Compare Ford S-Max EGR valve repair quotes from specialist garages

Ford was the first carmaker to introduce a vehicle assembly line, speeding up the process of production and bringing cars to more people than ever before. The brand's motorsport credentials are equally impressive. In the 1966 24 Hours of Le Mans race, Ford ended Ferrari's six-year winning streak, beating the likes of Porsche and Lamborghini to the title with an ever-popular GT40.

Jim Morrison, the lead singer of rock band The Doors, famously adored his 1967 Ford Shelby GT500, the only car he ever owned. It is a mystery to this day where the vehicle ended up after his death.

Find out the average price of a Ford service or MOT here, or read this guide to see how Ford's maintenance costs compare with Vauxhall and Volkswagen.

EGR stands for exhaust gas recirculation. The EGR valve links the intake manifold and the exhaust manifold. It plays a vital role in helping to reduce the amount of NOx emitted from a car. Learn more about how it works here.

Over time, EGR valves can become clogged due to a build-up of soot, and when this happens, an EGR valve clean or replacement is required. Common symptoms of an EGR fault include rough idling, erratic engine functioning (including stalling), increased fuel consumption and higher emissions.

Some manufacturers recommend using an EGR cleaning service every 50,000 miles; doing so helps prevent performance issues and extends the component's life.

EGR valves typically have a lifespan of around ten years. After this time, it's best to book an EGR valve replacement if you experience any of the symptoms listed above. A stuck EGR valve will speed up the process of the diesel particulate filter (DPF) becoming blocked.