Car Model Guide/ Renault/ Mégane/ III/ 1.5 dCi
Renault·Mégane·III hatchback

1.5 dCi K9K

The most-produced small diesel in Europe, shared across Renault, Nissan and Dacia. It's absurdly economical and cheap to fix, and injector wear is the fault that defines it, with a leaking injector able to wash a bore.

Overview

The 1.5 dCi is the K9K diesel version of the Renault Mégane hatchback (III), sold 2008–2016 with 110 PS and manual or automatic. Demands diligence at level 3. Injector wear is the defining fault, and a leaking injector can wash a bore. The interior electronics are the other recurring cost. 5 failure modes are recorded against its engine, gearbox, chassis and shared components. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

Renault Mégane hatchback (III)

Renault Mégane hatchback (III) · photo Renault Megane 5-Door (MIAS '10) by Bull-Doser · Public domain · Wikimedia Commons

Power110 PS
Torque240 Nm
Years2008–2016
Fueldiesel
DriveFWD
EnginesK9K
Biggest risks

Ranked by probability × repair cost. 5 recorded in total.

52Demands diligence
  1. DPF clogging and forced regeneration€250–€1,800partly checkable
  2. Injector wear and bore washing€400–€1,200partly checkable
  3. DQ250 wet-clutch DSG mechatronic and service neglect€700–€1,500partly checkable

Risk level −22 · Likely spend vs price −26 · all issues →

System by system9 systems reviewed · 5 with no recurring fault reported
Engine✓ clearNo recurring fault reported for this system on this engine.
Fuel systemwatchInjector wear and bore washing, €400–€1,200.
Intake & air✓ clearNo recurring fault reported for this system on this engine.
Cooling✓ clearNo recurring fault reported for this system on this engine.
Emissions⚠ attentionDPF clogging and forced regeneration, €250–€1,800.+1 more in this system
TransmissionwatchDQ250 wet-clutch DSG mechatronic and service neglect, €700–€1,500.
ElectricswatchKey card and ignition electronics faults, €150–€600.
Suspension & brakes✓ clearNo recurring fault reported for this system on this engine.
Body & interior✓ clearNo recurring fault reported for this system on this engine.

Pre-facelift or facelift, this engine spans both

The same badge either side of the changeover. Bands are split at the facelift year from the generation record.

PhaseYearsLowAverageHighGood buyWhat differs
pre Pre-facelift2008–2013€800€1,400€2,400€1,100The specification the car launched with.
LCI Facelift (LCI)2014–2016€850€1,550€2,600€1,200New nose and lights; Revised engines and infotainment

Known issues, ranked by expected cost

Faults recorded against this engine, its components and its chassis, ranked by likelihood × repair cost. Costs are indicative ranges with a stated labour basis.

DPF clogging and forced regenerationDPF€250–€1,800
Warning light, limp mode, oil level rising above the maximum mark from fuel dilution. The filter needs sustained hot running to regenerate. A car used for short urban trips never completes a regeneration cycle.
Check: Read the DPF soot load and the distance since the last regeneration on a scan tool, and check the engine oil level and smell it for diesel. Ask what the car was used for. A short-trip city diesel is the wrong car regardless of mileage.
EmissionscommonPartly detectableevidence: documented120–250k km
Injector wear and bore washingK9K 1.5 dCi€400–€1,200
A rough idle, smoke on start-up, uneven running and in the worst case low compression on one cylinder. The injectors wear and can leak, letting combustion gases and fuel past the seat. Left alone, fuel washes the oil film off the bore and damages it, which turns an injector job into an engine one.
Check: Read the injector correction values on a diagnostic and look for one cylinder out of line with the rest. Ask what injector work has been done, because most high-mileage examples have had some.
FuelcommonPartly detectableevidence: documented130–230k km
DQ250 wet-clutch DSG mechatronic and service neglectVW group DQ250 six-speed wet-clutch DSG€700–€1,500
Jerky or harsh shifts, clutch flare or judder, an occasional drop to neutral or limp mode, and gearbox fault codes. Mechatronic valve-body and pressure-accumulator faults, aggravated by a missed 60,000 km oil-and-filter service. The wet six-speed is the more durable of the DSGs but not maintenance-free.
Check: Confirm the DSG oil-and-filter history, test-drive for harsh or flaring shifts at low speed and under load, and scan for gearbox faults.
TransmissionoccasionalPartly detectableevidence: documented80–160k km
Key card and ignition electronics faultsIII body€150–€600
The car failing to recognise the key card, a no-start with the dashboard lit, or an intermittent immobiliser warning. The card reader and the ignition electronics wear, and the cards themselves fail with age. It's rarely expensive to put right, but it strands the car when it happens, which is what gives it its reputation.
Check: Start the car several times with both cards if two exist, and treat a seller who can only produce one working card as telling you something.
ElectricalcommonDetectable at viewingevidence: documented90–180k km
EGR cooler leakEGR cooler€400–€1,000
Coolant loss with no visible external leak, white smoke, sweet smell. The EGR cooler cracks internally and leaks coolant into the intake. BMW recalled affected diesels over a fire risk from glycol deposits igniting.
Check: Check coolant level and look for unexplained top-ups in the service history. Verify the recall was carried out. It's free and searchable by VIN.
EmissionsoccasionalPartly detectableevidence: manufacturer120–250k km

