Bentley Engine Replacement -Get Quotes from UK Specialists

A rebuilt Bentley engine typically costs between £6,000 and £15,000 supplied only, depending on the model and engine type. A 4.0-litre V8 (CMMC/CMMD) from a Continental GT or Flying Spur typically ranges £7,500–£10,500 for a reconditioned unit, while a 6.0 W12 (DBDA/DDBD/CKHB) ranges £9,500–£15,000. Adding supply and fit adds £1,200–£2,000 depending on the workshop. Main dealer prices for a new W12 can exceed £24,000 – our specialist network typically undercuts dealers by 40–60%.

Four factors drive the price: engine type (W12 costs more than V8, which costs more than the rare diesel), condition (rebuilt with warranty vs used as-is), supply-only vs supply-and-fit, and your location – London and South East labour rates can be 20–30% higher than the national average. The age of your Bentley also matters: older 6.75 V8 engines (Arnage, Mulsanne) require specialist rebuilders, which can increase costs compared to high-volume 4.0 V8 units. Our marketplace gives you transparent, all-in quotes from UK specialists so you can compare like-for-like.

In most cases, yes. If the chassis, gearbox, and interior are in good shape, a rebuilt Bentley engine with upgraded components (improved timing chain tensioners on W12 units, enhanced oil feed screens on V8s) will often outlast the original. The alternative – selling your Bentley as a non-runner and buying a replacement – typically costs far more once you factor in market prices. For a Continental GT worth £20,000–£35,000, a £8,000–£12,000 specialist replacement keeps the car on the road for another 80,000+ miles. If your Bentley has significant body or electrical issues, replacement may not make sense.

A full supply-and-fit service includes sourcing the correct engine code for your Bentley, removal of the failed unit, installation of the replacement engine, all new gaskets, seals, filters, fresh oil and coolant, and a road test to confirm proper operation. Most specialists also include a 12-month unlimited mileage workmanship warranty on the fitting, plus the engine’s own component warranty (typically 12-24 months). The old engine is usually yours to keep unless you arrange disposal separately. Typical fitting-only costs range £1,200–£2,000 for a V8 and £1,500–£2,500 for a W12 (engine-out required).

For a common engine like the 4.0 V8 in a Continental GT or Flying Spur, a specialist can typically complete the swap in 3–5 working days. A W12 replacement (engine-out procedure, more complex ancillaries) usually takes 5–7 working days. The biggest variable is engine availability – our network of UK suppliers stocks commonly replaced codes (CMMC, DDBD, CYCB) for next-day dispatch, but rarer units (6.75 V8 for Arnage, 4.4 BMW-sourced V8) may take 5–10 days to source. Always ask your shortlisted suppliers for their current lead time before booking.

Yes. Every reconditioned or rebuilt Bentley engine supplied through EngineMarket comes with a minimum 12-month unlimited mileage warranty. Many specialists offer 24-month coverage on W12 and 4.0 V8 units that have been fully remanufactured with upgraded components (timing chains, oil pumps, bearings). The warranty typically covers major internal components: crankshaft, pistons, connecting rods, timing chain, camshafts, oil pump, and cylinder head castings, provided the engine is fitted by a qualified professional. Exclusions usually cover ancillaries (turbochargers, injectors, coils) and damage from overheating or incorrect installation. Always confirm exact terms with your chosen supplier before purchase.

A used Bentley engine is cheaper upfront – typically £3,500–£6,500 for a 4.0 V8, £5,000–£8,000 for a W12 – but comes with no meaningful warranty (often just 30–90 days) and unknown history. A reconditioned or rebuilt engine costs 40–60% more (£7,500–£15,000) but includes new rings, bearings, gaskets, timing components and a 12-24 month warranty. For a Bentley you plan to keep long-term, especially a W12 with known timing chain issues or a 4.0 V8 with turbo oil starvation vulnerability, a reconditioned unit with upgraded parts is almost always the better investment. For a quick resale or a tight budget, a warranted used engine from a breaker may work.

EngineMarket connects you with a UK-wide network of independent Bentley engine specialists – from well-known rebuilders in the Midlands and South East to trusted fitters across the North West and Scotland. We don't favour any single region; instead, our registration lookup matches you with suppliers who have your specific engine code in stock or can source it quickly, regardless of your location. Nationwide delivery is available for supply-only orders, and many specialists offer collection and fitting services if you're within 50 miles.

The most common replacement-driving failures include: timing chain tensioner failure on pre-2010 6.0 W12 engines (DBDA/DDBD, affects Continental GT and Flying Spur), turbo oil starvation on the 4.0-litre hot-V V8 (CMMC/CMMD/CYCB/CYCA, affects Bentayga and modern Continental GT), cylinder bore scoring on high-mileage 6.75 V8 units (Arnage, Mulsanne), and crankshaft bearing failure on higher-mileage W12 engines across the range. These failures typically present with warning lights, unusual noises, or oil pressure warnings, and by the time they're diagnosed, the engine often requires full replacement rather than repair. Early detection rarely prevents these from turning catastrophic – which is why a warranted replacement engine is the most common solution.

Always compare quotes from at least three UK specialists – prices for the same rebuilt engine code can vary by £1,000–£2,000 between suppliers. If you have a trusted independent garage, ask for supply-only pricing and arrange fitting separately; this can save £300–£500 compared to a specialist's supply-and-fit package. Consider a used engine from a breaker if your budget is under £5,000 and you're planning to sell the car within two years. Ask every supplier whether their quote includes VAT, delivery, fitting, and the old engine collection – hidden extras add 10–20% to the final bill.