BMW 5 Series 545e2020–20233.0-litre Plug-in Hybrid

BMW 545e Engine Replacement —Compare Prices &
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Name: BMW 545e UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

The 545e combines BMW's legendary B58 straight-six with an electric motor for 394 hp and 600 Nm of torque — 0–62 mph in 4.6 seconds with up to 33 miles of electric range. It's the most powerful plug-in hybrid 5 Series ever built. Get quotes from UK specialists for reconditioned, rebuilt and used units today.

Supply &Fit Available
12-MonthWarranty
NationwideDelivery
20+Specialists

Supply &Fit Available
12-MonthWarranty
NationwideDelivery
20+Specialists

BMW 545e Engines — from £3,000 to £8,000Code: B58B30C

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No Obligation
100% Free
Reconditioned
Rebuilt
Used
Supply & Fit Available
UK-Wide Network

Instant Quotes
No Obligation
100% Free
Reconditioned
Rebuilt
Used
Supply & Fit Available
UK-Wide Network

BMW 545e Engine Replacement Costs

Supply Only£4,000 – £6,500
Fitted (Indie)£5,500 – £8,000
Warranty12–24 months
Best ForMost owners — best cost/warranty balance

Engine Type	Supply Only	Fitted (Indie)	Warranty	Best For
Used Engine	£3,000 – £5,000	£4,500 – £6,500	1–6 months	Budget priority; lower‑mileage examples
Reconditioned Engine	£4,000 – £6,500	£5,500 – £8,000	12–24 months	Most owners — best cost/warranty balance
Rebuilt Engine	£5,500 – £8,000	£7,000 – £9,500	12–24 months	Long‑term ownership; 3+ year horizon
Main Dealer New	£7,000 – £10,000	£8,500 – £12,000	24–36 months	Insurance jobs, warranty claims

Figures above reflect the current 545e market. Note that these figures are for the combustion engine only — the hybrid battery is a separate component (see FAQ). Used B58 engines from the 545e are relatively scarce due to the model's limited production run.

Labour estimate: Fitting a 545e engine typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). The hybrid system adds complexity — ensure your chosen specialist has PHEV experience.

Compare 545e engine prices from UK specialists

Common Problems With BMW 5 Series 545e Engines

1. Cooling System Leaks(Water Pump and Hoses)

Symptoms: Coolant loss with no visible external leak, rising temperature gauge, warning light, steam from the engine bay, heater not working properly
Typical Mileage: 60,000–100,000 miles
Repair Cost: £500–£1,200 (water pump replacement)
Replacement Cost: N/A — repair only
Urgency: Check — book inspection urgently

Our recommendation:

The B58's cooling system is its most common weak point. The water pump can fail, and the plastic coolant hoses can become brittle. The 545e's hybrid system adds extra cooling complexity, making regular inspection essential. Replace the water pump preventatively at around 60,000–80,000 miles. Check coolant levels regularly and investigate any drop immediately.

Read the full coolant leak guide /failures/m54-cooling-system

1. Cooling System Leaks(Water Pump and Hoses)

Symptoms: Coolant loss with no visible external leak, rising temperature gauge, warning light, steam from the engine bay, heater not working properly
Typical Mileage: 60,000–100,000 miles
Repair Cost: £500–£1,200 (water pump replacement)
Replacement Cost: N/A — repair only
Urgency: Check — book inspection urgently

Our recommendation:

Read the full coolant leak guide /failures/m54-cooling-system

2. High-Voltage Battery Degradation

Symptoms: Reduced electric range, longer charging times, warning lights, reduced power in EV mode, battery management system errors
Typical Mileage: 50,000–100,000 miles (age-related, typically 5–8 years)
Repair Cost: £3,000–£8,000 (battery replacement or cell module replacement)
Replacement Cost: N/A — repair only (battery replacement is separate from engine replacement)
Urgency: Monitor — book inspection soon

Our recommendation:

Like all PHEVs, the 545e's 11.6 kWh battery will degrade over time. Battery capacity loss typically becomes noticeable after 5–7 years or 100,000 km. Symptoms include reduced electric range and longer charging times. BMW's battery management system is sophisticated, but regular use and avoiding frequent 100% charges can extend battery life. If you notice significant range loss, have the battery health checked by a BMW specialist. Note that battery replacement is separate from engine replacement — and can be costly.

