1.6 TDI 105hp (CAYC)

2009–2012 · diesel · 1598cc · 105hp

Engine codes: CAYC

Problematic

Reliability, common problems and owner reviews for the Audi A3 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 and labour-heavy, DPF clogs fast on short trips. Good motorway car; a money pit in the city.

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, usually 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, buried 5–6h labour); 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 codes
☐Ask if injectors replaced
☐DPF history

Frequently asked questions

Is the Audi A3 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 and labour-heavy, DPF clogs fast on short trips. Good motorway car; a money pit in the city.

What are the common problems and reviews for the Audi A3 1.6 TDI 105hp (CAYC)?

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

Is a used Audi A3 1.6 TDI 105hp (CAYC) worth buying?

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