Found a replacement engine quote quickly, and the supplier clearly explained the delivery and warranty options.
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Popular BMW 840d Diesel Engine Models
Compare used and reconditioned engine guide prices from trusted UK suppliers. Find replacement engine options by model, price and availability.
Available Engine Models
Starting guide prices for replacement engines
Quick Quotes
| Engine Code | CC | Size | Fuel | Number of Cylinders | Aspiration | Fits | Price (From) |
|---|---|---|---|---|---|---|---|
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
-300
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2018-2020 | - |
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
-300
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2018-2020 | - |
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
-300
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2019-2020 | - |
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
0
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2018-2020 | - |
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
0
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2018-2020 | - |
|
BMW
BMW 840d Diesel Engine B57D30B
Average rating:
5
4
0
B57D30B
|
3.0 Litre | 2993 cc | Diesel | V TYPE 12 CYLINDER | Turbo | 2019-2020 | - |
BMW 840d Diesel engine replacement: the quick answer
What are your options? For a BMW 840d Diesel with serious engine failure, the main BuyEngines routes are a used engine for lower initial cost or a reconditioned engine for greater renewal and potentially longer warranty, with supply-only or fitted service available.
- Potential saving: up to 40% against comparable main-dealer routes where the job and specification allow.
- Reconditioned engine warranty: up to 3 years, depending on the engine and stated terms.
- Recovery: available for non-running vehicles to the garage doorstep across mainland UK.
- Service choice: supply-only or supply-and-fit.
- Used engine warranty: up to 6 months, depending on the unit and stated terms.
Which BMW 840d Diesel replacement gives the best value?
| Option | Usually suits | Warranty position |
|---|---|---|
| Used engine | Lower upfront budget, quicker return to the road where suitable stock exists | Up to 6 months, subject to unit and terms |
| Reconditioned engine | Owners keeping the vehicle longer or wanting a more extensively renewed unit | Up to 3 years, subject to engine and terms |
Do not compare the two by purchase price alone. Ask what is included, what the warranty requires from the fitter and which additional parts should be renewed before the replacement is commissioned.
How much does a replacement BMW 840d Diesel engine cost?
There is no credible single fixed price for every BMW 840d Diesel. The figure changes with the exact engine code, condition, mileage or reconditioning level, availability, ancillaries, warranty and whether labour is included. The total fitted price can also change if the workshop finds damaged supporting components or the cause of the original failure must be corrected. BuyEngines is designed to compare alternatives rather than present a misleading universal figure. Where a comparable main-dealer route exists, suitable jobs can deliver savings of up to 40%, but the meaningful comparison is the completed repair with like-for-like inclusions.
How we narrow down the correct BMW 840d Diesel engine
The model name is only the starting point. A useful engine quote may require the registration, VIN, model year, fuel type, capacity, transmission and engine code. Those details help distinguish engines that share a capacity or outward appearance but use different sensors, ancillaries, emissions equipment, mounts or electronics. Ask the supplier to confirm the proposed unit against the vehicle before payment and dispatch. Also confirm whether the quote is for a bare engine, long engine or a unit supplied with selected ancillaries.
Do not ignore the systems around the BMW 840d Diesel engine
Diesel replacement costs can change significantly depending on which ancillaries are included. Ask whether the quote covers the turbo, injectors, fuel-system parts and other attached components, or whether these are inspected and transferred separately.
How will the BMW 840d Diesel get back on the road?
You can buy the replacement engine for your own garage, or choose a fitted option through the BuyEngines network. A non-running vehicle can also be recovered to the selected workshop across mainland UK. This matters because broken-engine jobs often become expensive through fragmented arrangements: one company supplies the engine, another transports the car and a third fits it. Comparing the whole route early makes responsibilities clearer and can shorten the time between engine failure and a usable vehicle.
Why fitting quality and written terms matter
The engine is only one part of the outcome. A correct unit can still give problems if an external cause of failure is ignored or the installation is rushed. Ask the garage how it will check cooling, lubrication and relevant ancillaries, and make sure warranty requirements are understood before the old engine is removed. BuyEngines combines 35 years of experience with modern workshop facilities, qualified mechanics and a network of garages across mainland UK to support a more complete replacement route.
Match the BMW 840d Diesel engine solution to your circumstances
The best quote depends on what you are trying to optimise-cost, speed, warranty, convenience or long-term value:
- If this is an older vehicle, compare the completed engine repair with the real cost of replacing the car, including the uncertainty of buying another used vehicle whose history you do not know.
- If you need budget certainty, ask which extra charges could arise only after removal of the old engine. Knowing the likely exceptions in advance makes supplier quotes easier to compare fairly.
- If warranty is your main concern, compare the written conditions-not just the number of months or years. Check what the fitter must replace, document or test for the cover to remain valid.
Complex electronics and higher-value ancillaries make a clearly scoped premium-vehicle engine quote more important. Diesel installations should consider the components around the engine, especially any fault that could damage the replacement through poor lubrication, fuelling or boost control.
Your BMW 840d Diesel engine enquiry in three steps
- Identify the car: Send the BMW 840d Diesel registration and any VIN or engine-code details available.
- Choose the route: Tell us whether you want used, reconditioned or both; supply-only or fitted; and whether recovery is required.
- Compare the complete quote: Check engine specification, warranty, inclusions, fitting scope and any likely additional parts before you commit.
The aim is to give you a route from engine failure to a properly matched replacement without unnecessary calls between unrelated suppliers.
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Replacement Engine Help
Clear answers for UK drivers comparing used, reconditioned, supply-only and fitted replacement engine quotes.
Frequently asked questions about BMW 840d Diesel replacement engines
Can my broken BMW 840d Diesel be recovered to the garage?
Yes. If the vehicle is not driveable, recovery can be arranged to the garage doorstep across mainland UK. Include the vehicle location when requesting the quote so transport and fitting can be planned together.
Could I save money compared with a main dealer on a BMW 840d Diesel engine?
Potentially. BuyEngines states savings of up to 40% against comparable main-dealer routes on suitable jobs. The exact saving varies, so compare like-for-like engine condition, warranty, labour, recovery and included parts.
How much is a replacement BMW 840d Diesel engine in the UK?
There is no reliable one-price answer. The total depends on the exact engine code, used or reconditioned condition, availability, included ancillaries, warranty, recovery and fitting. A vehicle-matched written quote is more meaningful than a generic advertised figure.
Is a used BMW 840d Diesel engine a good option?
It can be when the vehicle needs a cost-controlled repair and a correctly matched unit with clear condition and warranty is available. Used engines supplied through BuyEngines can have warranty cover of up to six months, subject to the individual engine and terms.
What details do you need to find the correct BMW 840d Diesel engine?
Start with the registration. VIN, model year, engine code, fuel type, capacity, transmission or exact derivative may also be needed. The purpose is to confirm compatibility before the engine is reserved or dispatched.
Should I buy a used or reconditioned engine for my BMW 840d Diesel?
A used engine usually suits a lower upfront budget; a reconditioned engine can suit owners planning to keep the vehicle longer and wanting greater internal renewal and longer warranty potential. Compare the complete fitted cost and warranty, not the engine price alone.
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