BMW M235i SPECIALISTS

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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BMW 2 Series M235i Engine Replacement engine
BMW 2 Series M235i

From £2,400 to £4,500

Used from £1,600 · Reconditioned from £2,400 · Common codes: N55B30, N55B30A, B48A20O1, B48A20O0

Used

From £1,600

Tested, bare/short engine

Reconditioned

From £2,400

Rod bearings addressed, tested

Rebuilt

From quote

Upgraded bearings, full teardown, revised valvetrain

M235i
BMW 2 Series M235i Engine Replacement
UK
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How It Works

3 Simple Stepsto Finding the Best BMW 2 Series M235i Replacement Engine

12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers

Most replacements completed within 3-5 days.

Variant History

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

BMW 2 Series M235i

Fuel TypePetrol
Engine Size3.0L (N55) / 2.0L (B48)
Power Output306-326hp across the variant's history

Engine History Timeline

2014

N55B30 3.0L turbo inline-six, 326hp, 450Nm (F22 Coupe, F23 Convertible launch)

2014

N55B30A 3.0L turbo inline-six, 326hp (xDrive variant introduced)

2016

N55 engine discontinued; M235i replaced by M240i with B58 engine

2019

B48A20O1 2.0L turbo four-cylinder, 306hp (F44 M235i xDrive Gran Coupe launch)

2021

B48A20O0 2.0L turbo four-cylinder, 306hp (Gran Coupe update)

2023

B48A20O1 2.0L turbo four-cylinder, 306hp (Gran Coupe LCI refinement)

Key Specs Snapshot

Fuel TypePetrol
Engine Size3.0L (N55) / 2.0L (B48)
Power Output306-326hp across the variant's history
Torque450Nm across both engine generations
Years Produced2014-2016 (F22/F23); 2019-2024 (F44)

Every engine fitted to the BMW 2 Series M235i is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

BMW 2 Series M235i Engine Codes - Specifications & Replacement Cost

N55B30

3.0L Petrol (2014-2016)

Power Output326hp (240kW)
Torque450Nm
Years Fitted2014-2016

Compatible Trim Levels

  • M235i
  • M235i M Performance
  • M235i xDrive (all-wheel drive adds ~1hr to fitting labour)
  • M235i Convertible
N55B30 engine
N55B30 quote
Get quotes for N55B30

BMW 2 Series M235i engine replacement

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Cost Guide

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.

Early diagnosis is recommended if symptoms appear, especially on higher-mileage examples where damage can escalate quickly.
Bearing damage
Common Problems
BMW 2 Series M235i Engine Problems - Repair Cost vs Replacement

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.

Charge Pipe Failure
Charge Pipe Failure

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.

Repair Options & Estimated Costs (UK Ranges)
Charge pipe replacement

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

1 - 2 days
Full turbo system inspection

Dealer (parts + labour)

£300-£600

Specialist (parts + labour)

£150-£350

What it involves

Check turbo, wastegate, boost hoses

Suitability

Recommended if boost issues persist

1 - 2 days
All prices are indicative UK market ranges based on current UK specialist supplier data.

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

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Important Information

FAQ

BMW 2 Series M235i Engine ReplacementFrequently Asked Questions

How 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
-> Get a tailored quote for your BMW 2 Series M235i

What 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
-> If you experience boost loss, get a diagnostic check immediately

Is 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
-> Check your M235i's value and compare engine prices

How 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
-> Book your BMW 2 Series M235i engine replacement

What'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
-> Compare M235i and M240i engine prices

Will 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
-> Get an MoT-compliant BMW 2 Series M235i engine quote
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