Ranked by probability × repair cost, not by how loudly a failure is discussed. Inherited from the engine, gearbox, chassis and shared components, each written once.

Pre-purchase inspection

The same issue records, reordered into the sequence you can actually check them in: cold start, static, drive, paperwork.

5 checks · saved in this browser ·

1Cold startYou get one. If the engine is warm when you arrive, come back another day.

2On the driveInclude low-speed manoeuvring, not just an open road.

3PaperworkOn these cars the folder is most of the value.

4OBD scanMandatory. A seller who refuses a scan has answered the question.

Mileage and servicing

What the odometer does and doesn't tell you here, plus the service items whose neglect causes the expensive failures above.

Read the injector correction values on a scan and test every electrical function, since those are where the faults are.

Service itemIntervalCost
Injectors
The defining fault, and it can damage a bore
scan the correction values€400–1,200
Key card and electronics
Where the faults concentrate on this car
test every function€150–600
Engine oil
Injector and turbo life follow oil quality
on time, correct spec€80–120

What to pay

What this engine sells for, against the median of every engine in the chassis. All figures are illustrative placeholders. See the basis chips.

Enter an asking price to get a verdict against this variant's band: cheap, fair, good buy or overpriced.

United States vs Europe

1 EUR = 1.08 USD ·
🇪🇺 Europe · EUR€1,100band €800–€2,600
🇺🇸 United StatesNot sold1.5 dCi K9K was never a US-market car
What that meansNo US band exists to compare. Any car you find there's a private import, parts and specialist knowledge are thinner, and the price says more about import cost than about the market.

US figures are the EU band converted at a stated rate. No US market differential is modelled: we hold no sourced US asking prices, and inventing one would be worse than saying so. What the comparison does show for real is availability. Most of this range was never sold in the US.

  • ModelRenault Mégane 1.5 dCi
  • ChassisIII
  • EngineK9K
  • Years2008–2016
  • MarketCentral EU
  • Windowrolling 12 months to 2026-07
€1k€2kIII median, all 2 engines €1,400Pre-faceliftPre-facelift: low €800, good buy €1,100, average €1,400, high €2,400€1,400€800€2,400€1,100Facelift (LCI)Facelift (LCI): low €850, good buy €1,200, average €1,550, high €2,600€1,550€850€2,600€1,200
Good buy at or under the marker · Median asking price · bar spans the 10th to 90th percentile · dashed line is the iii median, all 2 engines

Good buy isn't the same as cheapest. The good-buy figure assumes the known failure items are either done with receipts or verifiably not yet due. Full breakdown by facelift phase →

Buyer notes

Our judgement, kept separate from the records it's built on.

Our read, not a record
The 1.5 dCi Mégane is one of the cheapest cars to run in this database, and the engine is shared with millions of Nissans, so parts and knowledge are everywhere. Two things need checking. Injector wear is the engine's defining fault and a leaking one can damage a bore, so have the correction values read. Then the electronics, because the key card system and the interior modules are where Renault's reputation was earned. Scan everything and buy the documented car.

Everything above this line comes from the issue and specification records. This paragraph is our judgement on top of them. See how we reach it.

Full specification

Manufacturer figures for this engine and body, as recorded in the variant and engine data.

Engine codeK9K 1.5 dCi
ConfigurationI4, turbocharged · 1461 cc
Fuel / injectiondiesel · common rail
Model years2008–2016
Facelift phaseSold either side of the 2014 facelift, 2008–2013 pre, 2014–2016 LCI
Power / torque110 PS · 240 Nm
Transmissions6-speed manual · 6-speed wet-clutch DSG/S tronic
Gearbox familiesVW group DQ250 six-speed wet-clutch DSG
DrivetrainFWD
Economy (real-world)4.2–5.5 l/100 km mixed
MarketsEU