How Much Does a New BMW Engine Cost?
Image: BMW B57D30A complete engine with just 41K miles for sale at MT Auto Parts for £4,399.99
The short answer: significantly more than most people expect. A new BMW engine from a franchised dealer is one of the most expensive single components you can buy for any car, and for most out-of-warranty BMW owners, it is also rarely the most sensible option. Here is what new engines actually cost, what the alternatives look like, and how to make a decision that doesn't cost more than it needs to.
New BMW Engine Prices: What Dealers Charge
New BMW engine prices vary considerably by engine type, displacement, and specification, but the figures are consistently high. The prices below are supply-only estimates based on UK dealer network pricing. Labour to fit the engine is on top, typically adding £800 to £2,000 depending on the complexity of the job and the garage carrying it out.
Note: Used prices reflect current MT Auto Parts stock at the time of writing and vary with mileage, specification, and availability. New dealer prices are estimates; actual quotes will differ.
Looking at the table, the pattern is clear. A used genuine B47 diesel engine, the same OEM unit that left the factory in a 320d or X3 — costs between £1,950 and £5,500 depending on mileage, compared to £6,000 to £7,500+ new from a dealer. A used N55 starts from around £4,000. Even high-performance units like the S63 V8, which costs upwards of £15,000 new, can be found for under £10,000 as a low-mileage used genuine unit.
Why New Is Rarely the Right Answer
When a BMW engine fails outside warranty, the car's market value rarely justifies the cost of a new replacement unit. A B47-engined 320d worth £12,000 on the used market does not benefit economically from a £6,000 new engine plus fitting. The maths simply doesn't work.
This is why the majority of engine replacements on out-of-warranty BMWs are carried out using quality remanufactured or used BMW engines. The alternatives are worth understanding properly.
Used genuine BMW engines
A used BMW engine from a reputable specialist breaker's yard is the same genuine OEM component as a new dealer part, just with mileage on it. A B47 from a documented low-mileage written-off BMW will perform identically to a new unit and costs a fraction of the dealer price. What to look for: donor mileage stated explicitly, a minimum 30-day warranty covering core mechanical components, actual photographs of the engine, and a supplier who confirms the engine code matches your car before it ships, if that is needed.
Remanufactured engines
A remanufactured BMW engine has been stripped, inspected, and rebuilt to a defined standard using a mix of new and reconditioned components. Remanufactured units cost more than used engines but less than new and carry longer warranties, typically three to six months. They are a sensible middle ground for buyers who need higher confidence than a used unit provides but can't justify new dealer pricing.
Electric motors — a different market
Replacement electric motors for BMW's EV and PHEV range: iX3, i4, X1 30e, 225e, 330e, are a growing part of the specialist breakers market. Used genuine rear and front motors are now available from documented low-mileage donor cars at significantly less than new dealer pricing. The i4 and iX3 rear drive units, for example, are available in the £3,000 to £3,300 range from MT Auto Parts, considerably less than the cost of a new replacement.
Always factor fitting costs into your total budget before comparing options. An independent BMW specialist will typically charge £600 to £1,500 for engine removal and refitting. A franchised dealer will charge considerably more.
Used BMW Engines for Sale — What We Stock
At MT Auto Parts, we break BMW-only F, G and U-generation models from 2012 onwards. Every engine we sell is removed from a car we've dismantled ourselves, listed with the donor vehicle's mileage, and sold with a 30-day warranty covering the core components. We're not a general breaker's yard; BMW is all we do. When you enquire about an engine, we know the engine codes, the fitment variations, and whether the unit on our shelf actually matches your car. Our current stock includes complete units across the B38, B47, B48, B57, N55, N57, S58, and S63 ranges, plus electric motors for hybrid and full-electric models. Over 15,000 five-star reviews say everything. Check current stock or send us your engine code at mtautoparts.com.
Frequently Asked Questions
Is it worth replacing a BMW engine?
It depends on the car's value and condition. If the rest of the car is sound and its market value comfortably exceeds the total cost of an engine replacement, including fitting, then replacing the engine usually makes more sense than scrapping or buying a replacement. A used genuine engine from a reputable supplier typically costs a fraction of a new unit, which changes the equation significantly.
How long does a used BMW engine last?
A used BMW engine from a low-mileage documented donor car has the same service life potential as a new unit. A B47 or B48 with 30,000 to 40,000 miles on it has the same internal condition it had when it left the factory at that mileage. With correct oil change intervals after fitting, it should run for well over 100,000 additional miles.
How do I know a used BMW engine is the right one for my car?
Engine code matching is the key check. Your engine code is on the block itself and on your V5C registration document. A reputable BMW engine supplier will confirm the code of the unit they're selling and verify it matches your car before dispatch. The donor mileage should be stated explicitly, not estimated.
Are electric BMW motors available as used parts?
Yes, and increasingly so. As early iX3, i4, X1 30e, and 225e models enter the specialist breakers market through accident damage, used genuine electric and hybrid drive motors are becoming available at significantly lower prices than new replacements. MT Auto Parts currently stocks front and rear electric motors for several BMW EV and PHEV models. Send your model and year to confirm availability.
Disclaimer: Prices in this article are estimates based on UK dealer network pricing and current MT Auto Parts stock at the time of writing. Actual costs vary by supplier, specification, and market conditions. Always obtain a direct quote before budgeting for an engine replacement.
