BMW 3 Series 320e Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 3 Series 320e engine specialists. Compare prices on reconditioned, rebuilt and used engines for the G20/G21 320e Plug-in Hybrid - powered by the B48B20A 2.0-litre petrol engine paired with an electric motor for 204 hp system output.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £3,200 to £5,500
Used from £1,500 · Reconditioned from £2,800 · Common codes: B48B20A
From £1,500
Tested, bare/short engine
From £2,800
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best BMW 3 Series 320e Replacement Engineto Finding the Best BMW 3 Series 320e Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 3 Series 320e - Engine History & Specs at a Glance
The BMW 320e arrived in March 2021 as the new entry-level Plug-in Hybrid in the 3 Series range, sitting below the 330e. It pairs the proven B48 2.0-litre four-cylinder petrol engine with an electric motor, delivering 204 hp system output while offering up to 57 km (35 miles) of electric-only range.
Variant HistoryBMW 3 Series 320e - Engine History & Specs at a Glance
The BMW 320e arrived in March 2021 as the new entry-level Plug-in Hybrid in the 3 Series range, sitting below the 330e. It pairs the proven B48 2.0-litre four-cylinder petrol engine with an electric motor, delivering 204 hp system output while offering up to 57 km (35 miles) of electric-only range.
BMW 3 Series 320e
Fuel TypePetrol / Electric (Plug-in Hybrid)
Engine Size1,998 cc
System Power Output204 hp (150 kW)Engine History Timeline
B48B20A (163 hp petrol + 109 hp electric motor 204 hp system output). Launched in the G20 320e Sedan and G21 320e Touring.
B48B20A (same specification). Continued with G20 LCI (Life Cycle Impulse) update.
B48B20A (same specification). Production continues.
Key Specs Snapshot
Fuel TypePetrol / Electric (Plug-in Hybrid)Engine Size1,998 ccSystem Power Output204 hp (150 kW)Years Produced2021-presentEvery engine fitted to the BMW 3 Series 320e is covered below, with UK rebuilt pricing and known failure points.
BMW 3 Series 320e Engine Codes - Specifications & Replacement CostBMW 3 Series 320e Engine Codes - Specifications & Replacement Cost
2.0-litre Petrol Plug-in Hybrid (2021-present)
Power Output163 hp (petrol engine) / 109 hp (electric motor) / 204 hp (system output)Years Fitted2021-present
Compatible Trim Levels
- 320e
- 320e M Sport
- 320e xDrive
- 320e Touring
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,800
Reconditioned
Addressed known issues, tested
£2,800-£4,500
Rebuilt
Full teardown, upgraded internals
£3,800-£5,500
Common Failure
The B48 engine is generally robust, but common issues include coolant leaks (water pump and expansion tank), PCV valve failure, and high-pressure fuel pump issues. The 320e's hybrid system adds complexity - the electric motor is integrated into the 8-speed Steptronic transmission, meaning gearbox and hybrid component health should be checked alongside the engine.
The BMW 3 Series 320e is powered by the B48B20A 2.0-litre four-cylinder petrol engine - a member of BMW's modular B48 family known for generally strong reliability. Unlike the older N-series engines, the B48 does not suffer from catastrophic timing chain failures. However, cooling system components and the hybrid drivetrain add complexity. Rebuilt engines supplied through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW 3 Series 320e B48 Needs Attention
Affected Vehicles
BMW 3 Series 320e (B48B20A, 2021-present)
Typical Failure Mileage
60,000-120,000 miles
Root Cause
The B48's water pump and plastic coolant expansion tank are known failure points. The water pump can fail, leading to engine overheating. Coolant leaks from plastic fittings are common and should be addressed promptly.
Why It Happens
The B48's water pump and plastic coolant expansion tank are known failure points. The water pump can fail, leading to engine overheating. Coolant leaks from plastic fittings are common and should be addressed promptly.
