1.6 TDI (CAYB/CAYC)
2009–2014 · diesel · 1598cc · 90hp
Engine codes: CAYB, CAYC
Reliability, common problems and owner reviews for the Volkswagen Polo 1.6 TDI (CAYB/CAYC). Check this before you buy used.
The common-rail 1.6 TDI — frugal but the emissions hardware is the weak point: very common EGR valve failures and a DPF that needs regeneration every 100–200 miles, so it's a poor fit for short journeys or under ~15k miles/year. Injectors also fail expensively. Buy only as a motorway car.
Same engine, other cars
This is the same physical engine (CAYC) sold under different names across brands. Reliability is broadly shared — cross-check these:
- Škoda Rapid— 1.6 TDI (CAYC / CLNA)105hp
- Škoda Octavia II— 1.6 TDI 105hp (CAYC)105hp
- Audi A1— 1.6 TDI (CAYB / CAYC)105hp
- Škoda Superb II— 1.6 TDI 105hp (CAYC)105hp
- Volkswagen Golf VI— 1.6 TDI 105hp (CAYC)105hp
- Volkswagen Passat B7— 1.6 TDI (CAYC)105hp
- Volkswagen Touran— 1.6 TDI 105hp (CAYC)105hp
- Škoda Fabia II— 1.6 TDI (CAYB/CAYC)90hp
- Seat Toledo IV— 1.6 TDI (CAYC / CLNA)105hp
- Audi A3— 1.6 TDI 105hp (CAYC)105hp
- Seat Ibiza— 1.6 TDI (CAYB/CAYC, EA189)90hp
- Seat Leon II— 1.6 TDI 105hp (CAYC)105hp
- Volkswagen Golf VI— 1.6 TDI 90hp (CAYB)90hp
Known Issues
EGR valve failures are extremely common on this engine → limp mode, rough running.
Fix / Workaround: Replace/clean EGR; budget for it.
Repair cost: €200–€700
Typically appears after: 100,000 km
DPF needs frequent regeneration; short/low-mileage use clogs it.
Fix / Workaround: Regular motorway runs; clean/replace.
Repair cost: €300–€1200
Typically appears after: 100,000 km
Injectors fail as a set (IMA coding needed).
Fix / Workaround: Replace set with IMA coding.
Repair cost: €1500–€2500
Typically appears after: 120,000 km
Mileage Thresholds
After 100,000 km: EGR/DPF/injector issues cluster.
Fault Codes to Scan
Pre-Purchase Checklist
- ☐Buy only if you do >15k miles/yr mostly motorway
- ☐Scan for EGR (P0402) + injector codes
- ☐DPF history
- ☐Prefer petrol for city use
Frequently asked questions
Is the Volkswagen Polo 1.6 TDI (CAYB/CAYC) reliable?
Problematic — The common-rail 1.6 TDI — frugal but the emissions hardware is the weak point: very common EGR valve failures and a DPF that needs regeneration every 100–200 miles, so it's a poor fit for short journeys or under ~15k miles/year. Injectors also fail expensively. Buy only as a motorway car.
What are the common problems and reviews for the Volkswagen Polo 1.6 TDI (CAYB/CAYC)?
The most commonly reported problems: EGR valve failure, DPF clogging (short trips), Injector failure.
Is a used Volkswagen Polo 1.6 TDI (CAYB/CAYC) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.