BMW 2 Series M235i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 2 Series M235i engine specialists. Compare prices on reconditioned, rebuilt and used engines for your BMW M235i - whether you drive the original N55-powered F22 Coupe or the B48-powered F44 Gran Coupe.
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12-Month Warranty
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From £2,400 to £4,500
Used from £1,600 · Reconditioned from £2,400 · Common codes: N55B30, N55B30A, B48A20O1, B48A20O0
From £1,600
Tested, bare/short engine
From £2,400
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 M235i Replacement Engineto Finding the Best BMW 2 Series M235i Replacement Engine
Most replacements completed within 3-5 days.
BMW 2 Series M235i - Engine History & Specs at a Glance
The BMW 2 Series M235i arrived in 2014 as the first M Performance model in the 2 Series range, powered by BMW's acclaimed N55 3.0-litre inline-six turbo engine producing 326hp. In 2020, the M235i badge was revived for the F44 Gran Coupe, now powered by a high-output 2.0-litre B48 four-cylinder turbo producing 306hp - a very different character but carrying the same M Performance mantle.

BMW 2 Series M235i - Engine History & Specs at a Glance
The BMW 2 Series M235i arrived in 2014 as the first M Performance model in the 2 Series range, powered by BMW's acclaimed N55 3.0-litre inline-six turbo engine producing 326hp. In 2020, the M235i badge was revived for the F44 Gran Coupe, now powered by a high-output 2.0-litre B48 four-cylinder turbo producing 306hp - a very different character but carrying the same M Performance mantle.
BMW 2 Series M235i
Engine History Timeline
N55B30 3.0L turbo inline-six, 326hp, 450Nm (F22 Coupe, F23 Convertible launch)
N55B30A 3.0L turbo inline-six, 326hp (xDrive variant introduced)
N55 engine discontinued; M235i replaced by M240i with B58 engine
B48A20O1 2.0L turbo four-cylinder, 306hp (F44 M235i xDrive Gran Coupe launch)
B48A20O0 2.0L turbo four-cylinder, 306hp (Gran Coupe update)
B48A20O1 2.0L turbo four-cylinder, 306hp (Gran Coupe LCI refinement)
Key Specs Snapshot
Every engine fitted to the BMW 2 Series M235i is covered below, with UK rebuilt pricing and known failure points.
BMW 2 Series M235i Engine Codes - Specifications & Replacement CostBMW 2 Series M235i Engine Codes - Specifications & Replacement Cost
3.0L Petrol (2014-2016)
Compatible Trim Levels
- M235i
- M235i M Performance
- M235i xDrive (all-wheel drive adds ~1hr to fitting labour)
- M235i Convertible

Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,600-£2,400
Reconditioned
Addressed known issues, tested
£2,400-£3,400
Rebuilt
Full teardown, upgraded internals
£3,200-£4,500
Common Failure
The N55's plastic charge pipe is notoriously prone to failure under boost pressure. Oil starvation under sustained hard cornering is also documented. Timing chain guide wear can occur from 80,000-120,000 miles.


