“How much does a timing chain replacement cost?” is the question we get asked more than any other. The honest answer — and we mean honest, not the “it depends” deflection — is that it depends on three things: which engine you have, which engine variant within that family, and how thorough the workshop doing it actually is. Here’s a real breakdown.

What drives the cost?

• Where the chain is in the engine. A front-mounted chain (most petrols, most Fords) is a few hours of access. A rear-mounted chain (BMW N47, B47, N57) needs the gearbox out — a full day or more of labour.
• How many parts get changed. A chain on its own is half the story — tensioners, guides, sprockets and seals all wear together. A good job replaces the lot.
• Genuine vs pattern parts. Pattern timing chains exist for £40 a kit. They will not last. Genuine BMW/Ford parts cost 3–5× more, and they do.
• Specialist vs generalist labour rate. A specialist can do a BMW N47 chain in a day. A generalist can take three. Their lower hourly rate often doesn’t make up for it.

Realistic 2026 prices — Sussex & Surrey

These are typical fitted prices we’re seeing in our area for a complete, genuine-parts replacement at independent specialist workshops:

• Ford 1.0 EcoBoost wet belt (Fiesta, Focus, Puma): typically lower hundreds — call it the price of a long weekend away.
• Ford 1.5 EcoBlue wet belt: a little more than the EcoBoost, due to access.
• Ford 2.0 EcoBlue wet belt (Transit Custom, Kuga, Galaxy): more again, particularly on vans.
• BMW N47 timing chain (320d, 520d, 116d, 118d etc. 2007–2014): mid four figures at the main dealer, significantly less at a specialist.
• BMW B47 timing chain (2014 onwards diesels): similar to N47, sometimes slightly more.
• BMW N57 timing chain (330d, 530d, X5 30d etc.): top of the range — V6 diesel, more parts, more access.

For an exact price for your car, give us your registration via our free estimate form — same-day quote.

Hidden costs to watch for

• Oil pump pickup — on EcoBoost/EcoBlue wet belt cars, if the belt has shed, the pickup may need replacing. Add a couple of hundred.
• Damaged guides — if your BMW chain has been left rattling too long, the plastic guides may be worn into the head. Add machining or head removal.
• Valve damage — if the chain has jumped, you’re past the timing chain repair stage and into engine reconditioning.
• Vanos units — BMW variable cam systems sometimes need attention while everything is off.

Should I do it on a car worth less than the repair?

The honest answer depends on the rest of the car. A 14-year-old 320d with a rusted floor and an MOT due isn’t worth a £1,800 chain job. A 6-year-old 320d that’s otherwise mint with full service history and you trust the rest of it is a no-brainer.

What you should not do is keep driving it. A snapped chain = a scrap car. A worn chain replaced = another 100,000 miles of service.

Get a real number for your car

We’re based in Copthorne and cover Gatwick, Crawley, Horley, Reigate, East Grinstead, Redhill and the surrounding 15 miles. Free vehicle collection. Call 01342 643 780 or request an estimate online.