How much does it really cost to replace a BMW engine? Based on 9,000+ UK enquiries and verified supplier quotes, we break down average supply and fitted costs by engine family – used, reconditioned, and rebuilt.
The average supply cost for a reconditioned BMW engine in our 2025 dataset is £4,700, with a fitted cost averaging £5,900 including labour. The cheapest common engine is the N47 at around £3,850 fitted, while the most expensive is the S63 at over £12,000 fitted. Used engines are typically 30–40% cheaper than reconditioned, but carry more risk.
Use these numbers to benchmark your own quote, or try our Repair vs Replace Calculator to see if a replacement makes financial sense for your car.
Every number on this page comes from real UK supplier quotes and workshop data. Here’s exactly how we built the cost figures.
Source: Proprietary supplier quote data from EnginesMarket.co.uk (our CRM) and direct interviews with 100+ UK engine specialists. Cross‑checked against eBay Motors and PistonHeads classifieds for market validation. All figures are for supply‑only unless stated as fitted. Labour rates are based on independent workshop averages of £65/hr (North England/Midlands). London/South East adds 40–60%.
What counts as a “cost”: We include the typical price ranges for used, reconditioned, and rebuilt engines. These are the three most common supply categories in our enquiry data. Labour hours are estimated per engine, and we calculate a “fitted” range by adding labour at the quoted hourly rate.
Limitations: These are indicative prices. Actual quotes can vary based on mileage, condition, warranty, geographic location, and whether ancillary parts (turbo, injectors, etc.) are included. We always recommend getting at least two independent quotes before committing.
Refresh cycle: This is our first published edition (2026 baseline). We will update annually each February.
With 1,450 requests, the N47D20C has a reconditioned supply cost of £3,200–£5,500 and a fitted total of £3,850–£6,410 [EM-QUOTE]. Used units are even cheaper, at £1,800–£3,200 supply. This makes it the most affordable BMW engine to replace, partly due to high availability.
The B58B30 (540 requests) has a reconditioned supply of £3,800–£6,000 and fitted range of £4,450–£6,910 [EM-QUOTE]. The B47D20A sits at similar levels. Both are modern units with good parts support, keeping costs reasonable compared to older V8s.
The hot‑vee V8s (N63 and S63) command the highest prices. N63B44 recon supply is £6,000–£10,000, fitted £7,040–£11,430 [EM-QUOTE]. The S63 is even pricier at £9,000–£14,000 supply, fitted £10,170–£15,560 [EM-QUOTE]. These reflect both the complexity of the engines and the limited number of specialists willing to work on them.
Across all engines, the supply cost for a used unit is roughly 60–70% of a reconditioned one. However, used engines carry higher risk of unknown history and shorter remaining life, which is why many owners still opt for reconditioned.
Labour hours range from 8 hours (4‑cylinder diesels) to 24 hours (S63 V8). At £65/hr, this adds £520–£1,560 to the final fitted price. Main dealer labour can be 40–60% higher, so independent specialists are the most cost‑effective route for engine swaps.
These findings are based on supplier quote data [EM-QUOTE] and enquiry volumes [EM-VERIFIED]. For a deeper dive into specific engine costs, see our Replacement Cost by Engine Code page.
All common BMW engine families with enough data to provide meaningful price ranges. Costs are supply‑only unless noted. Fitted ranges include labour at independent rates [EM-QUOTE].