Read the full hybrid battery failure guide /failures/battery-parasitic-drain

3. Oil Filter Housing Leaks

Symptoms: Oil spots under the car, burning oil smell from the engine bay, low oil pressure warning, coolant loss, engine warning light
Typical Mileage: 60,000–100,000 miles
Repair Cost: £800–£1,800 (oil filter housing replacement, including intake manifold removal)
Replacement Cost: N/A — repair only
Urgency: Check — book inspection urgently

Our recommendation:

The B58's oil filter housing is a known weak point. The housing can crack, causing coolant or oil leaks. Because it sits under the intake manifold, replacement is labour-intensive. Check for oil spots regularly and investigate any drop in fluid levels promptly.

Read the full oil filter housing failure guide /failures/n55-valve-cover-oil-leak

Weighing Your Options?

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545e — Repair, Buy, or Replace?

Not every issue means a new engine.Here’s what can be repaired, when it makes sense, and what to check before you buy.

Can It Be Repaired?

Problem	Repairable?	Typical Cost	When It Makes Sense
Water pump/cooling system leak	Yes	£500 – £1,200	Straightforward replacement — catch before overheating
Oil filter housing crack	Yes	£800 – £1,800	Labour-intensive but well-understood; once replaced, issue rarely recurs
Hybrid battery degradation	Yes	£3,000 – £8,000	Cell module replacement or full battery replacement — expensive but cheaper than a new car
Timing chain wear (rare)	Yes	£1,200 – £2,500	The B58 is far more reliable than earlier chains — but tensioners can still wear
Engine failure (catastrophic)	Usually No	Engine replacement	Rare on the B58 — but if it happens, replacement is the only option

ProblemRepairable? · Typical Cost

Water pump/cooling system leak

Yes£500 – £1,200

Straightforward replacement — catch before overheating

Oil filter housing crack

Yes£800 – £1,800

Labour-intensive but well-understood; once replaced, issue rarely recurs

Hybrid battery degradation

Yes£3,000 – £8,000

Cell module replacement or full battery replacement — expensive but cheaper than a new car

Timing chain wear (rare)

Yes£1,200 – £2,500

The B58 is far more reliable than earlier chains — but tensioners can still wear

Engine failure (catastrophic)

Usually NoEngine replacement

Rare on the B58 — but if it happens, replacement is the only option

Buying This 545e? Check These First

Buy if:

Full service history with correct BMW-spec oil — the B58 is reliable but unforgiving of neglect
Evidence of cooling system maintenance — water pump or hoses replaced
Battery health report — ask the seller for a battery capacity test
A well-maintained example where the previous owner understood the PHEV's unique requirements

Avoid if:

Evidence of repeated coolant top-ups without a diagnosed leak — the cooling system is the B58's Achilles' heel
Reduced electric range compared to factory figures — battery degradation may be advanced
Poor service history — these engines are sensitive to oil quality
Any engine warning light without a clear diagnosis
No evidence of battery health checks — PHEV batteries are expensive to replace

Closing verdict

The 545e is a genuinely remarkable car — combining the B58's legendary smoothness and tunability with electric efficiency. The engine itself is one of BMW's most reliable, but the hybrid system adds complexity. Battery degradation is the main long-term concern — budget for it at around 8–10 years. Buy on history, maintain on schedule, and the 545e will reward you with performance and efficiency that few cars can match.

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Buying Checklist

Before you buy a used BMW 545e (or before you commit to an engine replacement), check these:

1. Coolant Level
Any unexplained loss? (cooling system warning)
2. Service History
Including evidence of cooling system maintenance and oil changes
3. Battery Health
Ask for a battery capacity test or health report
4. Electric Range
Does it match the expected 30+ miles? (range loss indicates battery degradation)
5. Oil Spots
Any oil under the car? (oil filter housing or valve cover leak warning)
6. Cold Start
Any rattles? (timing chain issues are rare on B58 but possible)
7. Charging Behaviour
Does it charge normally? Any charging errors?
8. MOT History
Check for emissions-related failures

Why this matters

A 10-minute check now can save you thousands later. The right 5 Series 545e is a superb long-term car — the wrong one can be expensive fast.

Buying Checklist

Before you buy a used BMW 545e (or before you commit to an engine replacement), check these:

1
Coolant Level
Any unexplained loss? (cooling system warning)
2
Service History
Including evidence of cooling system maintenance and oil changes
3
Battery Health
Ask for a battery capacity test or health report
4
Electric Range
Does it match the expected 30+ miles? (range loss indicates battery degradation)
5
Oil Spots
Any oil under the car? (oil filter housing or valve cover leak warning)
6
Cold Start
Any rattles? (timing chain issues are rare on B58 but possible)
7
Charging Behaviour
Does it charge normally? Any charging errors?
8
MOT History
Check for emissions-related failures

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 5 Series 545e pitfalls.

Engine Codes

This table's rows match Section 1B's Era Map exactly — one engine throughout this badge's production run.

