BMW 5 Series G30 Engines -The Complete UK Guide
Every engine fitted to the G30-generation BMW 5 Series -from the 2.0-litre B48 four-cylinder to the 3.0-litre B58 six and the 4.4-litre N63 V8. Real UK costs, honest failure data, and the B57 diesel's defining role in this generation's ownership story. Backed by 300+ real UK 5 Series enquiries in 2025 [BMW-VERIFIED].
Explore G30 Engines
BMW 5 Series G30 Engine Codes -The Complete Database
Every engine fitted to the G30 saloon specifically -from the 2016 launch through the 2020 LCI facelift and the introduction of mild-hybrid and plug-in hybrid variants.
Overview
BMW 5 Series G30 -Overview
The BMW G30 is the seventh generation of the BMW 5 Series, produced from November 2016 to June 2023.
Built on BMW's CLAR (Cluster Architecture) platform, the G30 introduced significant weight savings through increased use of aluminium and high-strength steel, and offered a range of turbocharged petrol, diesel, and plug-in hybrid powertrains. The engine line-up evolved substantially over its production run: early cars used B48 four-cylinder and B58 six-cylinder petrols, alongside B47 four-cylinder and B57 six-cylinder diesels. The 2020 Life Cycle Impulse (LCI) facelift brought mild-hybrid technology to many models, increased power outputs, and introduced the 545e xDrive plug-in hybrid with the B58 six-cylinder petrol. The G30 was succeeded by the G60 5 Series in 2023.
Key Facts
Platform
BMW CLAR (Cluster Architecture)
Predecessor
BMW 5 Series F10 (2010–2017)
Successor
BMW 5 Series G60 (2023–present)
Sibling body styles in this generation
G31 Touring
Market Intelligence
The G30 5 Series generated 300+ real UK engine enquiries in 2025 [BMW-VERIFIED], concentrated on the 2.0-litre B47 diesel and B48 petrol engines as the parc exits warranty and high-mileage maintenance comes to the fore.
Best & Worst Engines
Best Diesel Overall
B57D30 3.0-litre six-cylinder (530d) -The 261–282 bhp B57 six-cylinder diesel delivers effortless torque, excellent refinement, and genuine durability. It's the engine that defines the G30 as a motorway cruiser -620 Nm of torque and 0-60 in 5.8 seconds with 50+ mpg economy.
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Who it's for: high-mileage buyers who want six-cylinder refinement without petrol running costs.
Best Petrol Overall
B58B30 3.0-litre six-cylinder (540i) -The 335 bhp B58 is widely regarded as BMW's most reliable modern six-cylinder. Delivering 450 Nm of torque and 0-60 in 5.1 seconds, it offers genuine performance with proven durability.
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Who it's for: buyers who want the sweet spot of performance, refinement, and reliability.
Highest Risk
N63B44 4.4-litre V8 (M550i) -The hot-vee V8 design places turbochargers in the engine's 'V', generating significant heat. Valve stem seal wear and cooling system leaks are well-documented on early N63 units. The updated N63B44D (2020+) is improved but still demands meticulous maintenance.
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Who it's for: buyers who accept the premium and keep the car under warranty.
Most Expensive Failure
N63B44 V8 (M550i) -The 4.4-litre V8 is the most expensive engine in the G30 line-up to replace, with reconditioned units costing £6,000–£10,000. Valve stem seal replacement is a labour-intensive job -£3,000–£6,000 at a specialist -and cooling system failures can lead to catastrophic engine damage.
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Who it's for: buyers with deep pockets and a commitment to specialist servicing.
Best Value
B47D20 2.0-litre diesel (520d) -The 188 bhp B47 diesel offers the best balance of performance, economy, and running costs. It's the most common G30 engine, parts are widely available, and the recon cost is the lowest in the range. Post-recall EGR cooler units are reliable, and DPF issues are manageable with regular motorway driving.
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Who it's for: the majority of G30 buyers who prioritise running costs.
Most Overlooked
B48B20 2.0-litre petrol (530i) -Often overshadowed by the six-cylinder 540i, the 248 bhp B48 delivers genuine performance -0-60 in 6.2 seconds -with the economy of a four-cylinder and, crucially, the proven reliability of BMW's modular engine family.
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Who it's for: buyers who want petrol refinement without the six-cylinder's fuel consumption.
BMW 5 Series G30 -Ownership Economics
The G30 rule
A £4,500–£8,000 B57 recon against a £8,000–£12,000 early G30 sits at 38–100% of the car's value. On a sub-£8,000 example, that brushes our 70% BMW threshold -we'll honestly tell you to walk away. Against a well-kept £15,000+ example, the same recon drops to a routine 30–53% -a repair decision, not a financial one. Value the car first.
Key Takeaways
Which G30 Costs Least To Own?
B47 520d -cheapest recon, best economy.
Which G30 Costs Most To Own?
N63 M550i -valve stem seals and cooling system repairs are expensive.
Which G30 Is Best Value?
B47 520d -the sweet spot between economy, performance, and running costs.
Common Problems
G30 Engine Replacement Costs -By Engine and Condition
Core Variants
Diesel & Petrol Lineup
Diesel Variants
Scope note: All variants listed are G30 saloon only. G31 Touring shares most of these engines but is covered on its own Generation Page. The LCI facelift (2020) introduced mild-hybrid technology to many models, increased power outputs, and added the 545e xDrive plug-in hybrid with the B58 six-cylinder. The M550i xDrive received the updated N63B44D V8 in 2020, increasing power from 456 bhp to 523 bhp.
Market Intelligence
Most Requested E90 Engines (2025)
- 1.1. B47D20 2.0 Diesel (300 5 Series-wide enquiries)
- 2.2. B48B20 2.0 Petrol (300)
- 3.3. B57D30 3.0 Diesel (300)
Most Requested E90 Variants
- 1.1. 520d (2.0 diesel)
- 2.2. 530i (2.0 petrol)
- 3.3. 530d (3.0 diesel six)
Average E90 Replacement Cost
£2,800–£10,000 supply-only [BMW-QUOTE]
Most Common E90 Failures
- 1.1. B47 diesel EGR cooler failure
- 2.2. B48/B58 cooling system leaks
- 3.3. N63 V8 valve stem seal wear
BMW 5 Series 520d
G30 (B47)
5
enquiries
BMW 5 Series 540i
G30 (B58)
4
enquiries
BMW 5 Series M550i
G30 (N63)
2
enquiries
FAQ
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