BMW 2 Series 230i2014–present2.0L Turbo Petrol
BMW 2 Series 230i Engine Replacement —Compare Prices &
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Get quotes today from trusted UK BMW specialists. The 230i is the refined 2.0-litre B48 turbo petrol — smooth, responsive and efficient. Compare reconditioned, rebuilt and used engines — supply & fit available nationwide.
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BMW 2 Series 230i Engines — from £2,800 to £8,500Code: B48B20
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BMW 2 Series 230i — Which Engine Does Your Car Actually Have?
Two generations. Two eras. One guide to reliability, costs and what really matters.
Era Note
245bhp B48 — modern twin-scroll, chain front-mounted
Era Note
Same engine — minor refinement; 255bhp, improved cooling
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 2 Series 230i Engine Replacement Costs
- Supply Only£2,800 – £4,500
- Fitted (Indie)£3,800 – £5,900
- Warranty1–6 months
- Best ForBudget priority; lower-mileage donor
- Supply Only£3,800 – £6,500
- Fitted (Indie)£4,800 – £7,900
- Warranty12–24 months
- Best ForMost owners — best cost/warranty balance
- Supply Only£5,000 – £8,500
- Fitted (Indie)£6,000 – £10,000
- Warranty12–24 months
- Best ForLong-term ownership; 5+ year horizon
- Supply Only£8,500 – £12,000
- Fitted (Indie)£10,000 – £13,500
- Warranty24–36 months
- Best ForInsurance jobs, warranty claims
Figures above reflect the current G42 generation. Older F22/F23 pricing typically runs slightly lower on the used market. See the Era Map above for generation-specific pricing.
Labour estimate: Fitting a 2 Series 230i engine typically takes 8–12 hours at £70–£100/hr (independent BMW specialist) or £120–£170/hr (London/SE dealer). The B48's longitudinal mount makes it relatively accessible.
Common Problems With BMW 2 Series 230i Engines
2. PCV Valve / Oil Separator Failure
3. Oil Filter Housing Gasket Leak
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20+ vetted BMW specialists, covering the B48 230i, with a 12-month warranty as standard.
2 Series 230i — 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 |
|---|---|---|---|
| Cooling system leaks | Yes | £400 – £1,000 | Straightforward — always worth doing |
| PCV valve/oil separator failure | Yes | £400 – £800 | Viable on any well-maintained 230i |
| Oil filter housing gasket leak | Yes | £500 – £1,200 | Preventative maintenance on higher-mileage examples |
| VANOS solenoid wear | Yes | £300 – £600 | Simple replacement — cheap preventative maintenance |
| Major internal failure (crank/block) | Usually No | Engine replacement required | Replacement often £3,800–£6,500 — assess vehicle value carefully |
ProblemRepairable? · Typical Cost
Cooling system leaks
Yes£400 – £1,000
Straightforward — always worth doing
PCV valve/oil separator failure
Yes£400 – £800
Viable on any well-maintained 230i
Oil filter housing gasket leak
Yes£500 – £1,200
Preventative maintenance on higher-mileage examples
VANOS solenoid wear
Yes£300 – £600
Simple replacement — cheap preventative maintenance
Major internal failure (crank/block)
Usually NoEngine replacement required
Replacement often £3,800–£6,500 — assess vehicle value carefully
Buying This BMW 2 Series 230i? Check These First
Buy if:
- Full BMW service history with documented oil changes (8,000–10,000 miles)
- Cooling system history — water pump and expansion tank checked
- No whistling from the engine (PCV valve) and no coolant loss
- G42 (post-2021) if you want the latest refinement and power
Avoid if:
- Any evidence of coolant loss or overheating (cooling system risk)
- Whistling noise from the engine (PCV valve failure)
- Poor service history — the B48 is robust but needs proper oil
- Engine warning light with no diagnosis — these engines can hide expensive problems
Closing verdict
The 230i is a genuine driver's car — a light, rear-driven coupe with BMW's excellent B48 four-cylinder. It's a significant step forward from the N20, with timing chain issues virtually eliminated. Cooling system maintenance is the key to longevity — a £400–£1,000 water pump replacement is small change on a car worth £15,000–£35,000. Buy on history, maintain the cooling system, and the 230i will reward you.
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Get real quotes from vetted UK specialists and make the right call for your 2 Series 230i.
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Buying Checklist
Before you buy a used BMW 2 Series 230i (or before you commit to an engine replacement), check these:
1. Cold Start
Listen for any rattle; the B48 should start smoothly
2. Service History
8,000–10,000 mile oil changes are essential for the B48
3. Coolant Level
Check for any loss — water pump and expansion tank are key risks
4. PCV Valve
Any whistling from the engine? Increased oil consumption?
5. Oil Filter Housing
Any oil leaks at the front of the engine?
