2.0 TDI (CAGA/CJCA, common rail)
2008–2015 · diesel · 1968cc · 143hp
Engine codes: CAGA, CJCA, CAGB
Reliability, common problems and owner reviews for the Audi A4 B8 2.0 TDI (CAGA/CJCA, common rail). Check this before you buy used.
The common-rail 2.0 TDI — well-regarded for longevity when serviced, and the later (2011+) units are especially solid. The early-build caveat is the oil-pump/balance-shaft hex (pre-Oct-2009 builds, as across the EA189 range); otherwise watch DPF/EGR on short trips. A strong, sensible diesel.
Same engine, other cars
This is the same physical engine (CAGA) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Earliest common-rail builds share the 77mm oil-pump hex risk (fixed to 100mm from ~Oct 2009).
Fix / Workaround: Check build date; verify revised shaft; idle rattle = stop.
Repair cost: €200–€3000
Typically appears after: 100,000 km
DPF blocks on short trips; EGR clogs.
Fix / Workaround: Motorway runs; clean/replace.
Repair cost: €200–€1000
Typically appears after: 150,000 km
Year Cutoffs
Mileage Thresholds
After 150,000 km: DPF/EGR attention.
Pre-Purchase Checklist
- ☐Prefer 2011+ builds
- ☐Early cars: verify oil-pump shaft
- ☐DPF/EGR history; prefer motorway use
Frequently asked questions
Is the Audi A4 B8 2.0 TDI (CAGA/CJCA, common rail) reliable?
Maint. Sensitive — The common-rail 2.0 TDI — well-regarded for longevity when serviced, and the later (2011+) units are especially solid. The early-build caveat is the oil-pump/balance-shaft hex (pre-Oct-2009 builds, as across the EA189 range); otherwise watch DPF/EGR on short trips. A strong, sensible diesel.
What are the common problems and reviews for the Audi A4 B8 2.0 TDI (CAGA/CJCA, common rail)?
The most commonly reported problems: Oil pump hex (early 2008–2009 builds), DPF / EGR clogging.
Is a used Audi A4 B8 2.0 TDI (CAGA/CJCA, common rail) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.