Compare Mazda EGR valve repair quotes from specialist garages

Mazda is named after Ahura Mazda, the Iranian-Zoroastrian God of intelligence, wisdom and harmony. Since the company was founded in 1920, it has built a reputation for creating efficient, sporty vehicles that are fun to drive. It's also famous for creating the rotary engine, which uses fewer moving parts than a traditional piston-based engine and features in several Mazda models, including the 1969 Luce R130 coupe.

The Mazda MX-5 Roadster has been listed as the best-selling two-seater car in the Guinness Book of World Records several times. It was also used to make history in 2022, breaking the record for the largest parade of Mazda cars with 707 MX-5s.

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.