1.6 TDCi (DV6)
2004–2010 · diesel · 1560cc · 109hp
Engine codes: 9HP, 9HR, 9HX, 9HZ, DV6, G8DA, HHDA
Reliability, common problems and owner reviews for the Peugeot 407 1.6 TDCi (DV6). Check this before you buy used.
The 1.6 HDi (DV6) — economical but underpowered for a car the size of the C5, and prone to turbo oil starvation: the narrow oil-feed pipe carbons up if oil changes are delayed or the wrong oil used, seizing the turbo. DPF clogs on short urban trips. The dipstick-tube quirk (plastic tip snapping into the sump) carries over too. Only sensible with strict oil discipline and motorway use — the 2.0 HDi is the far better C5 diesel.
Same engine, other cars
This is the same physical engine (9HP) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Copper injector washers degrade → carbon in oil → blocked turbo oil-feed gauze → oil pressure to turbo drops (to ~0.8 bar) → turbo bearing failure.
Fix / Workaround: Replace injector seals; clean/replace the turbo oil-feed banjo + gauze; strict oil changes. Verify done.
Repair cost: €300–€1200
Typically appears after: 100,000 km
Turbo fails (loss of power, blue smoke, whine) — often a consequence of the oil-feed issue.
Fix / Workaround: Replace turbo (~£800) AND fix the oil-feed cause.
Repair cost: €600–€1200
Typically appears after: 120,000 km
DPF blocks on short trips.
Fix / Workaround: Motorway runs; clean/replace.
Repair cost: €300–€1000
Narrow turbo oil-feed pipe carbons up on neglect → turbo seizure.
Fix / Workaround: Strict oil changes; clean/replace oil feed; verify turbo.
Repair cost: €400–€1200
Typically appears after: 100,000 km
Mileage Thresholds
After 100,000 km: Injector-seal/turbo-feed failure chain risk.
Pre-Purchase Checklist
- ☐Ask about injector seal + turbo oil-feed banjo service
- ☐Buy only if motorway-used with clean oil history
- ☐Check for turbo whine / blue smoke
- ☐Prefer the 2.0 TDCi
- ☐Strict oil-change history (turbo feed)
- ☐Underpowered — prefer the 2.0 HDi
- ☐DPF history
- ☐Ask about injector seal + turbo oil-feed service
- ☐Buy only if motorway-used
- ☐Prefer the 2.0 HDi
- ☐Check turbo on test drive
- ☐Underpowered in the C5 — prefer the 2.0 HDi
- ☐Injector seal + turbo oil-feed history
- ☐Check turbo whine/smoke
- ☐Underpowered — prefer 2.0 HDi
Frequently asked questions
Is the Peugeot 407 1.6 TDCi (DV6) reliable?
Problematic — The 1.6 HDi (DV6) — economical but underpowered for a car the size of the C5, and prone to turbo oil starvation: the narrow oil-feed pipe carbons up if oil changes are delayed or the wrong oil used, seizing the turbo. DPF clogs on short urban trips. The dipstick-tube quirk (plastic tip snapping into the sump) carries over too. Only sensible with strict oil discipline and motorway use — the 2.0 HDi is the far better C5 diesel.
What are the common problems and reviews for the Peugeot 407 1.6 TDCi (DV6)?
The most commonly reported problems: Injector seal → turbo oil starvation, Turbo failure, DPF clogging, Turbo oil starvation (narrow feed).
Is a used Peugeot 407 1.6 TDCi (DV6) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.