BMW X3 G01 Engines -The Complete UK Guide
Every engine fitted to the third-generation X3 G01 -from the 2.0-litre B48 four-cylinder petrol in the sDrive20i and xDrive30i, to the 3.0-litre B58 six-cylinder in the M40i, the S58-powered X3 M, and the full range of B47 and B57 diesel options for UK buyers. Real UK costs, honest reliability data, and the 2021 LCI updates that kept BMW's best-selling SUV competitive. Backed by 182+ real UK G01 enquiries in 2025 [BMW-VERIFIED].
Explore G01 Engines
BMW X3 G01 Engine Codes -The Complete Database
Every engine fitted to the G01 X3 -from the entry-level sDrive18d to the range-topping X3 M Competition, including the plug-in hybrid xDrive30e.
Overview
BMW X3 G01 -Overview
The BMW X3 G01 is the third generation of BMW's compact luxury crossover SUV, unveiled in June 2017 with production commencing in August 2017.
Built on BMW's CLAR platform, the G01 brought significant improvements in interior space, technology, and driving dynamics over its F25 predecessor. Designed by Calvin Luk, the G01 is manufactured at BMW's Spartanburg plant in the USA and Rosslyn plant in South Africa. The engine range includes B48 four-cylinder petrols (sDrive20i, xDrive20i, xDrive30i, and the xDrive30e plug-in hybrid), the B58 six-cylinder petrol in the M40i, the S58 in the X3 M and X3 M Competition, and B47/B57 diesels ranging from the sDrive18d to the M40d. A facelift (LCI) was introduced in 2021, and production ended in 2024.
Key Facts
Platform
BMW CLAR platform
Predecessor
BMW X3 F25
Successor
BMW X3 G45
Sibling body styles in this generation
None (X4 G02 is a separate model line)
Market Intelligence
The BMW X3 G01 generated 182 real UK engine enquiries in 2025 [EM-VERIFIED], concentrated on the B47 diesel fours and B58 petrol sixes as these SUVs age out of warranty.
Best & Worst Engines
Best Diesel Overall
B57D30B (xDrive30d, 2017–2024)
“The 3.0-litre straight-six diesel produces 265 PS and 620 Nm -effortless, refined, and with the kind of torque that makes the G01 a genuine long-distance cruiser. The B57 is chain-driven and proven across the BMW range. In the X3, it's the diesel you buy if you want six-cylinder refinement without M40d running costs.”
Who it's for: buyers who want effortless torque and strong economy from a six-cylinder diesel.
Best Petrol Overall
B58B30O1 / B58B30B (M40i, 2017–2024)
“The B58 is BMW's modular straight-six masterpiece -360 PS, 500 Nm, silky smooth, and chain-driven with a robust bottom end. The B58 is widely regarded as one of BMW's most reliable modern engines. In the G01 X3, it's the engine that defines the performance SUV experience.”
Who it's for: buyers who want six-cylinder performance with proven reliability. (Model-wide: B58B30 is the benchmark across the BMW range -the G01 offers one of the best expressions of it in an SUV.)
Highest Risk
B48B20A (sDrive20i / xDrive20i, early production)
“The B48 is a robust engine overall, but early production units can suffer from coolant leaks from the cylinder head vent line (coolant hose) -the plastic becomes brittle and snaps around 60,000 km, dumping coolant instantly. B48TU engines also have documented oil consumption issues.”
Who it's for: buyers who want entry-level X3 ownership with a budget for cooling system maintenance.
Most Expensive Failure
S58B30A (X3 M / X3 M Competition)
“The S58 is the high-performance M-division engine -up to 510 PS, twin-turbo, and complex. Turbocharger wear, cooling system demands, and M-specific component costs all add to the ownership burden. A full engine replacement sits at £8,000–£16,000.”
Who it's for: X3 M buyers who budget for high-end maintenance and have a specialist they trust.
Best Value
B47D20A / B47D20B (xDrive20d, 2017–2024)
“The xDrive20d's 2.0-litre four-cylinder diesel produces 190 PS and 400 Nm -the most efficient engine in the range, returning up to 50 mpg. The B47 is chain-driven with an accessible front-mounted chain -none of the N47's rear-chain anxiety. It's the X3 you can buy without diesel anxiety.”
Who it's for: high-mileage buyers who prioritise economy and reliability.
Most Overlooked
B48B20A (xDrive30e, 2017–2024)
“The xDrive30e plug-in hybrid combines the B48B20A petrol engine with an electric motor for 292 PS and electric-only range. It's the most fuel-efficient petrol option for urban buyers and offers the lowest company car tax. The B48's cooling system issues are the only caveat.”
Who it's for: buyers who want petrol refinement with EV running costs for short journeys.
BMW X3 G01 -Ownership Economics
The G01 rule
A £4,500–£7,500 B58 recon against a £15,000–£45,000 G01 sits at 10–50% of the car's value -well within our 70% BMW threshold. Even the most expensive engine replacement (X3 M Competition S58 at £9,000–£16,000) is only 20–107% of a well-kept G01's value. On a sub-£15,000 high-mileage X3 M, that crosses our 70% threshold -we'd advise walking away. Value the car first. Extended warranty cover is strongly recommended, especially for S58 models and the 48V mild-hybrid system.
Common Problems
G01 Engine Replacement Costs -By Engine and Condition
Core Variants
Diesel & Petrol Lineup
Scope note: All variants listed are G01 X3 SUV only (2017–2024). The X3 M is designated F97 but is included on this page as it shares the G01 platform. The sDrive20i and sDrive18d are rear-wheel drive; all other variants are xDrive (all-wheel drive). The xDrive30e is a plug-in hybrid combining the B48B20A petrol engine with an electric motor for a combined 292 PS. The M40i uses the B58B30O1 (360 PS). The M40d uses the B57D30B (326 PS). The X3 M uses the S58B30A (480 PS) and the X3 M Competition produces 510 PS.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. B47D20A/B (930 enquiries [EM-VERIFIED])
- 2.2. B58B30O1/B (540 enquiries [EM-VERIFIED])
- 3.3. B57D30B (830 enquiries [EM-VERIFIED])
Most Requested E90 Variants
- 1.1. xDrive20d
- 2.2. M40i
- 3.3. xDrive30d
Average E90 Replacement Cost
£2,800–£8,500 supply only [BMW-QUOTE]
Most Common E90 Failures
- 1.1. B48 coolant leaks (cylinder head vent line)
- 2.2. B47 timing chain wear
- 3.3. S58 turbocharger/cooling system wear
BMW X3 xDrive20d
G01 (B47)
5
enquiries
BMW X3 M40i
G01 (B58)
4
enquiries
BMW X3 M Competition
G01 (S58)
2
enquiries
FAQ
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