Dealer (parts + labour)
£700-£1,200
Specialist (parts + labour)
£400-£800
What it involves
Replace water pump, inspect cooling system
Suitability
Essential if overheating or coolant loss detected
1 - 2 daysDealer (parts + labour)
£5,000-£7,500
Specialist (parts + labour)
£3,800-£5,500 (matches Section 4's rebuilt figure for B48B20A)
What it involves
Supply & fit, 12-month warranty
Suitability
Only if engine damage has occurred - rare on B48
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Water pump replacement Minor | £700-£1,200 | £400-£800 | Replace water pump, inspect cooling system | Essential if overheating or coolant loss detected | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £5,000-£7,500 | £3,800-£5,500 (matches Section 4's rebuilt figure for B48B20A) | Supply & fit, 12-month warranty | Only if engine damage has occurred - rare on B48 | 1 - 2 days |
Our Recommendation
Our Recommendation
The B48 engine in the BMW 3 Series 320e is broadly reliable, and catastrophic engine failure is rare. Focus on preventative maintenance - cooling system inspections and regular oil changes with the correct BMW Longlife-17 FE+ spec oil. If you do experience engine failure, a rebuilt B48 with upgraded components is a sound long-term investment given the high value of 320e models.
Don't Let Engine Failure Write Off Your BMW 3 Series 320e
Whether you're dealing with cooling system issues or need to compare prices for a used or reconditioned BMW 3 Series 320e engine, EnginesMarket connects you with vetted UK specialists. Every rebuilt engine carries a minimum 12-month unlimited-mileage warranty with upgraded components addressing the original failure points. Compare quotes today and avoid main dealer premiums.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific BMW 3 Series 320e. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 3 Series 320e Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 3 Series 320e engine replacement cost-
A BMW 3 Series 320e engine replacement typically costs between £3,800 and £5,500 for a rebuilt B48B20A unit. The hybrid system adds complexity, so ensure your quote includes the engine only or the full hybrid system as required.
- Used BMW 3 Series 320e engines: £1,500-£2,800
- Reconditioned BMW 3 Series 320e engines: £2,800-£4,500
- Rebuilt BMW 3 Series 320e engines: £3,800-£5,500
Question 2Does the BMW 320e have timing chain issues-
No - the B48 engine fitted to the BMW 3 Series 320e does not suffer from the catastrophic timing chain failures of older BMW engines like the N47 or N20. The B48's timing chain is front-mounted and far more accessible. Regular oil changes with BMW Longlife-17 FE+ spec oil are still essential for longevity.
Question 3Is it worth replacing the engine in a BMW 3 Series 320e-
Given the high value of 320e models (£18,000-£35,000), a rebuilt B48 engine with warranty is a sound investment if the engine has failed. For high-mileage examples approaching the lower end of the value range, evaluate the overall condition of the car - including the hybrid battery health - before committing.
Question 4How long does a BMW 3 Series 320e engine replacement take-
A BMW 3 Series 320e engine replacement typically takes 10-14 labour hours for the B48B20A unit. The hybrid system integration means the gearbox must be handled carefully - allow 2-4 working days for the complete job with a specialist.
- Supply only: engine can be delivered next working day
- Supply & fit: allow 3-4 days for the complete job
Question 5What's the difference between the BMW 320e and 330e engine-
Both the BMW 320e and 330e use the B48 2.0-litre four-cylinder petrol engine - but they are tuned differently.
- 320e: 163 hp petrol engine + 109 hp electric motor = 204 hp system output
- 330e: higher petrol engine output + more powerful electric motor = up to 292 hp system output
- The 320e offers better value and lower running costs, while the 330e delivers significantly more performance
Question 6What are the common problems with the BMW 320e B48 engine-
The B48 engine in the BMW 3 Series 320e is generally reliable. Common issues include:
- Coolant leaks from the water pump and expansion tank
- PCV valve failure
- High-pressure fuel pump issues
- Carbon buildup on intake valves (direct injection-specific)
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Comparing quotes for your BMW 3 Series 320e engine replacement is free, quick and carries no obligation. Whether you need a used B48B20A, a reconditioned unit with warranty, or a rebuilt engine with upgraded components, EnginesMarket connects you with vetted UK specialists who know BMW 3 Series 320e hybrid systems inside out. Enter your registration above and get tailored quotes in minutes.
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