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2.0 TDI 140hp (CBAB / CBDB → CFFB / CJAA)

2008–2012 · diesel · 1968cc · 140hp

Engine codes: CBAA, CBAB, CBDB, CFFB, CFGB, CFHC, CJAA, CLCB

History-Dependent

Reliability, common problems and owner reviews for the Seat Leon II 2.0 TDI 140hp (CBAB / CBDB → CFFB / CJAA). Check this before you buy used.

The default Golf VI diesel and an excellent engine once past one critical caveat: early common-rail builds have an oil-pump/balance-shaft hex-drive that can wear round and destroy the engine. The exact cutoff is known — CBAB built BEFORE 19.10.2009 used the failure-prone 77mm hex; AFTER that date (and on CFFB/CJAA) VW fitted a 100mm shaft and the problem is solved. A post-fix car is one of the best used diesels; a pre-fix unverified one is a gamble.

Same engine, other cars

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

Known Issues

Oil pump / balance shaft hex drive failure (early builds)critical

Torsional vibration from the balance shaft rounds off the 6mm (77mm-long) hex drive to the oil pump. Oil pressure collapses; the engine is usually destroyed. Fails typically 95,000–160,000 km. Affected CBAB built before 19.10.2009.

Fix / Workaround: Verify build date / that the revised 100mm oil-pump drive shaft (or modified balance shaft) was fitted (~€200–215). Metallic rattle at idle or any oil-pressure light = stop immediately.

Repair cost: €200–€3500

Typically appears after: 95,000 km

DPF cloggingrecurring

DPF blocks on short trips; failed regens need dealer regen / cleaning.

Fix / Workaround: Regular hot motorway runs; clean/replace if blocked.

Repair cost: €200–€1200

Typically appears after: 130,000 km

EGR carbonrecurring

EGR clogs with soot → rough running / limp mode.

Fix / Workaround: Deep-clean EGR.

Repair cost: €150–€400

Cooling fan controllerminor

Faulty fan controller can leave the fan running, draining the battery / burning out the fan.

Fix / Workaround: Replace controller if fan won't switch off.

Repair cost: €80–€300

Oil pump / balance shaft hex drive (early builds)critical

Balance-shaft vibration rounds off the 77mm hex drive to the oil pump → oil pressure collapse → engine destroyed (typ. 95,000–160,000 km). Affected CBAB before 19.10.2009.

Fix / Workaround: Verify build date / that the revised 100mm oil-pump shaft was fitted (~€200). Metallic idle rattle or any oil-pressure light = stop immediately.

Repair cost: €200–€3500

Typically appears after: 95,000 km

Oil pump / balance shaft hex (early builds)critical

77mm hex drive rounds off → oil pressure collapse → engine destroyed (95,000–160,000 km). Affected CBAB before 19.10.2009.

Fix / Workaround: Verify build date / revised 100mm shaft fitted (~€200). Idle rattle or oil light = stop.

Repair cost: €200–€3500

Typically appears after: 95,000 km

DPF / EGR cloggingrecurring

DPF blocks on short trips; EGR clogs.

Fix / Workaround: Motorway runs; clean/replace.

Repair cost: €200–€1200

Typically appears after: 130,000 km

Oil pump hex (early builds)critical

CBAB before 19.10.2009 has the 77mm oil-pump hex failure (fixed 100mm after).

Fix / Workaround: Verify build date / revised shaft; idle rattle = stop.

Repair cost: €200–€3500

Typically appears after: 95,000 km

Year Cutoffs

2009: Before — CBAB before 19.10.2009: 77mm oil-pump hex — failure-prone. After — After 19.10.2009 / CFFB / CJAA: 100mm oil-pump shaft — fixed.

Mileage Thresholds

After 95,000 km: Oil-pump hex failure window on pre-fix builds.

After 130,000 km: DPF/EGR attention typically due.

Pre-Purchase Checklist

  • ☐CRITICAL: establish build date — before/after 19.10.2009 oil-pump fix
  • ☐Prefer CFFB/CJAA or any post-Oct-2009 build
  • ☐Confirm whether the revised oil-pump shaft was retrofitted on early cars
  • ☐Idle: listen for metallic rattle (oil-pump drive)
  • ☐Check DPF/EGR history; prefer a motorway-used car
  • ☐DSG6 (DQ250 wet): confirm fluid changes
  • ☐Prefer CFHC or any post-Oct-2009 build
  • ☐Confirm revised oil-pump shaft on early cars
  • ☐Idle: metallic rattle check (oil-pump drive)
  • ☐Check DPF/EGR history; prefer motorway-used car
  • ☐CRITICAL: build date before/after 19.10.2009
  • ☐Prefer CFFB or post-Oct-2009
  • ☐Idle metallic rattle check
  • ☐DPF/EGR history
  • ☐Much better than the PD BKP
  • ☐Build date before/after 19.10.2009
  • ☐DPF/EGR + AdBlue history
  • ☐The sensible Tiguan engine

Frequently asked questions

Is the Seat Leon II 2.0 TDI 140hp (CBAB / CBDB → CFFB / CJAA) reliable?

History-Dependent — The default Golf VI diesel and an excellent engine once past one critical caveat: early common-rail builds have an oil-pump/balance-shaft hex-drive that can wear round and destroy the engine. The exact cutoff is known — CBAB built BEFORE 19.10.2009 used the failure-prone 77mm hex; AFTER that date (and on CFFB/CJAA) VW fitted a 100mm shaft and the problem is solved. A post-fix car is one of the best used diesels; a pre-fix unverified one is a gamble.

What are the common problems and reviews for the Seat Leon II 2.0 TDI 140hp (CBAB / CBDB → CFFB / CJAA)?

The most commonly reported problems: Oil pump / balance shaft hex drive failure (early builds), DPF clogging, EGR carbon, Cooling fan controller, Oil pump / balance shaft hex drive (early builds), Oil pump / balance shaft hex (early builds), DPF / EGR clogging, Oil pump hex (early builds).

Is a used Seat Leon II 2.0 TDI 140hp (CBAB / CBDB → CFFB / CJAA) worth buying?

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