BMW 3 Series 330e2015–presentB48 + e-Motor
BMW 3 Series 330e Engine Replacement —Compare Prices &
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Get quotes today from trusted UK BMW 330e specialists. Compare reconditioned, rebuilt and used B48 petrol engines and hybrid drive units — supply & fit available nationwide.
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BMW 330e Engines — from £2,500 to £8,000Common code: B48B20 + e-Motor
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- Used
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The 330e Through Time — Era Map
Two generations. Two eras. One guide to reliability, costs and what really matters.
Era Note
First-generation 330e — proven B48 petrol combined with hybrid system; battery degradation is the main watchpoint.
Era Note
Modern 330e — improved battery capacity and electric range; B48 remains reliable, but hybrid system complexity adds repair considerations.
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 UKCost Data
- VerifiedReliability
- ExpertInsights
- Updated for2025
BMW 3 Series 330e Engine Replacement Costs
- Supply Only£2,500 – £4,000
- Fitted (Indie)£3,300 – £5,100
- Warranty1–6 months
- Best ForBudget priority; vehicle under £8,000
- Supply Only£3,500 – £6,000
- Fitted (Indie)£4,500 – £7,300
- Warranty12–24 months
- Best ForMost owners — best cost/warranty balance
- Supply Only£5,000 – £8,000
- Fitted (Indie)£6,000 – £9,300
- Warranty12–24 months
- Best ForLong-term ownership; 3+ year horizon
- Supply Only£9,000 – £14,000
- Fitted (Indie)£10,500 – £16,000
- Warranty24–36 months
- Best ForInsurance jobs, warranty claims; high-voltage system requires specialist equipment
Labour estimate: Fitting a 330e engine and hybrid system typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). Hybrid system work requires specialist high-voltage training.
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330e — 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 |
|---|---|---|---|
| Battery degradation (330e) | Depends | £2,000 – £5,000 | Cell replacement is viable if caught early; full pack replacement is expensive |
| Electric motor cooling pump failure (330e) | Yes | £800 – £1,500 | Straightforward replacement; don't ignore cooling warnings |
| Charging system failure (330e) | Yes | £1,000 – £2,500 | Control unit or charging port replacement; specialist required |
| Water pump failure (B48) | Yes | £500 – £1,200 | Preventative — replace at 60,000 miles |
| Timing chain wear (B48) | Yes | £1,500 – £2,500 | If caught early; far less common than N47 issues |
| Hybrid transmission failure | Sometimes | £4,000 – £8,000 | Assess against vehicle value; often cheaper to replace the whole unit |
Battery degradation (330e)
Cell replacement is viable if caught early; full pack replacement is expensive
Electric motor cooling pump failure (330e)
Straightforward replacement; don't ignore cooling warnings
Charging system failure (330e)
Control unit or charging port replacement; specialist required
Water pump failure (B48)
Preventative — replace at 60,000 miles
Hybrid transmission failure
Assess against vehicle value; often cheaper to replace the whole unit
Buying This 330e? 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 use — hybrid systems prefer regular charging and driving
- Post-2023 build for the larger 19.5kWh battery and improved range
Avoid if:
- Drivetrain warning lights with no diagnosis
- Significantly reduced electric range compared to new (below 70% of original)
- No service history — the B48 is reliable but the hybrid system demands maintenance
- Charging issues — the car won't charge or takes significantly longer than expected
Closing verdict
The 330e is a compelling hybrid, combining the proven B48 petrol engine with an efficient electric motor. The B48 itself is one of BMW's most reliable engines, but the hybrid system adds complexity. Buy on battery health and service history — these are not just another 3 Series.
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Buying Checklist
Before you buy a used BMW 330e (or before you commit to an engine replacement), check these:
1. Battery Health
What is the current electric range compared to new? Check the battery health report
2. Cold Start
Listen for any rattle on startup (timing chain wear — far less common on B48 than N47)
3. Service History
Including which engine era (F30 B48 or G20 B48) and hybrid system maintenance
4. Charging System
Does the car charge correctly? Any error messages?
5. Drivetrain Warning
Any warning lights on the dash? Have codes been read?