The BMW 2 Series M235i has been powered by two very different engines: the N55 3.0-litre inline-six (2014-2016) and the B48 2.0-litre four-cylinder (2019-2024). The N55 is renowned for its character but suffers from plastic charge pipe failure and oil starvation under hard use. The B48 is more modern but has its own plastic component weaknesses. 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 M235i N55 Engine Loses Boost
Affected Vehicles
BMW 2 Series M235i (N55B30, N55B30A, 2014-2016)
Typical Failure Mileage
40,000-80,000 miles
Root Cause
The N55's plastic charge pipe is notoriously prone to failure under boost pressure. The pipe connects the turbocharger to the intercooler and can crack or blow off completely, resulting in a sudden loss of boost, reduced power, and a drivetrain malfunction warning. This is widely considered a design flaw in the N55 engine.
Why It Happens
The N55's plastic charge pipe is notoriously prone to failure under boost pressure. The pipe connects the turbocharger to the intercooler and can crack or blow off completely, resulting in a sudden loss of boost, reduced power, and a drivetrain malfunction warning. This is widely considered a design flaw in the N55 engine.
Dealer (parts + labour)
£600-£1,000
Specialist (parts + labour)
£350-£650
What it involves
Replace with upgraded aluminium pipe
Suitability
Effective; upgraded unit eliminates future failure
Dealer (parts + labour)
£300-£600
Specialist (parts + labour)
£150-£350
What it involves
Check turbo, wastegate, boost hoses
Suitability
Recommended if boost issues persist
| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
Charge pipe replacement Minor | £600-£1,000 | £350-£650 | Replace with upgraded aluminium pipe | Effective; upgraded unit eliminates future failure | |
Full turbo system inspection Best Value | £300-£600 | £150-£350 | Check turbo, wastegate, boost hoses | Recommended if boost issues persist |
Our Recommendation
Our Recommendation
Charge pipe failure is a well-known weakness on the N55 M235i. Upgrading to an aluminium charge pipe is a relatively inexpensive fix that prevents future failure. If the engine has suffered catastrophic boost-related damage, a rebuilt engine with upgraded components is the safest option.

Don't Let Engine Failure Write Off Your BMW 2 Series M235i
The N55's charge pipe and oil starvation issues, and the B48's plastic component weaknesses, are the critical failure points on the M235i. With rebuilt engines available from £2,800, a 12-month warranty on every unit, and nationwide delivery and fit options, replacing your M235i engine through EnginesMarket is often more cost-effective than main dealer repairs.
Compare rebuilt N55B30 BMW 2 Series M235i engine prices
Important Information
Important Information
BMW 2 Series M235i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 2 Series M235i engine replacement cost in the UK-
A BMW 2 Series M235i engine replacement typically costs between £2,400 and £4,500 depending on the condition (used, reconditioned, or rebuilt) and the specific engine code. Used engines start from around £1,600, reconditioned units from £2,400, 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 £5,000.
- Used: £1,600-£2,400
- Reconditioned: £2,200-£3,400
- Rebuilt: £2,800-£4,500
Question 2What are the signs of charge pipe failure in a BMW 2 Series M235i-
The most common symptom is a sudden loss of power accompanied by a "drivetrain malfunction" warning on the iDrive screen. You may also hear a loud whooshing noise from the engine bay under acceleration. The N55's plastic charge pipe is notoriously prone to failure under boost pressure. If this happens, the car will enter limp mode to protect the engine.
- Sudden loss of power is the primary symptom
- Drivetrain malfunction warning appears
- Upgrading to an aluminium charge pipe prevents recurrence
Question 3Is it worth replacing the engine in a BMW 2 Series M235i-
It depends on the vehicle's value and the extent of the damage. For a 2014-2016 M235i worth £10,000-£18,000, a reconditioned engine at £2,400-£3,400 is often worthwhile if you plan to keep the car. For F44 Gran Coupe models (2020+) worth £20,000-£30,000, replacement is almost always justified. If the car is worth under £5,000, a used engine or repair may be more cost-effective.
- 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 M235i engine replacement take-
A typical BMW 2 Series M235i 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 M235i and the M240i-
The BMW M235i (2014-2016) uses the N55 3.0-litre inline-six producing 326hp, while the M240i (2017-2021) uses the newer B58 3.0-litre inline-six producing 340hp. The M240i replaced the M235i in the F22/F23 generation. The M235i name was later revived for the F44 Gran Coupe (2019-2024) with a B48 2.0-litre four-cylinder producing 306hp.
- M235i (F22): N55 3.0L I6, 326hp
- M240i (F22): B58 3.0L I6, 340hp
- M235i (F44): B48 2.0L I4, 306hp
Question 6Will a replacement BMW 2 Series M235i 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 M235i 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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