Nissan Qashqai (J10 / J11)DPF Cleaning & Common Problems
Off-car cleaning for the Nissan Qashqai (J10 / J11) — inspected, deep-cleaned, flow-tested and returned with the before/after data. Trade and public welcome.
Service summary
- Engines covered
- K9K 1.5 dCi
- Emissions stage
- Euro 4 / Euro 5 / Euro 6
- DPF type
- Wall-flow ceramic DPF (Euro 5 on)
- Typical price
- from £130 trade · from £220 retail
- Turnaround
- Same day local drop-off · 48hr courier
- Get it to us
- Drop off at N18, courier, or collection
Normally cleanable
This family's DPF responds well to off-car cleaning when the core is sound.
Check your exact vehicle
The Qashqaiwas built with more than one engine and emissions setup. Enter your registration and we'll confirm the exact unit before anything is quoted.
Vehicle data from the DVSA MOT history service. We confirm the exact unit on inspection. Privacy
What we see on the Nissan Qashqai (J10 / J11)
Worth knowing about this model
- →Early J10 (Euro 4) cars mostly have no DPF; Euro 5/6 cars do — confirm with your registration.
- →The K9K appears across Renault, Nissan and Dacia models with identical patterns.
What commonly goes wrong on this engine
- ·The K9K's turbo oil-feed and pickup strainer are known to block with carbonised oil, starving and killing the turbo — the failing turbo then pumps oil into the exhaust and the DPF arrives oil-soaked.
- ·School-run duty cycles on Qashqais are the textbook failed-regeneration case: the 1.5 dCi rarely reaches sustained temperature, so soot loads through repeated aborted regens.
- ·Worn K9K injectors raise soot output well before they set their own fault codes — a soot-heavy filter with no other codes still needs injector spray patterns checked.
Faults that look like a blocked DPF but aren't
- ·A failing turbo losing boost reads as limp mode before the DPF is genuinely full
Check these before removing the filter
- ·Check turbo condition and oil-feed cleanliness before attributing the fault to the DPF
- ·Review regeneration history — frequent aborted regens point to duty cycle, not filter failure
When cleaning won't fix it
- ·Oil-soaked core where the turbo/oil-supply fault has not been repaired
- ·Cracked or melted core
General diesel causes (shared across engines)
- ·EGR valve sticking
- ·Differential-pressure sensor faults
- ·Failed glow plugs weakening regeneration
Mistakes we see garages make
- ·Cleaning or replacing the DPF on a K9K without checking turbo oil supply — the K9K's documented oil-starvation turbo failures are what soak many of these filters in the first place.
Test evidence
Every unit is flow- and pressure-tested before and after cleaning. You get the readings, photo evidence and a completion certificate with the unit — proof for you and your customer, not marketing numbers.