BMW 2 Series 230i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 2 Series 230i engine specialists. Compare prices on reconditioned, rebuilt and used engines for your BMW 230i - the 245hp performance petrol Coupe with BMW's TwinPower Turbo B48 engine.
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12-Month Warranty
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From £2,200 to £3,800
Used from £1,500 · Reconditioned from £2,200 · Common codes: B48B20O1
From £1,500
Tested, bare/short engine
From £2,200
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 2 Series 230i Replacement Engineto Finding the Best BMW 2 Series 230i Replacement Engine
Most replacements completed within 3-5 days.
BMW 2 Series 230i - Engine History & Specs at a Glance
The BMW 2 Series 230i arrived with the G42 generation in 2021, replacing the previous F22 230i. Powered by the high-output 2.0-litre B48B20O1 four-cylinder turbo petrol engine, the 230i sits between the 220i and M240i in the Coupe range, offering 245hp and 400Nm of torque in a rear-wheel-drive package.

BMW 2 Series 230i - Engine History & Specs at a Glance
The BMW 2 Series 230i arrived with the G42 generation in 2021, replacing the previous F22 230i. Powered by the high-output 2.0-litre B48B20O1 four-cylinder turbo petrol engine, the 230i sits between the 220i and M240i in the Coupe range, offering 245hp and 400Nm of torque in a rear-wheel-drive package.
BMW 2 Series 230i
Engine History Timeline
B48B20O1 2.0L turbo petrol, 245hp, 400Nm (G42 230i Coupe launch)
B48B20O1 2.0L turbo petrol, 245hp (xDrive option introduced in some markets)
B48B20O1 2.0L turbo petrol, 245hp (LCI update, minor calibration refinements)
B48B20O1 2.0L turbo petrol, 241hp (current production, OPF-equipped)
Key Specs Snapshot
Every engine fitted to the BMW 2 Series 230i is covered below, with UK rebuilt pricing and known failure points.
BMW 2 Series 230i Engine Codes - Specifications & Replacement CostBMW 2 Series 230i Engine Codes - Specifications & Replacement Cost
2.0L Petrol (2021-present)
Compatible Trim Levels
- 230i
- 230i M Sport
- 230i M Sport Pro
- 230i xDrive (all-wheel drive adds ~1hr to fitting labour)

Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,200
Reconditioned
Addressed known issues, tested
£2,200-£3,000
Rebuilt
Full teardown, upgraded internals
£2,800-£3,800
Common Failure
Timing chain tensioner wear is documented in BMW Service Bulletin SI B11 01 18, affecting B48 petrol engines. Cold-start rattle lasting 2-5 seconds is the primary symptom, often accompanied by fault codes P000A, P0016, or P0017. Oil filter housing cracking (50,000-100,000 miles) and coolant system leaks are also reported.


The BMW 2 Series 230i is powered by the B48B20O1 2.0-litre four-cylinder turbo petrol engine - part of BMW's modular B-series engine family. While generally reliable, the B48 has a few well-documented weaknesses including timing chain tensioner wear, oil filter housing cracking, and coolant system leaks. BMW acknowledged the timing chain defect and issued Service Bulletin SI B11 01 18. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.

Why the BMW 2 Series 230i B48 Engine Wears Prematurely
Affected Vehicles
BMW 2 Series 230i (B48B20O1, 2021-present)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
The B48 uses a single-row timing chain system that has proven prone to premature stretch and guide wear. Unlike older multi-row chains, this design relies on a plastic tensioner rail that degrades faster under heat stress - especially in stop-start urban driving. When the chain stretches beyond tolerance, it can skip teeth on the camshaft sprocket, throwing off valve timing and leading to valve-piston collision. BMW acknowledged the defect and issued Service Bulletin SI B11 01 18 confirming timing chain guide degradation as a known weakness.
Why It Happens
The B48 uses a single-row timing chain system that has proven prone to premature stretch and guide wear. Unlike older multi-row chains, this design relies on a plastic tensioner rail that degrades faster under heat stress - especially in stop-start urban driving. When the chain stretches beyond tolerance, it can skip teeth on the camshaft sprocket, throwing off valve timing and leading to valve-piston collision. BMW acknowledged the defect and issued Service Bulletin SI B11 01 18 confirming timing chain guide degradation as a known weakness.
Dealer (parts + labour)
£900-£1,400
Specialist (parts + labour)
£600-£1,000
What it involves
Replace tensioner only
Suitability
Effective if caught very early
Dealer (parts + labour)
£2,200-£3,200
Specialist (parts + labour)
£1,500-£2,200
What it involves
Replace chain, guides, tensioner, VANOS units
Suitability
Recommended if rattle is persistent or mileage >70k
Dealer (parts + labour)
£4,500-£6,000
Specialist (parts + labour)
£2,800-£3,800 (matches Section 4's rebuilt figure for B48B20O1)
What it involves
Supply & fit, upgraded timing components, 12-month warranty
Suitability
The right call if chain has skipped teeth or caused valve damage
| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
Timing chain tensioner replacement Minor | £900-£1,400 | £600-£1,000 | Replace tensioner only | Effective if caught very early | |
Full timing chain kit replacement Best Value | £2,200-£3,200 | £1,500-£2,200 | Replace chain, guides, tensioner, VANOS units | Recommended if rattle is persistent or mileage >70k | |
Full Replacement - rebuilt/reconditioned engine Best Value | £4,500-£6,000 | £2,800-£3,800 (matches Section 4's rebuilt figure for B48B20O1) | Supply & fit, upgraded timing components, 12-month warranty | The right call if chain has skipped teeth or caused valve damage |
Our Recommendation
Our Recommendation
The B48 timing chain issue is well-documented in BMW Service Bulletin SI B11 01 18. If you hear a metallic rattle on cold start lasting 2-5 seconds, have the car inspected immediately. A full timing chain kit replacement with upgraded components is the most cost-effective long-term solution. Given the high value of most 230i examples, a rebuilt engine with a 12-month warranty is often the most sensible long-term investment.

