Engines Market

BMW X3 G01 30i SPECIALISTS

BMW X3 G01 30i Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK BMW X3 G01 30i engine specialists. Compare prices on reconditioned, rebuilt and used engines for your third-generation X3 30i - supply and fit available across the UK.

Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
BMW X3 G01 30i Engine
from£1,800 to £3,800
  • Usedfrom £1,500
  • Reconditionedfrom £1,800
  • Common codesB48B20, B48B20A, B48B20B
BMW x3 G01 30i Used Engine — B48B20BMW x3Used Engine — B48B20BMW x3 G01 30i Reconditioned Engine — B48B20BMW x3Reconditioned Engine — B48B20BMW x3 G01 30i Rebuilt Engine — B48B20BMW x3Rebuilt Engine — B48B20

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW X3 G01 30i Engine History & Specs at a Glance

The BMW X3 G01 30i joined the third-generation X3 range as the mid-range petrol option, offering a responsive 2.0-litre turbocharged four-cylinder in an all-wheel-drive package. Over the G01 production run, the 30i badge carried the modular B48 engine family with a clear step up in power and refinement over the outgoing N20.

BMW X3 G01 30i
  1. 2017

    G01 generation launches; 30i debuts with B48B20, 2.0-litre four-cylinder petrol, 252hp, 350Nm torque, all-wheel drive

  2. 2018

    xDrive30i M Sport becomes a popular UK trim level

  3. 2019

    B48B20 receives minor ECU calibration updates for improved throttle response

  4. 2020

    48V mild hybrid system introduced on some G01 variants (not all 30i models)

  5. 2022

    G01 LCI facelift; 30i continues with B48B20, now with 48V MHEV on some variants

  6. 2024

    G01 production ends; G45 generation launches with updated powertrains

Every engine fitted to the BMW X3 G01 30i is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

BMW X3 G01 30i Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

B48B20 — 2.0 Petrol (2017-2024) engine

B48B20 — 2.0 Petrol (2017-2024)

Power Output
252hp, 350Nm torque
Years Fitted
2017-2024

Can’t find your exact engine code?-> Get quotes for B48B20 BMW X3 G01 30i engine replacement

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Common Problems

BMW X3 G01 30i Engine Problems Repair Cost vs Replacement

The BMW X3 G01 30i is powered by the B48B20 2.0-litre turbo petrol engine - part of BMW's modular B-series family. The B48 is generally reliable and capable of 150,000+ miles with proper maintenance. However, injector seal leaks, coolant system issues, and PCV system failure are the most common failure points. Every rebuilt engine supplied through EnginesMarket includes upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Coolant System Failure

Affected
BMW X3 G01 30i (B48B20, 2017-2024)
Typical failure mileage
40,000-80,000 miles
Root cause
The factory plastic coolant expansion tank becomes brittle under repeated thermal cycling, leading to micro-fractures. Combined with thermostat housing degradation and coolant hose connection wear, this causes rapid coolant loss and potential head gasket stress.

Repair options

Repair tierDealer priceSpecialist price
Thermostat and hose replacement£450-£700£280-£450
Coolant system overhaul£800-£1,200£550-£850
Full Replacement - rebuilt/reconditioned engine£4,500-£6,500£2,800-£4,500
Our recommendation
If your BMW X3 G01 30i is losing coolant but shows no misfires or white exhaust smoke, a full coolant system overhaul (£550-£850 at a specialist) is highly cost-effective. However, if the temperature gauge has spiked or coolant has contaminated the oil, internal warping is likely occurring. At that stage, a rebuilt engine is the only reliable path.
-> Compare rebuilt B48B20 BMW X3 G01 30i engine prices

Injector Seal Leaks

Affected
BMW X3 G01 30i (B48B20, 2017-2024)
Typical failure mileage
50,000-100,000 miles
Root cause
The injector seals can degrade over time, allowing fuel to leak past the seal and into the engine oil. This causes oil dilution, reducing lubrication quality and increasing wear on bearings and timing chain components.

Repair options

Repair tierDealer priceSpecialist price
Injector seal replacement£600-£1,000£400-£700
Full injector replacement£1,200-£2,000£800-£1,400
Full Replacement - rebuilt/reconditioned engine£4,500-£6,500£2,800-£4,500
Our recommendation
If you notice the oil level rising between services or a strong fuel smell from the oil filler cap, have the injector seals inspected immediately. A £400-£700 injector seal replacement at a specialist can save the engine. If the oil has been heavily diluted, a full oil flush and bearing inspection are essential.
-> Compare rebuilt B48B20 BMW X3 G01 30i engine prices

PCV System Failure

Affected
BMW X3 G01 30i (B48B20, 2017-2024)
Typical failure mileage
60,000-100,000 miles
Root cause
The PCV (Positive Crankcase Ventilation) diaphragm can fail, causing excessive crankcase pressure, oil consumption, and rough idle. In severe cases, it can lead to oil seal failure and increased oil consumption.

Repair options

Repair tierDealer priceSpecialist price
PCV diaphragm replacement£400-£700£250-£450
Full Replacement - rebuilt/reconditioned engine£4,500-£6,500£2,800-£4,500
Our recommendation
PCV failure is common on higher-mileage B48 engines. A £250-£450 repair at a specialist is far cheaper than a full engine rebuild. However, if excessive oil consumption has caused bearing damage, a rebuilt engine may be necessary.
-> Compare rebuilt B48B20 BMW X3 G01 30i engine prices

Don't Let Engine Failure Write Off Your BMW X3 G01 30i

The BMW X3 G01 30i is a refined and responsive petrol SUV, but its cooling system, injector seals, and PCV system require vigilance. Early detection of coolant loss, fuel dilution, or rough idle can save the engine. Every rebuilt engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty, with upgraded components addressing the original failure points. Compare quotes from UK specialists today.

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FAQ

BMW X3 G01 30i Engine ReplacementFrequently Asked Questions

Everything BMW X3 G01 30i owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

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Comparing quotes for your BMW X3 G01 30i engine replacement is free, no-obligation, and specific to your exact vehicle and engine code. Enter your registration above to connect with vetted UK specialists who stock the right engine for your G01 30i - whether you need a used unit, a reconditioned replacement, or a fully rebuilt engine with warranty.

150+150+ BMW X3 G01 30i engines supplied through our network
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