How much does a BMW 750e engine replacement cost in the UK?

A reconditioned B58 engine for the 750e typically costs £6,000–£9,000 supply only. Fitting adds £1,200–£1,800. The hybrid system components (battery, electric motor) are additional costs if they need replacement. Main dealer new engines can exceed £22,000.

Is the BMW 750e engine reliable?

The B58 petrol engine is rated ★★★★☆ - it's one of BMW's most reliable modern engines. However, the 750e's plug-in hybrid system adds complexity: battery degradation is expected over time, and electric motor cooling issues can occur. The B58 itself is well-proven and reliable.

What are the common problems with the BMW 750e?

Battery degradation (range loss), electric motor and charging system issues, and B58 cooling system failures are the most common. The B58 itself is reliable, but the hybrid system demands specialist attention.

Is it worth replacing a BMW 750e engine, or should I scrap the car?

Against a £60,000–£100,000+ 750e, a £7,500 recon engine is a manageable 7–12% of the vehicle's value - worth it. Given the G70's strong retained values, replacement is almost always viable. However, if the hybrid battery also needs replacement (£8,000–£15,000), assess carefully.

How do I find my BMW 750e engine code?

Listed on the VIN plate and vehicle documentation. The 750e uses the B58 3.0-litre petrol engine combined with an electric motor. The badge signifies the plug-in hybrid model. Tell us your registration date and we'll confirm it for free.

Can I repair the 750e's hybrid battery, or does it need a new engine?

The hybrid battery is separate from the engine. Cell-level replacement or module replacement is possible, costing £3,000–£6,000. If the entire battery pack needs replacement, it's significantly more expensive (£8,000–£15,000). BMW's 8-year/100,000-mile battery warranty provides some protection.

BMW 7 Series 750e2023–presentB58 + e-Motor

BMW 7 Series 750e Engine Replacement — Compare Prices & Get Quotes

Get quotes today from trusted UK BMW 750e specialists. Compare reconditioned, rebuilt and used B58 engines and hybrid drive units for the flagship plug-in hybrid - supply & fit available nationwide.

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BMW 750e Engines - from £5,000 to £12,000Code: B58B30 + e-Motor

BMW 750e Engines - from £5,000 to £12,000· Code: B58B30 + e-Motor

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

The 750e THROUGH TIME - Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

BMW's flagship plug-in hybrid - proven B58 petrol combined with electric motor; battery degradation and cooling system are the main watchpoints.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

G70

2023–presentB58B30 + e-Motor (18.7 kWh battery)★★★★☆ [NEWLY ASSIGNED - see Data Note]£6,000–£10,000 [PLACEHOLDER - confirm vs cost sheet]BMW's flagship plug-in hybrid - proven B58 petrol combined with electric motor; battery degradation and cooling system are the main watchpoints.

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW 7 Series 750e Engine Replacement Costs

Supply Only£6,000–£9,000

Fitted (Indie)£7,200–£10,500

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£5,000–£7,500£6,100–£8,8003–6 monthsBudget priority; vehicle under £25,000

Reconditioned Engine£6,000–£9,000£7,200–£10,50012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£8,000–£12,000£9,200–£13,50012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£15,000–£22,000£17,000–£25,00024–36 monthsInsurance jobs, warranty claims; high-voltage system requires specialist equipment

Labour estimate: Fitting a 750e engine and hybrid system typically takes 14–18 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Hybrid system work requires specialist high-voltage training.

Common Problems With BMW 320d Engines

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BMW 750e - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

BMW 750e - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseBattery degradation (750e)⚠️ Depends£3,000–£6,000Cell replacement is viable if caught early; full pack replacement is expensiveElectric motor cooling pump failure (750e)✅ Yes£1,000–£2,000Straightforward replacement; don't ignore cooling warningsCharging system failure (750e)✅ Yes£1,500–£3,000Control unit or charging port replacement; specialist requiredWater pump failure (B58)✅ Yes£500–£1,200Preventative - replace at 60,000 milesTiming chain wear (B58)✅ Yes£1,500–£2,500If caught early; very rare on B58Hybrid transmission failure⚠️ Sometimes£5,000–£9,000Assess against vehicle value; often cheaper to replace the whole unit

Buying This 750e? Check These First

Buy If

Full BMW service history with documented oil-change intervals
Battery health report available - check capacity against new (aim for >85% of original)
Evidence of regular charging and use - hybrid systems prefer regular operation
Low-mileage example with full running-in service completed

Avoid If

Drivetrain warning lights with no diagnosis
Significantly reduced electric range compared to new (below 70% of original)
No service history - the B58 is reliable but the hybrid system demands maintenance
Charging issues - the car won't charge or takes significantly longer than expected

Closing Verdict

The 750e is BMW's flagship plug-in hybrid, combining the proven B58 inline-six with an efficient electric motor. The B58 itself is one of BMW's most reliable engines, but the hybrid system adds complexity. Buy on battery health and service history - this is a premium vehicle that demands premium care.

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Buying Checklist

Before you buy a used BMW 750e (or before you commit to an engine replacement), check these:

Battery Health

What is the current electric range compared to new? Check the battery health report

Cold Start

Listen for any rattle on startup (timing chain wear - very rare on B58)

Service History

Including B58 engine maintenance and hybrid system checks

Charging System

Does the car charge correctly? Any error messages?

Drivetrain Warning

Any warning lights on the dash? Have codes been read?

Electric Range

Test the electric range in real conditions; significant loss indicates battery degradation

Regenerative Braking

Does it function correctly? Any unusual noises from the transmission?

MOT History

Check for emissions-related failures; the B58 should pass easily if well-maintained

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

B58B30 + e-Motor

Years2023–present

Power489 bhp (total) / 18.7 kWh battery

2025 Enquiries- (pattern data)

Avg. Recon Cost£6,000–£10,000 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

B58B30 + e-Motor2023–present489 bhp (total) / 18.7 kWh battery- (pattern data)£6,000–£10,000 [PLACEHOLDER]

Technical Specs

B58 + e-Motor

Displacement (B58)2,998cc

Cylinders6-cylinder inline

Compression Ratio11.0:1

Fuel SystemDirect injection

TurbochargerSingle twin-scroll turbo

Electric MotorIntegrated into 8-speed automatic transmission

Battery18.7 kWh lithium-ion

Market Intelligence

Most Common Failure

Battery degradation and hybrid system issues

55%

of 750e enquiries

[PATTERN DATA]

Average Enquiry Mileage

35,000

miles

[PATTERN DATA]

Average Replacement Cost

£7,500

reconditioned, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

B58B30 + e-Motor

[BMW-VERIFIED]

Peak Enquiry Season

Summer

battery performance declines in heat; cooling system issues worsen

[PATTERN DATA]

Regional Demand

London28%

South East22%

South West14%

PATTERN DATA

Regional Demand Breakdown

28%London

22%South East

BMW 320d - Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty - always confirm terms with your chosen supplier.

Find the best BMW 750e engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and protect your flagship investment.

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100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available