1.6 16V (K4M)
2006–2012 · petrol · 1598cc · 105hp
Engine codes: K4M
Reliability, common problems and owner reviews for the Dacia Logan / Sandero 1.6 16V (K4M). Check this before you buy used.
The 16-valve K4M — more refined and more reliable than the 8v, and the better petrol choice; the LPG-converted ones are common and hold up well past 200,000 km. 'Reliable' is fair, but it has the family signature: the dephaser (variable-valve-timing) pulley rattles on cold start as it wears, a distinctive top-of-engine noise. Keep the timing belt kit on schedule (the idler/tensioner pulley, not just the belt, is the failure point that bends valves) and replace coil packs as they go, and it's a genuinely dependable, cheap-to-run engine.
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
The variable-valve-timing 'dephaser' pulley wears and rattles, heard from the top of the engine near the belts on cold start. The signature K4M fault.
Fix / Workaround: Replace the dephaser pulley (and solenoid) — best done with the timing belt.
Repair cost: €150–€400
Typically appears after: 120,000 km
Belt-driven interference engine. The idler/tensioner pulley can disintegrate and cause belt slack → valve-to-piston contact, so the whole kit matters.
Fix / Workaround: Belt + rollers/idler + tensioner + water pump on schedule.
Repair cost: €200–€450
Typically appears after: 90,000 km
Coil packs fail with age (misfire); valve-cover gasket can weep oil. Minor, cheap fixes.
Fix / Workaround: Replace coils/gasket as they fail.
Repair cost: €30–€200
Mileage Thresholds
After 120,000 km: Dephaser pulley rattle on cold start becomes likely.
After 250,000 km: Dependable with belt + dephaser care.
Fault Codes to Scan
Pre-Purchase Checklist
- ☐Cold-start: listen for a top-of-engine rattle (dephaser pulley)
- ☐Timing belt history — confirm rollers/idler + tensioner + water pump
- ☐Rule out a misfire (coil packs)
- ☐Better than the 8v; good LPG base
Frequently asked questions
Is the Dacia Logan / Sandero 1.6 16V (K4M) reliable?
Reliable — The 16-valve K4M — more refined and more reliable than the 8v, and the better petrol choice; the LPG-converted ones are common and hold up well past 200,000 km. 'Reliable' is fair, but it has the family signature: the dephaser (variable-valve-timing) pulley rattles on cold start as it wears, a distinctive top-of-engine noise. Keep the timing belt kit on schedule (the idler/tensioner pulley, not just the belt, is the failure point that bends valves) and replace coil packs as they go, and it's a genuinely dependable, cheap-to-run engine.
What are the common problems and reviews for the Dacia Logan / Sandero 1.6 16V (K4M)?
The most commonly reported problems: Dephaser (VVT) pulley rattle, Timing belt + idler pulley, Coil packs / valve-cover oil leak.
Is a used Dacia Logan / Sandero 1.6 16V (K4M) worth buying?
Minor issues only, easy to maintain, no design flaws. A safe used buy.