Workhorse large van built for heavy-duty commercial use
The Citroen Relay is the UK's longest-serving large van, based on the Fiat Ducato platform since 2006. It competes with the Ford Transit, Mercedes Sprinter, and VW Crafter. Used examples start from around £5,000-£15,000 depending on mileage and specification. Known for mechanical simplicity and strong HDi diesel engines, many Relays exceed 150,000 miles in commercial service. It is the budget choice in the large van segment with lower purchase and running costs than rivals.
We track 8 known issues across the Citroen Relay range, including 1 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Citroen Relay? Enter the reg to see which of our 8 known issues apply to that exact car, plus full MOT history and mileage checks.
Gen1 (1994–2006) — Engine options included the 1.9 HDi, 2.5 D, 2.8 HDi, 2.8 HDi.
Gen2 (2006–2024) — Engine options included the 1.9 HDi, 2.0 HDi, 2.0 HDi, 2.2 HDi, 2.2 HDi, 2.2 HDi, 2.2 HDi, 2.8 HDi, 2.8 HDi, 3.0 HDi, 3.0 HDi.
The load-bearing structure around subframe, spring, and suspension mounting points corrodes severely on Relay models, with MOT data showing failure rates up to 3274.4x the national fleet average. This affects the vehicle's structural integrity and can cause suspension components to detach from the body. The issue is particularly severe on salt-exposed vehicles and worsening year-on-year according to DfT statistics. Commercial use accelerates the problem due to higher loads and year-round operation.
Mounting point failure can cause suspension components to separate from the vehicle structure, resulting in immediate loss of control and potential fatal accident. The vehicle becomes structurally unsafe and must not be driven. Repair typically requires extensive welding and fabrication work costing £1,000-£3,000 depending on the extent of corrosion.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
Suspension bushes, pins and joints wear excessively on Relay models, showing MOT failure rates up to 963.2x the national fleet average. The commercial vehicle loading and frequent stop-start operation accelerates rubber bush degradation and ball joint wear. Lower wishbone bushes, anti-roll bar links, and ball joints are particular failure points. The issue affects handling safety and tire wear patterns.
Worn suspension components compromise vehicle handling and braking performance, creating a safety risk especially when carrying commercial loads. Complete failure can cause loss of control. Repair costs vary from £200-£800 depending on which components need replacement, with ball joint failure requiring immediate attention.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
Variable geometry turbochargers on DW10 and DW12 engines suffer from actuator seizure and bearing failure, particularly when service intervals are extended or low-quality oil is used. The actuator mechanism that controls vane position becomes clogged with carbon deposits, while bearing wear is accelerated by commercial vehicle duty cycles. Symptoms include loss of power, black smoke, and whistling noises. Later Euro 5 engines show improved reliability but remain susceptible to the same failure modes.
Complete turbo failure results in severe power loss making the vehicle unsuitable for commercial use. Oil contamination from failed seals can damage the engine. A replacement turbocharger costs £600-£1,500 depending on type, with fitting adding £200-£400 to the total repair bill.
During a test drive, check for hesitation, lack of power or unusual whining from the turbo area. Watch for blue or white smoke from the exhaust under hard acceleration. Check the oil condition and service history — turbos rely on clean oil.
Diesel Particulate Filters block frequently on Relay models used for urban delivery work with insufficient sustained high-speed driving for natural regeneration. The DPF warning light illuminates when the filter reaches capacity, requiring forced regeneration or replacement. Short journey patterns prevent the exhaust reaching the 600°C needed for automatic burn-off. Blocked DPF causes power loss and can damage the turbocharger if ignored.
A completely blocked DPF causes severe power loss and potential engine damage from excessive back-pressure. DPF replacement costs £500-£1,500 depending on type. Attempting to drive with DPF warning lights active can damage the turbocharger and exhaust system, significantly increasing repair costs.
Ask about the car's typical usage — short urban journeys prevent DPF regeneration. Check for DPF warning lights and ask about any previous regeneration issues. A forced regeneration at a garage costs far less than a DPF replacement.
Common rail diesel injectors on DW10 and DW12 engines fail due to high operating pressures and contamination from poor fuel quality. The Piezo-electric and electromagnetic injectors are particularly sensitive to fuel system contamination and carbon build-up. Failure typically affects one cylinder initially, causing rough running and increased emissions. Commercial vehicle duty cycles with frequent starts and extended idling accelerate injector wear.
Failed injectors cause rough running, increased fuel consumption, and potential engine damage from incorrect fuel delivery. Single injector replacement costs £400-£1,200 depending on type, but failure often affects multiple cylinders requiring complete set replacement. Continued driving with failed injectors can damage the catalytic converter.
Check for fuel smells around the engine bay and underneath the car. Look for staining or wetness around fuel lines and connections. Injector issues may cause rough running or misfires that are most noticeable at idle.
For the full breakdown of all 8 tracked issues with repair costs, see the Citroen Relay common problems page.
Based on 309k real DVSA MOT tests, the Citroen Relay fails more often than average on several items. The biggest outlier is power steering fault at 597x the fleet average, followed by restriction in free movement of the braking system (326x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Citroen Relay MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 13k miles) typically costs £80–£120 at an independent garage.
The bigger-ticket items to budget for include timing belt (£350–£500).
See the full Citroen Relay service schedule for every interval and cost breakdown.
The Citroen Relay has some well-documented weak points, including 1 safety-critical issue that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable. 2014-2018 with the 2.2 HDi 130 or 150bhp engines offer the best balance of proven reliability and modern features. The 2014 facelift improved the cab interior and added Euro 6 compliance. Avoid very early 2006-2008 models due to age-related electrical and rust issues. The 2.0 BlueHDi (2016+) is more efficient but check turbo and AdBlue system health. Always verify full service history on any commercial van.
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific Citroen Relay, we cross-reference the exact variant, engine and age against our database of 8 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 8 known Citroen Relay issues. We are not affiliated with any source listed.