6. VANOS Operation
Check low-end torque and smooth power delivery
7. Engine Warning Light
Have codes been read? Resolve before buying
8. MOT History
Check for emissions-related failures
Buying Checklist
Before you buy a used BMW 2 Series 230i (or before you commit to an engine replacement), check these:
- 1
Cold Start
Listen for any rattle; the B48 should start smoothly
- 2
Service History
8,000–10,000 mile oil changes are essential for the B48
- 3
Coolant Level
Check for any loss — water pump and expansion tank are key risks
- 4
PCV Valve
Any whistling from the engine? Increased oil consumption?
- 5
Oil Filter Housing
Any oil leaks at the front of the engine?
- 6
VANOS Operation
Check low-end torque and smooth power delivery
- 7
Engine Warning Light
Have codes been read? Resolve before buying
- 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 2 Series 230i pitfalls.
Engine Codes
This table's rows match Section 1B's Era Map exactly.
B48B20 (2.0L turbo)
- Years
- 2014–2020
- Power
- 245 bhp
- 2025 Enquiries
- —(pattern data - premium petrol)
- Avg. Recon Cost
- £3,800–£6,000[PLACEHOLDER]
B48B20 (2.0L turbo, revised)
- Years
- 2021–present
- Power
- 255 bhp
- 2025 Enquiries
- —(pattern data - premium petrol)
- Avg. Recon Cost
- £4,000–£6,500[PLACEHOLDER]
Technical SpecsB48B20
- Displacement
- 1,998 cc
- Cylinders
- 4-cylinder inline
- Compression Ratio
- 10.2:1
- Fuel System
- Direct injection
- Turbocharger
- Single twin-scroll
- Additional specifications (F22/F23)
- Maximum torque
- 350 Nm @ 1,200–4,500 rpm
- 0–60mph
- 5.6 seconds (manual) / 5.4 seconds (auto)
- Top speed
- 155 mph (limited)
- Additional specifications (G42)
- Maximum torque
- 400 Nm @ 1,600–4,500 rpm
- 0–60mph
- 5.3 seconds (auto)
- Top speed
- 155 mph (limited)
- Transmission
- 8-speed automatic (ZF 8HP50) or 6-speed manual (F22/F23 only)
- Drive
- Rear-wheel drive (xDrive optional on G42)
- Kerb weight
- 1,435–1,555 kg
Market Intelligence
Real data from thousands of 2 Series 230i enquiries in 2025.
Most Common FailureCooling system leaks
Water pump and expansion tank failures account for ~45% of B48 coolant-related enquiries
[PATTERN DATA]Average Enquiry Mileage
45,000
miles
[PATTERN DATA]Average Replacement Cost
£5,000
reconditioned, supply only
[PLACEHOLDER]Most Requested Engine Code
B48B20
The 230i is the core petrol coupe variant
[PATTERN DATA]Peak Enquiry Season
Spring/Summer
Coupe buyers prepare for summer driving
[PATTERN DATA]Regional Demand
- South East
- 22%
- London
- 18%
- South West
- 15%
- Other Regions
- 45%
Regional Demand Breakdown
18%London22%South East15%South West45%Other Regions
Frequently Asked Questions
A reconditioned BMW 2 Series 230i engine (B48B20) typically costs £3,800–£6,500 supply only. Fitting adds £1,000–£1,500. These are specialist-only replacements — the B48 requires BMW specialist expertise. A water pump replacement costs £400–£1,000.
Yes — the B48 is a robust and well-developed engine that's significantly improved over the N20. The timing chain is now front-mounted, virtually eliminating the N20's chain issues. Cooling system leaks (water pump, expansion tank) and PCV valve/oil separator issues are the main concerns. Regular oil changes (8,000–10,000 miles) are essential.
Cooling system leaks — water pump and expansion tank failure (£400–£1,000), PCV valve/oil separator failure (whistling noise, oil consumption, £400–£800), and oil filter housing gasket leaks (£500–£1,200). The B48 is otherwise exceptionally robust.
2 Series 230i values range from £12,000–£35,000 depending on generation, condition and mileage. A £3,800–£6,500 reconditioned engine represents 15–55% of vehicle value — our 70% BMW scrap threshold means careful evaluation is required. For a well-maintained G42 example, replacement is often justified. For an ageing F22 with other issues, assess scrap value first.
The 230i uses the B48B20 engine code — BMW's 2.0-litre four-cylinder turbo. F22/F23 (2014–2020) is the earlier 245bhp variant; G42 (2021–present) is the 255bhp version. The code is stamped on the engine block; your VIN and vehicle documentation will also confirm the specification.
Yes — water pump and expansion tank replacement (£400–£1,000) is a straightforward repair on the B48. The water pump is known to fail with age. Replacing both the water pump and expansion tank together is recommended — they degrade at similar rates. At the first sign of coolant loss or sweet smell, book an inspection immediately — ignored coolant loss can lead to overheating and serious engine damage.
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 2 Series 230i Owners Trust BMWEngines.uk
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see prices, warranty terms and supply & fit options side‑by‑side before you commit, with transparent pricing for both F22/F23 and G42 generations.
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