
BMW X5 G05 Engines -The Complete UK Guide
Every engine fitted to the fourth-generation X5 G05 -from the B57 diesel six to the B58 petrol six, the N63 V8 and the S68-powered X5 M. Real UK replacement costs, honest failure data, and the hot-vee V8 risks that define this generation. Backed by verified specialist data.
Explore G05 EnginesBMW X5 G05 Engine Codes -The Complete Database
Every engine fitted to the fourth-generation X5 -from the four-cylinder diesel to the six-cylinder petrol and diesel units, the V8s and the plug-in hybrid options.

Overview
BMW X5 G05 -Overview
The G05 is the fourth generation of the BMW X5, unveiled online on 6 June 2018 and entering production in August 2018 as the successor to the F15 X5.
Built on the Cluster Architecture (CLAR) platform shared with the G11 7 Series and G30 5 Series, the G05 introduced a range of new engines -including the B58 replacing the N55, and the S63-powered X5 M -along with a 48V mild-hybrid system on later models. A facelift (LCI) entered production in March 2023, bringing updated B58, B57 and S68 engines.
Key Facts
Platform
BMW CLAR (Cluster Architecture)
Predecessor
BMW X5 F15
Successor
Current model -no successor announced
Sibling body styles in this generation
G05 (standard wheelbase), G18 (long-wheelbase, China), F95 (X5 M)
Market Intelligence
As a current-generation model (2018–present), the G05 is still establishing its long-term reliability profile -but the B58 engine is already developing a reputation as one of BMW's most dependable modern six-cylinders, while the N63 V8 remains the most complex option.
Best & Worst Engines

Thin-Data Summary
“The G05's engine range is modern, efficient and broadly dependable. The B58 3.0-litre straight-six (xDrive40i, 2018–present) is the standout -329–381 bhp, smooth power delivery, and a reputation for bulletproof reliability that has made it one of BMW's most dependable modern engines. The B57 3.0-litre diesel six (xDrive30d/xDrive40d) is the torque king -261–352 bhp and up to 700 Nm of effortless pulling power, with mild-hybrid assistance on later models. The N63 4.4-litre twin-turbo V8 (xDrive50i/M50i) delivers 456–523 bhp but retains the hot-vee architecture that can lead to heat-related issues on high-mileage examples. The S68 in the M60i (2023–present) replaces the N63 with an updated design, while the S63 in the X5 M offers 591–617 bhp but demands meticulous maintenance. The plug-in hybrids (xDrive45e, xDrive50e) combine the B58 with an electric motor for 389–483 bhp system output. If you're buying a G05, the B58 petrol is the sensible choice; the B57 diesel is for high-mileage drivers; the N63/S63 V8s demand deeper pockets.”
Who it's for:

BMW X5 G05 -Ownership Economics
The G05 rule
A £4,000–£7,000 B58 recon against a £35,000 G05 sits at 11–20% of the car's value -well within our 70% BMW threshold. Against a £60,000 example, the same recon drops to 7–12% -a routine maintenance decision. On a G05, replacement almost always makes sense. The V8 and PHEV costs are higher but still proportional to the car's value.
Key Takeaways
Which G05 Costs Least To Own?
B58 xDrive40i -simpler than the V8, lower running costs.
Which G05 Costs Most To Own?
N63 M50i -hot-vee V8 with expensive heat-related failures.
Which G05 Is Best Value?
B58 xDrive40i -six-cylinder performance without the V8 bills.
Common Problems

G05 Engine Replacement Costs -By Engine and Condition
Core Variants
Diesel & Petrol Lineup
Scope note: All variants listed are G05-generation X5 only (2018–present). The G18 long-wheelbase variant (China market) shares most engines but is covered on its own Generation Page. The F95 X5 M is included as the high-performance variant.
Market Intelligence
Most Requested E90 Engines (2025)
Most Requested E90 Variants
Average E90 Replacement Cost
Most Common E90 Failures
FAQ

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