1.6 16V (K4M)
2007–2015 · petrol · 1598cc · 110hp
Engine codes: K4M
Reliability, common problems and owner reviews for the Renault Laguna III 1.6 16V (K4M). Check this before you buy used.
The 1.6 K4M is the simple, proven Renault petrol shared with Mégane/Clio/Dacia — dependable and cheap to run, but underpowered in a car the size of the Laguna. Belt-driven (change on schedule or it's an interference write-off), with ignition-coil and occasional coolant-temp-sensor niggles. Fine for gentle use; gutless when loaded.
Same engine, other cars
This is the same physical engine (K4M) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Belt-driven; snapped belt destroys valves. Change on schedule with water pump.
Fix / Workaround: Belt + water pump every ~5yr/100k km.
Repair cost: €300–€550
Typically appears after: 100,000 km
Ignition coils and coolant-temp sensor can cause rough running/fault lights.
Fix / Workaround: Replace coils; replace temp sensor.
Repair cost: €60–€300
Mileage Thresholds
After 100,000 km: Cam-belt service critical.
Pre-Purchase Checklist
- ☐Cam-belt history (interference engine)
- ☐Underpowered for the Laguna
- ☐Check for misfire codes
Frequently asked questions
Is the Renault Laguna III 1.6 16V (K4M) reliable?
Maint. Sensitive — The 1.6 K4M is the simple, proven Renault petrol shared with Mégane/Clio/Dacia — dependable and cheap to run, but underpowered in a car the size of the Laguna. Belt-driven (change on schedule or it's an interference write-off), with ignition-coil and occasional coolant-temp-sensor niggles. Fine for gentle use; gutless when loaded.
What are the common problems and reviews for the Renault Laguna III 1.6 16V (K4M)?
The most commonly reported problems: Cam belt (interference), Coil / sensor niggles.
Is a used Renault Laguna III 1.6 16V (K4M) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.