year Cutoffs
Mileage Thresholds
After 100,000 km: Chain + piston risk window.
Pre-Purchase Checklist
- ☐Listen for chain rattle; confirm revised tensioner
- ☐Compression test + oil-consumption check
- ☐Documented history essential — or pick a simpler engine
Frequently asked questions
Is the Volkswagen Touran 1.4 TSI Twincharger (BMY / CAVA) reliable?
Problematic — The 1.4 TSI Twincharger (supercharger + turbo, EA111) makes a heavy MPV feel brisk on little fuel — but it's one of VAG's riskier petrols. The timing-chain tensioner can fail and let the chain jump (catastrophic, bent valves), early pistons/rings could crack causing heavy oil consumption and misfires, and the supercharger clutch and HP pump add cost. A well-sorted, documented car with the revised chain tensioner can be fine, but an unknown-history one is a real gamble — many buyers prefer the simpler engines.
What are the common problems and reviews for the Volkswagen Touran 1.4 TSI Twincharger (BMY / CAVA)?
The most commonly reported problems: Timing-chain tensioner failure, Piston / ring failure (oil use), Supercharger clutch / HP pump.
Is a used Volkswagen Touran 1.4 TSI Twincharger (BMY / CAVA) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.