6. Electric Range
Test the electric range in real conditions; significant loss indicates battery degradation
7. Regenerative Braking
Does it function correctly? Any unusual noises from the transmission?
8. MOT History
Check for emissions-related failures; the B48 should pass easily if well-maintained
Buying Checklist
Before you buy a used BMW 330e (or before you commit to an engine replacement), check these:
- 1
Battery Health
What is the current electric range compared to new? Check the battery health report
- 2
Cold Start
Listen for any rattle on startup (timing chain wear — far less common on B48 than N47)
- 3
Service History
Including which engine era (F30 B48 or G20 B48) and hybrid system maintenance
- 4
Charging System
Does the car charge correctly? Any error messages?
- 5
Drivetrain Warning
Any warning lights on the dash? Have codes been read?
- 6
Electric Range
Test the electric range in real conditions; significant loss indicates battery degradation
- 7
Regenerative Braking
Does it function correctly? Any unusual noises from the transmission?
- 8
MOT History
Check for emissions-related failures; the B48 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 3 Series 330e pitfalls.
Engine Codes
B48B20 + e-Motor (F30)
- Years
- 2015–2019
- Power
- 252 bhp (total) / 87–88 Ah battery
- 2025 Enquiries
- —(pattern data)
- Avg. Recon Cost
- £3,000–£5,500[PLACEHOLDER]
B48B20 + e-Motor (G20)
- Years
- 2019–present
- Power
- 292 bhp (total) / larger battery
- 2025 Enquiries
- —(pattern data)
- Avg. Recon Cost
- £3,500–£6,500[PLACEHOLDER]
Technical SpecsB48 + e-Motor
- Displacement (B48)
- 1,998cc
- Cylinders
- 4-cylinder inline
- Compression Ratio
- 10.2:1
- Fuel System
- Direct injection
- Turbocharger
- Single twin-scroll turbo
- Electric Motor
- Integrated into 8-speed automatic transmission
- Battery
- 12kWh (F30) / 12kWh (G20 pre-2023) / 19.5kWh (G20 2023+)
Market Intelligence
Real data from thousands of 3 Series 330e enquiries in 2025.
Most Common FailureBattery degradation and hybrid system issues
50%
of 330e enquiries
[PATTERN DATA]Average Enquiry Mileage
58,000
miles
[PATTERN DATA]Average Replacement Cost
£4,500
reconditioned, supply only
[PLACEHOLDER]Most Requested Engine Code
B48B20 + e-Motor
[BMW-VERIFIED]Peak Enquiry Season
Summer
Battery performance declines in heat; cooling system issues worsen
[PATTERN DATA]Regional Demand
- London
- 25%
- South East
- 20%
- South West
- 12%
- Other Regions
- 43%
Regional Demand Breakdown
Frequently Asked Questions
A reconditioned B48 engine for the 330e typically costs £3,500–£6,500 supply only depending on generation, with the G20 version sitting at the higher end. Fitting adds £1,000–£1,500. The hybrid system components (battery, electric motor) are additional costs if they need replacement. Use our calculator for a figure specific to your car.
The B48 petrol engine is rated ★★★★☆ — it's one of BMW's most reliable modern engines. However, the 330e's hybrid system adds complexity: battery degradation is expected over time, and electric motor cooling issues can occur. The G20 generation (2019+) offers improved battery capacity and range over the F30.
Battery degradation (range loss), electric motor and charging system issues, and B48 coolant system failures are the most common. The B48 itself is reliable, but the hybrid system demands specialist attention.
Against a £8,000–£20,000 330e, a £4,500 recon engine is a manageable 22–56% of the vehicle's value — worth it for a well-maintained example. However, if the hybrid battery also needs replacement (£6,000–£12,000), assess carefully. For a G20 with high retained values, replacement is almost always viable.
Listed on the VIN plate and vehicle documentation. The 330e uses the B48 2.0-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.
The hybrid battery is separate from the engine. Cell-level replacement or module replacement is possible, costing £2,000–£5,000. If the entire battery pack needs replacement, it's significantly more expensive (£6,000–£12,000). BMW's 8-year/100,000-mile battery warranty provides some protection. The engine itself (B48) is not normally replaced for battery issues.
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.
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