B58B30C

Years: 2020–2023
Power: 394 hp (combined)
2025 Enquiries: [PATTERN DATA]
Avg. Recon Cost: £4,000–£6,500[BMW-QUOTE]

Engine Code	Years	Power	2025 Enquiries	Avg. Recon Cost
B58B30C	2020–2023	394 hp (combined)	[PATTERN DATA]	£4,000–£6,500[BMW-QUOTE]

Technical SpecsB58B30C — 545e

Displacement: 2,998cc (3.0-litre)
Cylinders: Straight-6
Compression Ratio: 11.0:1
Fuel System: Direct injection
Turbocharger: Single twin-scroll turbocharger
Valvetrain: DOHC, 4 valves per cylinder, Valvetronic, Double-VANOS
Electric Motor: 109 hp (combined system output: 394 hp)
Battery: 11.6 kWh lithium-ion

Compare 545e engine prices for your BMWGet quotes from trusted UK specialists in minutes.

Market Intelligence

Real data from thousands of 5 Series 545e enquiries in 2025.

Most Common FailureCooling system leaks and water pump failure

The primary weakness of the B58

Average Enquiry Mileage

40,000–70,000

miles

[PATTERN DATA]

Average Replacement Cost

£4,000–£6,500

reconditioned, supply only

[BMW-QUOTE]

Most Requested Engine Code

B58B30C

The 545e's hybrid B58

[PATTERN DATA]

Peak Enquiry Season

Spring

Pre‑summer vehicle preparation

[PATTERN DATA]

Regional Demand

London: 22%
South East: 18%
South West: 14%
Other Regions: 46%

[PATTERN DATA]

Regional Demand Breakdown

22%London18%South East14%South West46%Other Regions

Frequently Asked Questions

A reconditioned B58B30C engine typically costs £4,000–£6,500 supply only, with used units available from £3,000–£5,000. Fitting adds £1,500–£2,500 depending on the workshop. Note that the hybrid battery is a separate component — replacement costs £3,000–£8,000. Use our calculator for a figure specific to your car.

Yes — the B58 is widely regarded as one of BMW's most reliable modern engines. The 545e's B58 is the same engine used in the 540i and Toyota Supra. The main concerns are the cooling system (water pump, hoses) and battery degradation over time. With good maintenance, the engine itself is exceptionally durable.

Cooling system leaks and water pump failure, high-voltage battery degradation (reduced electric range after 5–8 years), and oil filter housing leaks. The B58 is fundamentally robust — these are maintenance items, not catastrophic design flaws.

545e values remain strong — a well-kept G30 LCI is often worth £20,000–£35,000+. A £4,000–£6,500 reconditioned engine is only 15–25% of the vehicle's value — well within the 70% BMW threshold. However, if the hybrid battery also needs replacing, total costs can approach 40–50% of the car's value. Evaluate both components before deciding.

The engine code is B58B30C — it's the only engine used in the G30 LCI 545e (2020–2023). You can find it on the VIN plate, in the vehicle documentation, or on a label on the engine itself. Production ended in 2023.

The hybrid battery is a separate component from the engine — it can be replaced independently. Battery replacement costs £3,000–£8,000 depending on whether you need cell module replacement or a full battery pack. BMW's battery warranty typically covers 8 years / 100,000 miles in the UK — check if your car is still covered.

Disclaimer: 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.

Why UK BMW 5 Series 545e Owners Trust BMWEngines.uk

Trusted 545e Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real 545e owners, as part of the Engine Finders network, across the G30 LCI generation.
Compare 545e Engine Replacement Companies
see prices, warranty terms and supply & fit options side‑by‑side before you commit, with specialists who genuinely understand the B58's cooling system and the PHEV's unique requirements.
UK Engine Replacement Services for 545e
supply‑only or full supply & fit available nationwide, covering BMW's most powerful plug-in hybrid 5 Series with a 12‑month warranty as standard.

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BMW 545e Engine Replacement Costs

Common Problems With BMW 5 Series 545e Engines

1. Cooling System Leaks(Water Pump and Hoses)

2. High-Voltage Battery Degradation

3. Oil Filter Housing Leaks

1. Cooling System Leaks(Water Pump and Hoses)

2. High-Voltage Battery Degradation

3. Oil Filter Housing Leaks

Weighing Your Options?

545e — Repair, Buy, or Replace?

Can It Be Repaired?

Buying This 545e? Check These First

Buying Checklist

Buying Checklist

Engine Codes

Market Intelligence

Regional Demand Breakdown

Frequently Asked Questions

Why UK BMW 5 Series 545e Owners Trust BMWEngines.uk

Trusted 545e Engine Suppliers

Compare 545e Engine Replacement Companies

UK Engine Replacement Services for 545e

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