| Engine Code | 2025 Requests | Used (Supply) | Recon (Supply) | Rebuilt (Supply) | Labour Hours | Fitted Range (Recon + Labour) |
|---|---|---|---|---|---|---|
| N47D20C | 1,450 | £1,800–£3,200 | £3,200–£5,500 | £4,500–£6,500 | 10–14 hrs | £3,850–£6,410 |
| B47D20A | 930 | £1,500–£2,800 | £2,800–£4,500 | £3,800–£5,800 | 8–12 hrs | £3,320–£5,280 |
| N57D30 | 830 | £2,500–£4,500 | £4,500–£7,000 | £6,000–£9,000 | 12–16 hrs | £5,280–£8,040 |
| B58B30 | 540 | £2,000–£3,800 | £3,800–£6,000 | £5,000–£8,000 | 10–14 hrs | £4,450–£6,910 |
| B57D30 | 460 | £2,800–£5,000 | £5,000–£8,000 | £7,000–£10,500 | 12–16 hrs | £5,780–£9,040 |
| N63B44 | 440 | £3,500–£6,000 | £6,000–£10,000 | £8,000–£14,000 | 16–22 hrs | £7,040–£11,430 |
| S63B44 | 410 | £5,000–£9,000 | £9,000–£14,000 | £12,000–£18,000 | 18–24 hrs | £10,170–£15,560 |
All enquiry figures [EM-VERIFIED]. Cost figures [EM-QUOTE]. Labour hours from [EM-INTERVIEW]. Fitted ranges are approximate and do not include additional parts (turbo, injectors, etc.) that may be required. Full methodology on our Data Methodology page.
This is our first published edition of the Average Replacement Cost report – 2026 is our baseline year. We have no previous data to compare against, but we have established a methodology that will allow year‑on‑year comparisons from 2027 onward.
We will update this page annually, tracking how replacement costs evolve with inflation, parts availability, and changes in the UK specialist market. Future editions will include trends such as “Has the B58 become cheaper to replace as more units enter the used parts market?”
For a broader view of BMW engine data, see our Engine Failure Index 2026 and Average Mileage at Failure reports.
If you’ve been quoted an engine replacement, compare it to the typical ranges in this table. For a common N47 in a 3 Series, a reconditioned fitted cost of £5,000 is broadly in line with the market. But if the quote exceeds £7,000, it’s worth getting a second opinion – especially when you can use our calculator to weigh the cost against the car’s value.
Remember: these are average costs. Prices can be 20% higher in the South East, and main dealer rates will add a significant premium. Always ask whether the quote includes ancillaries like turbochargers, injectors, or coolant system components, as these can add hundreds or thousands to the final bill.
If you’re facing a high‑cost engine failure (e.g., N63 or S63), check our scrap guide to see if replacement is financially sensible, or consider our Repair vs Replace Framework for a structured decision process.
Feel free to reference this data in forum posts, articles, or research. Suggested attribution:
For press enquiries or the full underlying dataset, contact us via our About page. We're happy to provide additional context or breakdowns for journalists.
Across our dataset, the average reconditioned supply cost is approximately £4,700, with a fitted average of around £5,900. However, this varies widely – from under £4,000 for an N47 to over £12,000 for an S63. The exact cost depends on the engine model, condition (used, recon, rebuilt), and labour rates.
Used engines are typically 30–40% cheaper than reconditioned ones. For example, a used N47 costs £1,800–£3,200 supply, whereas a reconditioned unit is £3,200–£5,500. However, reconditioned engines come with a warranty and known rebuild standards, which can be worth the extra cost if you plan to keep the car long‑term.
Labour hours range from 8 hours (4‑cylinder) to 24 hours (V8). At an independent rate of £65/hr, this adds between £520 and £1,560. Main dealers can charge £100–£150/hr, so the labour cost could be significantly higher.
The N63 is a hot‑vee V8 design that is complex to work on – accessing components often requires extensive disassembly. It also has a higher failure rate and fewer specialists willing to work on it, which drives up both parts and labour costs. The B58, being a more modern inline‑6, is simpler and benefits from better parts availability.
The table shows supply‑only costs for used, reconditioned, and rebuilt engines. The fitted range is calculated by adding the labour cost (hours × £65) to the reconditioned supply cost. This gives a realistic fitted price, but we always recommend getting a written quote that includes all parts and labour before committing.
Real UK EnquiriesBased on 9,000+ BMW‑specific quotes from 2025, not estimates.
Methodology DisclosedWe state plainly what this data can and cannot tell you.
20+ Vetted SpecialistsCosts cross‑checked with workshop experience.
100% IndependentNo manufacturer influence – we publish what the data says.
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