Engines Market

BMW 745e SPECIALISTS

BMW 7 Series 745e Engine Replacement Compare Prices & Get Quotes

Get free, no-obligation quotes today from trusted UK BMW 7 Series 745e engine specialists. Compare prices on reconditioned, rebuilt and used B58B30C plug-in hybrid engines for G11 and G12 745e models.

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BMW 7 Series 745e Engine
from£5,000 to £8,000
  • Usedfrom £3,500
  • Reconditionedfrom £5,000
  • Common codesB58B30C, B58B30M0
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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW 7 Series 745e Engine History & Specs at a Glance

The BMW 745e debuted in 2019 as part of the G11/G12 7 Series Life Cycle Impulse (LCI) update, replacing the four-cylinder 740e with a more powerful six-cylinder plug-in hybrid powertrain. It paired BMW's renowned B58 3.0-litre turbocharged straight-six with an electric motor, offering a compelling blend of luxury, performance and efficiency.

BMW 7 Series 745e
  1. 2019

    B58B30C, 3.0-litre inline-six turbo petrol + electric motor, 286 hp (210 kW) combustion + 113 hp electric, 394 hp system output, G11/G12 LCI launch

  2. 2019

    745Le (long wheelbase) and 745Le xDrive variants introduced alongside standard 745e

  3. 2020

    B58B30M0 variant introduced for xDrive models with revised hybrid calibration

  4. 2022

    Production ends (February 2022); replaced by G70-generation 750e xDrive

Every engine fitted to the BMW 7 Series 745e is covered below, with UK rebuilt pricing and known failure points.

Compatible Engines

BMW 7 Series 745e Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

B58B30C — 3.0L Inline-Six Turbo PHEV (2019-2022) engine

B58B30C — 3.0L Inline-Six Turbo PHEV (2019-2022)

Power Output (Combustion)
286 hp (210 kW) @ 5,000 rpm
Torque
450 Nm @ 1,500-3,500 rpm
Electric Motor
113 hp (83 kW) PSM permanent magnet synchronous motor
System Power
394 hp (290 kW)
Years Fitted
2019-2022
Chassis
G11 (standard wheelbase), G12 (long wheelbase)
Displacement
2,997 cc
Fuel System
Direct injection
Transmission
8-speed automatic (ZF 8HP)

Can’t find your exact engine code?-> Get quotes for B58B30C BMW 7 Series 745e engine replacement

-> Get quotes for B58B30C BMW 7 Series 745e engine replacement

Common Problems

BMW 7 Series 745e Engine Problems Repair Cost vs Replacement

The BMW 745e is powered by the B58B30C - one of BMW's most robust modern engines - paired with a plug-in hybrid system. While the B58 is significantly more reliable than older BMW turbo engines, it has a few well-documented weak points, primarily around the cooling system.Rebuilt B58B30C engines supplied through EnginesMarket include upgraded cooling system components, fresh gaskets and seals, and a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Coolant System Leaks

Affected
BMW 7 Series 745e (B58B30C/B58B30M0, 2019-2022)
Typical failure mileage
50,000-80,000 miles
Root cause
The B58's plastic water pump, expansion tank and thermostat housing can develop cracks over time due to heat cycling. Coolant leaks are the most frequently reported issue across the B58 family.

Repair options

Repair tierDealer priceSpecialist price
Water pump replacement£900-£1,400£600-£950
Expansion tank and hose replacement£500-£800£350-£600
Full Replacement - rebuilt/reconditioned engine£7,500-£10,500£5,500-£8,000 (matches Section 4 rebuilt figure)
Our recommendation
The B58's cooling system is its Achilles' heel - replace the water pump and expansion tank preventatively at around 60,000-70,000 miles if you're keeping the car. It's far cheaper than repairing an overheated engine. If your 745e has already overheated, get a compression test done immediately; if the head gasket is compromised, a rebuilt engine is the safest route.
-> Compare rebuilt B58B30C BMW 7 Series 745e engine prices

Excessive Oil Consumption

Affected
BMW 7 Series 745e (B58B30C/B58B30M0, 2019-2022)
Typical failure mileage
60,000-100,000 miles
Root cause
Some B58 engines develop oil consumption issues due to PCV valve failure or, in rarer cases, valve stem seal wear. This can lead to blue smoke on startup and the need for frequent top-ups.

Repair options

Repair tierDealer priceSpecialist price
PCV valve replacement£500-£800£350-£600
Valve stem seal replacement£2,500-£4,000£1,800-£2,800
Full Replacement - rebuilt/reconditioned engine£7,500-£10,500£5,500-£8,000
Our recommendation
Start with a PCV valve replacement - it's the most common cause of oil consumption on the B58 and the cheapest fix. If oil consumption persists, have a specialist perform a leak-down test to determine whether valve stem seals or piston rings are the root cause. A rebuilt engine with new valve stem seals and piston rings is the definitive solution.
-> Compare rebuilt B58B30C BMW 7 Series 745e engine prices

High-Voltage Hybrid Battery Degradation

Affected
BMW 7 Series 745e (all variants, 2019-2022)
Typical failure mileage
80,000-120,000 miles or 6-8 years
Root cause
The 12 kWh lithium-ion battery pack naturally degrades over time, reducing electric-only range. Battery cells can also fail individually, triggering warning lights and reduced performance.

Repair options

Repair tierDealer priceSpecialist price
Battery health check and cell balancing£300-£600£200-£400
Individual battery module replacement£3,000-£5,000£2,000-£3,500
Complete battery pack replacement£12,000-£15,000£9,000-£12,000
Our recommendation
Hybrid battery degradation is inevitable but typically gradual. If your 745e's electric range has dropped noticeably, start with a diagnostic health check. Individual module replacement is often more cost-effective than a full pack replacement. Note that a healthy battery is essential for the 745e's 34-36 mile electric range - without it, you're effectively driving a heavier, less efficient petrol 7 Series.
-> Compare BMW 7 Series 745e hybrid battery replacement costs

Don't Let Engine Failure Write Off Your BMW 7 Series 745e

The B58-powered 745e is one of the most refined plug-in hybrids on the market, but coolant leaks, oil consumption and hybrid battery degradation can turn expensive quickly. A rebuilt engine through EnginesMarket addresses cooling system weaknesses with upgraded components and comes with a 12-month unlimited-mileage warranty. Compare quotes from UK specialists today and keep your 745e on the road for years to come.

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FAQ

BMW 7 Series 745e Engine ReplacementFrequently Asked Questions

Everything BMW 7 Series 745e owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare BMW 7 Series 745e Engine Prices Today

Comparing quotes for your BMW 7 Series 745e engine replacement is completely free and carries no obligation. Enter your registration or engine code (B58B30C or B58B30M0) above, and our network of vetted UK specialists will provide transparent, itemised pricing for used, reconditioned, and rebuilt engines - all with warranty and nationwide delivery options.

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