BMW X6 G06 Engines -The Complete UK Guide
Every engine fitted to the third-generation X6 G06 -from the B57 six-cylinder diesel to the N63 V8 that powers the M50i, and the S63 V8 in the X6 M Competition. Real UK replacement costs, honest failure data, and the N63 hot-vee issues that still haunt high-mileage V8 cars. Backed by 288+ real UK G06 enquiries in 2025 [BMW-VERIFIED].
Explore G06 Engines
BMW X6 G06 Engine Codes -The Complete Database
Every engine fitted to the third-generation X6 G06 -from the entry-level six-cylinder diesel to the range-topping V8s in the M50i, X6 M and X6 M Competition.
Overview
BMW X6 G06 -Overview
The G06 is the third generation of the BMW X6, unveiled on 3 July 2019 and positioned as a sportier, coupé-like alternative to the X5.
Built on the CLAR platform shared with the G05 X5, the G06 adopts an even more dramatic fastback roofline and aggressive styling. The engine range spans six-cylinder petrol and diesel units through to the range-topping V8s, including the N63 in the M50i and the S63/S68 in the X6 M and X6 M Competition. A 2023 Life Cycle Impulse (LCI) brought the S68 engine with 48V mild-hybrid technology to M Competition models.
Key Facts
Platform
BMW CLAR (shared with G05 X5)
Predecessor
BMW X6 F16 (2014–2019)
Successor
Currently in production (no successor announced)
Sibling body styles in this generation
None (X6 is a standalone SAC)
Market Intelligence
The G06 X6 generated 288 real UK engine enquiries in 2025 [BMW-VERIFIED], concentrated on the B57 diesel and N63 V8 petrol units as these luxury SUVs age out of warranty and maintenance costs become a significant consideration.
Best & Worst Engines
Best Diesel Overall
B57D30B (3.0-litre straight-six, xDrive30d / xDrive40d)
“The B57 is BMW's proven straight-six diesel -the xDrive30d delivers 298 PS and 650 Nm of torque, while the xDrive40d ups that to 352 PS and 700 Nm. Both offer effortless performance and genuine 40+ MPG economy. Unlike the quad-turbo M50d, the twin-turbo B57s are proven, durable, and free of excessive complexity. Regular oil changes at 10,000-mile intervals are the key to long life.”
Who it's for: buyers who want diesel torque, six-cylinder refinement and proven reliability.
Best Petrol Overall
B58B30C / B58B30P (3.0-litre straight-six, xDrive40i)
“The B58 is BMW's modular straight-six and arguably the best engine in the G06 range -340–381 PS, 450–520 Nm of torque, and a reputation for reliability that rivals Toyota's standards. It's so good Toyota uses it in the Supra. The LCI adds 48V mild-hybrid assistance for smoother stop-start and reduced turbo lag. No V8 complexity, no N63 hot-vee issues.”
Who it's for: buyers who want the best petrol engine in the range without the V8's running costs.
Highest Risk
N63B44D / N63B44T3 (4.4-litre V8, M50i)
“The N63 V8 is a glorious engine -530 PS, 750 Nm of torque, and a soundtrack that defines the X6 experience. But it carries BMW's 'hot-vee' design, where the turbos sit inside the V of the engine, generating extreme heat. Valve stem seals harden and cause blue smoke on startup; cooling system components fail prematurely. BMW faced a class action over N63 oil consumption issues and introduced the 'N63 Customer Care Package' to address them. The G06 uses a revised N63TU4 variant that is more reliable, but awareness remains essential.”
Who it's for: buyers who want V8 power and are prepared for V8 maintenance costs.
Most Expensive Failure
S63B44B / S68B44A (4.4-litre V8, X6 M / X6 M Competition)
“The S63 is BMW's high-performance V8 -600–625 PS, 750–800 Nm of torque, making it the most powerful engine in the G06 range. It shares the N63's hot-vee architecture but adds even more power and stress. Rod bearing wear, turbocharger failure, and cooling system issues are well-documented. The S68 introduced with the LCI adds 48V mild-hybrid technology but retains the V8's complexity. A full engine replacement can exceed £16,000.”
Who it's for: collectors who want the ultimate G06 X6 and have the budget to maintain it.
Best Value
xDrive30d (B57D30B)
“The xDrive30d delivers 298 PS, 650 Nm of torque, and genuine 40+ MPG economy -the sweet spot in the G06 range. It's the most common diesel, the most proven, and the cheapest to maintain. No quad-turbo complexity, no V8 fuel bills, and an engine that's proven to exceed 200,000 miles with proper servicing.”
Who it's for: buyers who want the best all-round G06 without the V8's running costs or the M50d's complexity.
Most Overlooked
xDrive40d (B57D30B, 3.0-litre diesel, 352 PS)
“The xDrive40d is often overlooked in favour of the xDrive30d, but it delivers 352 PS and 700 Nm of torque -a genuine step up in performance. It's the perfect engine for buyers who want effortless overtaking and towing capability without stepping up to the V8's running costs. It's the G06 for buyers who actually drive their cars.”
Who it's for: buyers who want the ultimate diesel G06 with the best balance of performance and economy.
BMW X6 G06 -Ownership Economics
The G06 rule
A £6,000–£11,000 N63 recon against a £20,000–£50,000 G06 sits at 12–55% of the car's value -a repair decision, not a financial one. On a sub-£20,000 high-mileage example, that brushes our 70% BMW threshold -we'll honestly tell you to walk away. Against a well-kept £35,000+ example, the same recon drops to a routine 17–31% -a repair decision, not a financial one. Value the car first, and always check service history on V8 cars. Air suspension is a common additional cost on G06 models.
Key Takeaways
Which G06 Costs Least To Own?
xDrive30d (B57) -proven six-cylinder diesel, strong economy, no V8 or quad-turbo complexity.
Which G06 Costs Most To Own?
X6 M Competition (S63/S68 V8) -V8 running costs, rod bearing risk, specialist-only maintenance.
Which G06 Is Best Value?
xDrive40i (B58) -the best petrol engine in the range, strong residuals, the one enthusiasts want.
Common Problems
G06 Engine Replacement Costs -By Engine and Condition
Core Variants
Diesel & Petrol Lineup
Petrol Variants
Scope note: All variants listed are G06 (third-generation X6) only, produced from November 2019 onwards. All models feature xDrive all-wheel drive. The F96 X6 M is the high-performance variant with the S63 V8 (pre-LCI) and S68 V8 (LCI). The M50d features a quad-turbo diesel engine. The LCI (facelift) introduced in 2023 brought the S68 engine to M Competition models.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. B57D30B (xDrive30d/40d, 3.0-litre diesel)
- 2.2. N63B44D (M50i, 4.4-litre V8)
- 3.3. B58B30C (xDrive40i, 3.0-litre petrol) -based on UK specialist enquiry patterns [PATTERN DATA]
Most Requested E90 Variants
- 1.1. BMW X6 xDrive30d
- 2.2. BMW X6 M50i
- 3.3. BMW X6 xDrive40i -based on model-level request data [BMW‑VERIFIED]
Average E90 Replacement Cost
£4,500–£16,000 reconditioned, supply only [BMW‑QUOTE]
Most Common E90 Failures
- 1.1. N63 V8 valve stem seal & cooling system failure
- 2.2. B57 diesel EGR cooler & DPF issues
- 3.3. G06 air suspension system failure
BMW X6 M50i
G06
5
enquiries
BMW X6 xDrive40d
G06
4
enquiries
BMW X6 xDrive40i
G06
3
enquiries
FAQ
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