Renault Clio Mk3 1.5 dCi 86bhp — Injector Return Pipe Failure
The K9K 1.5 dCi in the Clio Mk3 has a known failure on the injector fuel return pipes. The plastic fittings crack and cause a fuel leak — a fire risk that must be addressed immediately.
Severity
SevereDIY Difficulty
Easy
Est. Cost
£30–£150
OBD Codes
P0087P0093Injectors
Typical layout and location for the Injectors assembly.
Symptoms
- Strong diesel smell in engine bay, especially after running
- Visible fuel staining around injectors
- Difficulty starting when hot (fuel returning to tank)
- Lumpy running
- Engine bay fire risk if unaddressed
Root Cause
The plastic clip-on return pipe connections to the injectors become brittle with heat cycling and age. They develop hairline cracks that worsen over time. The pipes carry low-pressure return fuel but the fuel is hot and the leak is a serious fire risk.
How To Fix
- Inspect all injector return pipe connections immediately on any high-mileage K9K
- Purchase the Renault injector return pipe repair kit (available from £30)
- Replace all clips/pipes at once — if one has gone, others will follow
- This is a straightforward DIY job: 1-2 hours
- Dealers often replace under goodwill if the car is newer — worth asking
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £12–£60 |
| Independent Garage | £30–£150 |
| Main Dealership | £48–£240 |
Other Faults on This Variant
EDC Automated Clutch Actuator Failure
SevereThe EDC (Easy Drive) semi-automatic gearbox variant of the 1.5 dCi Clio uses an electric clutch actuator. When this fails, the car refuses to move — and replacements are expensive.
Delphi Fuel Injector Failure
CriticalEarly 1.5 dCi engines (K9K) used Delphi fuel injectors that were highly prone to failure, causing misfires and sometimes producing metal swarf that destroys the entire fuel system.
Scuttle Panel Drain Blockage (Water Ingress)
ModerateLeaves and debris block the drains under the windscreen wipers. Rainwater builds up and overflows directly onto the wiper motor or into the cabin via the heater matrix.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.