1.5 dCi (K9K)

2007–2015 · diesel · 1461cc · 110hp

Engine codes: K9K

Maint. Sensitive

Reliability, common problems and owner reviews for the Renault Laguna III 1.5 dCi (K9K). Check this before you buy used.

The 1.5 dCi (K9K) — economical but a little under-engined for the Laguna, and carrying the usual K9K watch-list: injector wear, turbo failure on oil neglect, EGR/DPF clogging. Best for high-mileage motorway drivers; the 2.0 dCi is the better-matched Laguna diesel.

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

Injector wearrecurring

Worn injectors → hard start, smoke, rough running.

Fix / Workaround: Injector test; recon/replace.

Repair cost: €200–€900

Typically appears after: 150,000 km

Turbo / EGR / DPFcritical

Turbo fails on oil neglect; EGR/DPF clog on short trips.

Fix / Workaround: Strict low-ash oil; motorway regens; clean EGR.

Repair cost: €300–€1100

Typically appears after: 150,000 km

Mileage Thresholds

After 150,000 km: Injector/turbo window.

Pre-Purchase Checklist

☐Oil-change history (low-ash C3)
☐Cold-start smoke = injectors
☐Underpowered — prefer 2.0 dCi

Frequently asked questions

Is the Renault Laguna III 1.5 dCi (K9K) reliable?

Maint. Sensitive — The 1.5 dCi (K9K) — economical but a little under-engined for the Laguna, and carrying the usual K9K watch-list: injector wear, turbo failure on oil neglect, EGR/DPF clogging. Best for high-mileage motorway drivers; the 2.0 dCi is the better-matched Laguna diesel.

What are the common problems and reviews for the Renault Laguna III 1.5 dCi (K9K)?

The most commonly reported problems: Injector wear, Turbo / EGR / DPF.

Is a used Renault Laguna III 1.5 dCi (K9K) worth buying?

Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.