Don't Let Engine Failure Write Off Your BMW 2 Series 230i
The B48 engine is fundamentally robust, but timing chain tensioner wear, oil filter housing cracks, and cooling system issues can escalate quickly if ignored. With rebuilt engines available from £2,800, a 12-month warranty on every unit, and nationwide delivery and fit options, replacing your 230i engine through EnginesMarket is often more cost-effective than main dealer repairs.
Compare rebuilt B48B20O1 BMW 2 Series 230i engine prices
Important Information
Important Information
BMW 2 Series 230i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 2 Series 230i engine replacement cost in the UK-
A BMW 2 Series 230i engine replacement typically costs between £2,200 and £3,800 depending on the condition (used, reconditioned, or rebuilt). Used engines start from around £1,500, reconditioned units from £2,200, and fully rebuilt engines with a 12-month warranty from £2,800. Labour for supply and fit adds approximately £800-£1,500 depending on the workshop. Main dealer replacement costs can exceed £4,500.
- Used: £1,500-£2,200
- Reconditioned: £2,200-£3,000
- Rebuilt: £2,800-£3,800
Question 2What are the signs of timing chain failure in a BMW 2 Series 230i-
The most common early warning sign is a metallic rattling noise from the engine on cold start, which typically lasts 2-5 seconds before disappearing as oil pressure builds. BMW issued Service Bulletin SI B11 01 18 confirming timing chain guide degradation as a known weakness in B48 engines. Other symptoms include a metallic ticking sound, engine hesitation, and in severe cases, the engine management light illuminating with fault codes P000A, P0016, or P0017.
- Rattling on cold start is the primary symptom
- Can develop from 60,000-100,000 miles
- Ignoring it can lead to catastrophic engine failure
Question 3Is it worth replacing the engine in a BMW 2 Series 230i-
It depends on the vehicle's value and the extent of the damage. For a 230i worth £20,000-£30,000 (typical for 2021-2023 models), replacement is almost always justified. If the car is worth under £5,000, a used engine or repair may be more cost-effective. Given the relatively high value of most 230i examples, a rebuilt engine with a 12-month warranty is often the most sensible long-term investment.
- Vehicle value is the key deciding factor
- Rebuilt engines come with a 12-month warranty for peace of mind
- Compare quotes to find the best value option
Question 4How long does a BMW 2 Series 230i engine replacement take-
A typical BMW 2 Series 230i engine replacement takes 3-5 working days from order to completion, assuming the engine is in stock. Supply-only orders are usually dispatched within 1-2 working days. Supply and fit through our specialist network typically takes 3-5 days, including delivery, fitting, and ECU calibration.
- Supply only: 1-2 days
- Supply and fit: 3-5 working days
- Timelines vary by workshop and engine availability
Question 5What's the difference between the 230i and the 220i engine-
The BMW 230i uses a high-output 2.0-litre B48B20O1 engine producing 245hp and 400Nm of torque, while the 220i uses a lower-output version of the same B48 family producing 181-184hp. The 230i offers significantly more power and torque, with a 0-62mph time of 5.7-5.9 seconds compared to 7.3 seconds for the 220i.
- 230i: 2.0L 4-cyl, 245hp, 400Nm, 5.7s 0-62mph
- 220i: 2.0L 4-cyl, 181-184hp, 5.7s 0-62mph
- 230i is the performance petrol variant below the M240i
Question 6Will a replacement BMW 2 Series 230i engine pass the MoT-
Yes - all engines supplied through EnginesMarket are MoT emissions compliant. Rebuilt and reconditioned engines are tested to ensure they meet the original emissions standards for the vehicle's year. For 230i models with OPF (Otto Particulate Filter), compliance is confirmed before dispatch.
- All engines meet OEM emissions standards
- Rebuilt units include upgraded components
- MoT readiness is confirmed before supply
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