How much does an EGR valve clean or replacement cost?

Clean: £120–£250. Replacement: £250–£800 fitted depending on vehicle and whether the cooler also needs replacing.

Here's a quick, honest answer from a working UK mechanic — what causes it, what it costs to fix, and what to do next.

Will EGR cleaner additives work? — Mildly, on early-stage carbon. They cannot fix a stuck or electrically failed valve.

Why does it keep clogging? — Mostly short-trip driving. Long, hot motorway runs help keep modern diesels clean.

Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email [email protected].