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Renault Megane: K4M/F4R Petrol Ignition Coil Pack Failure

K4M/F4R Petrol Ignition Coil Pack Failure is a common electrical fault on the Renault Megane on the 2002–2016 cars, and we rate it major. Putting it right costs ≈A$120 to ≈A$600 at independent workshop rates, shown as an approximate guide in Australian dollars. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 27 documented faults on the Renault Megane.

Vehicle
Renault Megane
Engine
2.0L
Years
2002–2016
Fuel
petrol
System
Electrical

This page covers the Renault Megane as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Renault Megane faults27 documented faults on this model

What you are looking at

A four-cylinder ignition coil rail removed from an engine, beside a steel rule for scale.Example of the part — not this vehicle

A coil-on-plug ignition rail, removed. One coil per cylinder.

Cschirp · CC BY-SA 3.0 de · Wikimedia Commons

What goes wrong

Both the K4M 1.6 and F4R 2.0 petrol engines use individual coil-on-plug ignition coils that are documented to fail prematurely. Failure is often triggered by oil or water ingress into the spark plug wells when the rubber plug well seals deteriorate. Coils fail intermittently under load before failing completely, and multiple coils frequently fail in sequence. The failure causes cylinder misfires, rough idle, and can damage the catalytic converter if unaddressed.

What you would notice

  • Engine misfire on one or more cylinders
  • Rough idle with vibration through the car
  • Loss of power particularly under load
  • Check engine light with P030X misfire codes

How to check it

Where to look. Top of engine, one coil per spark plug

  1. Scan for P0300-P0304 misfire codes and identify which cylinder is affected.

  2. Test coil resistance or swap suspected coils between cylinders to confirm.

  3. Check valve cover gasket where the plug wells pass through the head — oil leaks here saturate coil bases.

  4. If a workshop inspection is possible: Remove the ignition coil for that cylinder and inspect the spark plug well for oil or water contamination.

Parts involved: Ignition coil.

What it costs to put right

≈A$120 to ≈A$600 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Has a check engine light related to misfires appeared?”
  • “Have the ignition coils been replaced, and at what mileage?”

Now check the Renault Megane you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car still has money owing on it, has been written off or reported stolen, what kms it showed in past sale ads, whether it has had accident repair claims and what it is worth today. That comes from the official records for that plate. Enter the plate and its state for the A$17.90 Vehicle Check, or the full history from A$24.99.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Renault Megane buyer questions

Is k4m/f4r petrol ignition coil pack failure serious on a Renault Megane?

We rate it major and common on the Renault Megane. Both the K4M 1.6 and F4R 2.0 petrol engines use individual coil-on-plug ignition coils that are documented to fail prematurely. Failure is often triggered by oil or water ingress into the spark plug wells when the rubber plug well seals deteriorate. Coils fail intermittently under load before failing completely, and multiple coils frequently fail in sequence. The failure causes cylinder misfires, rough idle, and can damage the catalytic converter if unaddressed.

How much does it cost to fix on a Renault Megane?

≈A$120 to ≈A$600 at independent workshop rates, shown as an approximate guide in Australian dollars. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Renault Megane years are affected?

Our research records this fault on the 2002–2016 Renault Megane. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Scan for P0300-P0304 misfire codes and identify which cylinder is affected. Test coil resistance or swap suspected coils between cylinders to confirm. Check valve cover gasket where the plug wells pass through the head — oil leaks here saturate coil bases. If a workshop inspection is possible: Remove the ignition coil for that cylinder and inspect the spark plug well for oil or water contamination. Look here: Top of engine, one coil per spark plug