A clear breakdown of what "supply and fit" means for a BMW engine replacement – including labour, parts, sundries, and what you should ask before committing. Based on real 2025 UK data.
The short answer: "Supply and fit" means the total cost of a replacement engine, including the engine itself (supply) and the labour to remove the old one and install the new one (fit). In our 2025 UK data, the average fitted premium for a BMW engine is £650–£1,560 at independent specialist rates, with total fitted costs ranging from £3,800–£18,000 depending on the engine [EM‑QUOTE]. The hidden costs are in the details: oil, coolant, filters, gaskets, and diagnostic work can add significantly if not included.
Next step: Use our Repair vs Replace Calculator to estimate your total fitted cost, or get a quote from a specialist.
In the engine replacement world, "supply and fit" is the all‑in price for the complete job – but not all quotes include the same things.
Supply refers to the engine itself: a used, reconditioned, or rebuilt unit supplied by the specialist. This is the core cost and varies widely by engine code and condition. For example, an N47D20C reconditioned supply is £3,200–£5,500, while an S63B44 reconditioned supply is £9,000–£14,000 [EM‑QUOTE]. The supply price typically includes a warranty (12‑24 months for reconditioned units, less for used).
Fit is the labour and sundries needed to remove the old engine, prepare the bay, and install the replacement. This includes the specialist's time, but also things like engine oil, coolant, filters, and any necessary gaskets or seals. It does not usually include the cost of repairing any ancillary parts that are found to be worn (e.g., clutch, turbo, injectors) – though a good specialist will warn you about these during the quote.
Always ask for a fixed‑price supply‑and‑fit quote that lists exactly what is included. A quote that says "supply and fit" without detail is a red flag – you need to know what's covered and what's not.
Based on actual 2025 UK quotes from our vetted specialist network [EM‑QUOTE]. The fitted price is the supply cost plus labour hours and sundries.
| Engine | Supply (Recon) | Labour Hours | Labour Cost (Indie @ £75/hr) | Sundries | Total Fitted Cost |
|---|---|---|---|---|---|
| N47D20C | £3,200–£5,500 [EM‑QUOTE] | 10–14 hrs | £750–£1,050 | £150–£250 | £4,100–£6,800 |
| N57D30 | £4,500–£7,000 [EM‑QUOTE] | 12–16 hrs | £900–£1,200 | £200–£350 | £5,600–£8,550 |
| S63B44 | £9,000–£14,000 [EM‑QUOTE] | 18–24 hrs | £1,350–£1,800 | £300–£500 | £10,650–£16,300 |
Indie labour rates are assumed at £75/hr (mid‑range). Sundries include oil, coolant, filters, gaskets, and disposal fees. Main dealer fitted costs are typically 30‑50% higher. Always get a written quote.
Labour is a significant part of the fitted cost. Rates vary by location and workshop type. Here's what to expect in 2025 [THIRD-PARTY].
| Workshop Type | Hourly Rate (excl. VAT) | Typical Region |
|---|---|---|
| Independent Specialist | £65 – £90 | North / Midlands |
| Independent Specialist | £90 – £130 | London / South East |
| Main Dealer | £120 – £160 | Nationwide |
| Mobile Mechanic | £50 – £80 | Nationwide |
Labour rates are indicative for 2025. Always confirm the hourly rate and the estimated hours before agreeing to a job. For a full breakdown, see our Labour Rates & Fitting Times page.
Our 70% repair‑to‑value threshold is based on the total fitted cost, not just the supply price. Always include labour and sundries in the ratio.
Supply: £4,500 (mid‑range). Labour: 12 hrs × £75 = £900. Sundries: £200. Total fitted: £5,600.
Ratio: £5,600 ÷ £7,500 = 75% – 🔴 Scrap (over 70%)
If the car were worth £9,000, the ratio drops to 62% – ✅ Safe. This is why the total fitted cost matters.
Always get a full supply‑and‑fit quote before applying the 70% rule. Our calculator can do this for you.
It typically includes the engine itself (supply) plus the labour and sundries to remove the old engine and install the replacement. Sundries often include oil, coolant, filters, and gaskets. Always ask for a detailed breakdown.
Labour alone ranges from £650–£2,160 depending on hours and rate. Total fitted cost depends on the engine supply price. For a 4‑cylinder N47, total fitted is £4,100–£6,800; for a V8 S63, it's £10,650–£16,300 [EM‑QUOTE].
Common extras include oil and coolant, filters and gaskets, ancillary parts (turbo, injectors), diagnostic work, and coding. Always get a fixed‑price quote that lists everything.
The fitted cost. The 70% rule compares the total cost of the job (supply + labour + sundries) to your car's current trade value. Labour can push a borderline case over the threshold.
Use our registration lookup to get fixed‑price quotes from vetted specialists, or try the calculator to estimate total costs.
Genuine Enquiry DataBuilt from 9,000+ real 2025 UK BMW engine enquiries, not estimates.
Fully Disclosed MethodThe only BMW engine site that publishes its scrap‑threshold methodology openly.
20+ Vetted BMW SpecialistsEvery recommendation routes to a specialist who works on these engines daily.
100% IndependentNo sponsors, no manufacturer influence — including when the honest answer is "don't repair it."
Use our calculator to estimate total costs, or connect directly with a vetted specialist for a fixed‑price quote.
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