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2.0 TDI (BLB/BRE PD → CAGB CR)

2004–2011 · diesel · 1968cc · 140hp

Engine codes: BLB, BRE, CAGB

History-Dependent

Reliability, common problems and owner reviews for the Audi A6 C6 2.0 TDI (BLB/BRE PD → CAGB CR). Check this before you buy used.

Verdict depends entirely on which version. The early PD (BLB/BRE, 2004–2008) is longitudinal and carries the serious oil-pump/balance-shaft hex risk plus Siemens-injector troubles — avoid unverified. The later common-rail CAGB (2008–2011) is fundamentally robust and, with a manual gearbox, easily exceeds 250,000 km. Always avoid the Multitronic CVT.

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

Oil pump hex / injectors (PD, pre-2008)critical

Early PD (BLB/BRE) has the longitudinal oil-pump/balance-shaft hex failure + Siemens injector troubles.

Fix / Workaround: Prefer the CAGB common-rail; on PD verify oil-pump fix; idle rattle = stop.

Repair cost: €250–€3500

Typically appears after: 100,000 km

Multitronic CVT weaknesscritical

The Multitronic CVT auto is a significant weak point regardless of engine.

Fix / Workaround: Choose a manual gearbox.

Repair cost: €1000–€3500

DPF / EGR (CR)recurring

DPF/EGR clog on short trips.

Fix / Workaround: Motorway runs; clean/replace.

Repair cost: €200–€1000

Year Cutoffs

2008: Before — PD BLB/BRE — oil-pump hex + injector risk. After — Common-rail CAGB — robust.

Mileage Thresholds

After 100,000 km: PD oil-pump risk; CR more durable.

Pre-Purchase Checklist

  • ☐Prefer the CAGB common-rail (2008+)
  • ☐AVOID the Multitronic CVT — choose manual
  • ☐PD: verify oil-pump fix; idle rattle check

Frequently asked questions

Is the Audi A6 C6 2.0 TDI (BLB/BRE PD → CAGB CR) reliable?

History-Dependent — Verdict depends entirely on which version. The early PD (BLB/BRE, 2004–2008) is longitudinal and carries the serious oil-pump/balance-shaft hex risk plus Siemens-injector troubles — avoid unverified. The later common-rail CAGB (2008–2011) is fundamentally robust and, with a manual gearbox, easily exceeds 250,000 km. Always avoid the Multitronic CVT.

What are the common problems and reviews for the Audi A6 C6 2.0 TDI (BLB/BRE PD → CAGB CR)?

The most commonly reported problems: Oil pump hex / injectors (PD, pre-2008), Multitronic CVT weakness, DPF / EGR (CR).

Is a used Audi A6 C6 2.0 TDI (BLB/BRE PD → CAGB CR) worth buying?

The engine itself is OK; condition is everything. Unknown or patchy history = walk away.