1.6 TDI 105hp (CAYC)

2009–2012 · diesel · 1598cc · 105hp

Engine codes: CAYC

Problematic

Reliability, common problems and owner reviews for the Seat Leon II 1.6 TDI 105hp (CAYC). Check this before you buy used.

Frugal common-rail 1.6 but expensive emissions hardware: injectors fail (~€1,800–2,500 a set), EGR buried, DPF clogs fast on short trips. Good only for motorway use.

Same engine, other cars

This is the same physical engine (CAYC) sold under different names across brands. Reliability is broadly shared — cross-check these:

Known Issues

Injector failurecritical

Injectors fail ~80,000–150,000 km as a set; need IMA coding.

Fix / Workaround: Replace all four (~€1,800–2,500) with IMA coding.

Repair cost: €1800–€2500

Typically appears after: 80,000 km

EGR / DPF cloggingrecurring

EGR clogs (P0402); DPF blocks on short trips.

Fix / Workaround: Motorway runs; clean/replace.

Repair cost: €300–€1500

Mileage Thresholds

After 120,000 km: Injector / EGR failures cluster.

Fault Codes to Scan

P0402EGR flow / cloggedrecurring

Pre-Purchase Checklist

☐Buy only if motorway-used
☐Scan for injector + P0402
☐DPF history

Frequently asked questions

Is the Seat Leon II 1.6 TDI 105hp (CAYC) reliable?

Problematic — Frugal common-rail 1.6 but expensive emissions hardware: injectors fail (~€1,800–2,500 a set), EGR buried, DPF clogs fast on short trips. Good only for motorway use.

What are the common problems and reviews for the Seat Leon II 1.6 TDI 105hp (CAYC)?

The most commonly reported problems: Injector failure, EGR / DPF clogging.

Is a used Seat Leon II 1.6 TDI 105hp (CAYC) worth buying?

Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.