Citroen Relay Problems & Known Issues

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.

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.

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.

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.