1.5 dCi (K9K)
2012–2019 · diesel · 1461cc · 90hp
Engine codes: K9K
Reliability, common problems and owner reviews for the Renault Clio IV 1.5 dCi (K9K). Check this before you buy used.
The 1.5 dCi (K9K — the most widely-used small diesel in Europe, shared across the entire Renault-Nissan-Dacia range) makes the Clio IV a genuinely frugal long-hauler. It's a proven high-mileage engine but carries the K9K cautions: injector wear (the classic dCi item), turbo oil-feed and DPF/EGR on the DPF cars, plus the timing belt (do it on schedule). With clean fuel, an on-time belt and a healthy injector set it's a dependable, very economical engine — one of the most familiar diesels on the road. Buy on belt and injector history.
Same engine, other cars
This is the same physical engine (K9K) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Worn injectors → hard start, smoke, rough running.
Fix / Workaround: Injector test; recon/replace.
Repair cost: €200–€900
Typically appears after: 150,000 km
Turbo fails on oil neglect; EGR/DPF clog on short trips.
Fix / Workaround: Strict oil; motorway regens; clean EGR.
Repair cost: €300–€1100
Typically appears after: 150,000 km
K9K injectors wear → rough running, smoke. Classic dCi item.
Fix / Workaround: Injector test/recon; clean fuel.
Repair cost: €250–€1100
Typically appears after: 140,000 km
Belt-driven (do on schedule); turbo oil-feed and DPF on later cars.
Fix / Workaround: Belt per schedule; check turbo feed; motorway regens.
Repair cost: €250–€1000
Typically appears after: 130,000 km
Mileage Thresholds
After 150,000 km: Injector/turbo window.
After 220,000 km: High-mileage capable with belt + injector care.
Pre-Purchase Checklist
- ☐Oil-change history
- ☐Cold-start smoke = injectors
- ☐The sensible workhorse choice
- ☐Same K9K as Clio / Qashqai / Micra
- ☐Timing belt on schedule
- ☐Injector history
- ☐Cold-start smoke check
- ☐Only worth it for high annual mileage
- ☐High-mileage choice only
- ☐EDC health if fitted
- ☐Same K9K as Captur / Mégane / Qashqai
- ☐DPF history (delivery vans)
Frequently asked questions
Is the Renault Clio IV 1.5 dCi (K9K) reliable?
Maint. Sensitive — The 1.5 dCi (K9K — the most widely-used small diesel in Europe, shared across the entire Renault-Nissan-Dacia range) makes the Clio IV a genuinely frugal long-hauler. It's a proven high-mileage engine but carries the K9K cautions: injector wear (the classic dCi item), turbo oil-feed and DPF/EGR on the DPF cars, plus the timing belt (do it on schedule). With clean fuel, an on-time belt and a healthy injector set it's a dependable, very economical engine — one of the most familiar diesels on the road. Buy on belt and injector history.
What are the common problems and reviews for the Renault Clio IV 1.5 dCi (K9K)?
The most commonly reported problems: Injector wear, Turbo / EGR / DPF, Injector wear (dCi), Timing belt / turbo / DPF.
Is a used Renault Clio IV 1.5 dCi (K9K) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.