EngineHigh
2.2 HDi turbo failure and timing belt neglect
- Typically appears
- 80,000+ miles
- What to inspect
- Check service history for timing belt renewal and listen for turbo whine
2006–2024 Citroen Relay · common problems & known faults
A large panel van shared with the Peugeot Boxer and Fiat Ducato, valued by fleets, so buyers should expect heavy use and check drivetrain wear carefully.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2006–2024 Citroen Relay are 2.2 HDi turbo failure and timing belt neglect, Rust on chassis rails and rear door bottoms and Water ingress from the scuttle panel causing rusted injectors and ECU faults. 4 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
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Build the inspection planReliability snapshot
Based on the documented faults on this page for the Citroen Relay.
3.4/ 10
- Critical
- 0
- High
- 4
- Medium
- 4
- Low
- 0
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
ElectricalMedium
Instrument cluster and dashboard warning light faults
- Typically appears
- Age-related
- What to inspect
- Check all warning lights extinguish correctly after start-up
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Build the inspection planSuspensionMedium
Front suspension and steering rack wear from heavy loads
- Typically appears
- 70,000+ miles
- What to inspect
- Check for excessive play in the steering and uneven tyre wear
BodyworkHigh
Rust on chassis rails and rear door bottoms
- Typically appears
- Age-related
- What to inspect
- Inspect chassis rails and door bottoms for corrosion
Exhaust & emissionsMedium
DPF blocking on vans doing mostly short journeys
- Typically appears
- 60,000+ miles
- What to inspect
- Check for a DPF warning light and confirm a regen completes on a run
Engine BayHigh
Water ingress from the scuttle panel causing rusted injectors and ECU faults.
- Typically appears
- From 3 years or 30,000 miles
- What to inspect
- Open the bonnet and inspect the top of the engine block and injector housings for heavy rust or standing water. Check the scuttle panel seal against the windscreen for visible gaps.
TransmissionHigh
Dual Mass Flywheel (DMF) wear causing juddering and metallic rattling.
- Typically appears
- 70,000-100,000 miles
- What to inspect
- Start the engine, leave it in neutral, and listen for a metallic rattle. Depress the clutch pedal halfway to feel for heavy pulsation or vibration coming through the pedal.
Body HardwareMedium
Side loading door runner and bearing failure causing the door to drop or jam.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Fully open and close the side loading door. Feel for excessive resistance or grinding noises, and check if the door aligns perfectly flush with the body panels when shut.
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Build my inspection planFrequently asked questions
Is a timing belt check essential?
Yes, the 2.2 HDi has an interference engine and belt neglect causes major damage.
Should I be worried about rust?
Chassis rails and rear doors are the areas to inspect closely on older vans.
Are these vans reliable long term?
Yes with regular servicing, they are known for covering very high mileages.
Do the later BlueHDi models suffer from AdBlue system faults?
Yes, the 2016-onwards BlueHDi engines frequently experience AdBlue pump and tank failures. The pump is integrated into the tank, meaning the entire unit often requires costly replacement if it fails. Check the dash for the 'UREA' warning light and ensure the countdown timer isn't active during your forecourt appraisal.
Are there any known security vulnerabilities with the door locks?
The Mk2 Relay is highly susceptible to lock barrel attacks and door peeling, particularly on the rear and side loading doors. Thieves frequently target the standard locks to access the cargo area. Always inspect the metalwork around the lock barrels for distortion, which indicates previous forced entry attempts.
What causes the common crunching noise when changing gears?
This is typically caused by worn synchroniser rings in the six-speed manual gearbox, most commonly affecting second and third gears. It is a widespread issue on vans subjected to heavy multi-drop urban use. If the gear selection feels stiff or crunches during a quick shift, a gearbox rebuild is required.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.
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