BMW 5 Series G31Touring2017–2023

BMW 5 Series G31 Engines -The Complete UK Guide

Every engine fitted to the G31 Touring -from the 2.0-litre B47 diesel and B48 petrol to the 3.0-litre B57 six-cylinder and the M550i's N63 V8. Real UK replacement costs, honest reliability data, and the EGR cooler and cooling system weaknesses that define this generation. Backed by real UK G31 enquiries in 2025 [BMW-VERIFIED].

Explore G31 Engines
G31Enquiries (2025)BMW-VERIFIED
Touring
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BMW 5 Series G31 Engine Codes -The Complete Database

Every engine fitted to the G31 Touring -from the entry-level four-cylinder diesel and petrol to the V8-powered M550i and the quad-turbo M550d.

Engine CodeFuelPowerYearsReliabilityEnquiriesAvg. Recon Cost
B47D20AB47Diesel163–190 hp (120–140 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£2,500–£4,500 [BMW-QUOTE]
B47D20BB47Diesel150–190 hp (110–140 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£2,500–£4,500 [BMW-QUOTE]
B57D30AB57Diesel265–286 hp (195–210 kW)2017–2023★★★★½ [PROVISIONAL]-(pattern data)£4,500–£7,500 [BMW-QUOTE]
B57D30BB57Diesel320–340 hp (235–250 kW)2017–2023★★★★½ [PROVISIONAL]-(pattern data)£5,000–£8,000 [BMW-QUOTE]
B57SB57Diesel400 hp (294 kW)2017–2020★★★★☆ [PROVISIONAL]-(pattern data)£6,500–£10,000 [BMW-QUOTE]
B48B20AB48Petrol184 hp (135 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£2,000–£3,500 [BMW-QUOTE]
B48B20BB48Petrol252 hp (185 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£2,500–£4,500 [BMW-QUOTE]
B48B20A + EMB48PHEV252–292 hp (185–215 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£3,500–£6,000 [BMW-QUOTE]
B58B30AB58Petrol340 hp (250 kW)2017–2020★★★★½ [PROVISIONAL]-(pattern data)£4,000–£7,000 [BMW-QUOTE]
B58B30CB58Petrol333 hp (245 kW)2020–2023★★★★½ [PROVISIONAL]-(pattern data)£4,000–£7,000 [BMW-QUOTE]
B58B30C + EMB58PHEV394 hp (290 kW)2020–2023★★★★½ [PROVISIONAL]-(pattern data)£5,500–£9,000 [BMW-QUOTE]
N63B44O2N63Petrol V8462 hp (340 kW)2017–2020★★★★☆ [PROVISIONAL]-(pattern data)£6,000–£10,000 [BMW-QUOTE]
N63B44T3N63Petrol V8530 hp (390 kW)2020–2023★★★★☆ [PROVISIONAL]-(pattern data)£6,500–£11,000 [BMW-QUOTE]
S63B44T4S63Petrol V8600–625 hp (441–460 kW)2017–2023★★★★☆ [PROVISIONAL]-(pattern data)£8,000–£15,000 [BMW-QUOTE]
BMW 3 Series E90

Overview

BMW 5 Series G31 -Overview

The BMW G31, launched in February 2017 as the Touring (estate) version of the seventh-generation 5 Series, combines the practicality of a large estate with the dynamic prowess expected of a BMW.

Built on the CLAR (Cluster Architecture) platform shared with the G30 saloon and G11 7 Series, the G31 features a 40:60 front-to-rear weight distribution and a range of turbocharged four-, six- and eight-cylinder engines. A 2020 facelift brought 48V mild-hybrid technology, updated styling and the introduction of the 545e plug-in hybrid.

Key Facts

Platform

BMW CLAR (G30/G31)

Predecessor

BMW 5 Series F11

Successor

BMW 5 Series G61 (2023–present)

Sibling body styles in this generation

G30 (saloon), G32 (6 Series Gran Turismo)

Market Intelligence

The G31 generated real UK engine enquiries in 2025 [BMW-VERIFIED], with the B47 diesel and B48 petrol accounting for the majority of demand as these cars enter their second and third ownership cycles.

Best & Worst Engines

B57D30A (530d) – "The 3.0-litre straight-six diesel is BMW's finest modern diesel – 265 hp of smooth, effortless torque with none of the timing chain anxiety of the earlier <a href='https://bmwengines.uk/engine/n57'>N57</a>. EGR cooler and AdBlue are the only real demands; this engine is widely considered bulletproof." engine

Best Diesel Overall

B57D30A (530d) – "The 3.0-litre straight-six diesel is BMW's finest modern diesel – 265 hp of smooth, effortless torque with none of the timing chain anxiety of the earlier N57. EGR cooler and AdBlue are the only real demands; this engine is widely considered bulletproof."

“”

Who it's for: buyers who want six-cylinder diesel refinement without the quad-turbo complexity.

B58B30C (540i xDrive, post-LCI) – "The B58 straight-six is BMW's finest modern petrol engine – 333 hp of silky-smooth power with proven reliability. The 48V mild-hybrid system smooths stop-start and boosts off-line response. Water pump and cooling system are the only real demands." engine

Best Petrol Overall

B58B30C (540i xDrive, post-LCI) – "The B58 straight-six is BMW's finest modern petrol engine – 333 hp of silky-smooth power with proven reliability. The 48V mild-hybrid system smooths stop-start and boosts off-line response. Water pump and cooling system are the only real demands."

“”

Who it's for: buyers who want effortless six-cylinder power with modern reliability.

N63B44O2 (M550i, pre-LCI) – "The early N63 V8 carries the hot-vee design's heat-related weaknesses – valve stem seals, coolant hoses and battery drain issues are well-documented. The post-LCI N63B44T3 is significantly improved." engine

Highest Risk

N63B44O2 (M550i, pre-LCI) – "The early N63 V8 carries the hot-vee design's heat-related weaknesses – valve stem seals, coolant hoses and battery drain issues are well-documented. The post-LCI N63B44T3 is significantly improved."

“”

Who it's for: only buyers who accept V8 maintenance costs and have checked the car's service history carefully.

S63B44T4 (M5) – "The high-output V8 is a masterpiece of engineering, but any internal failure – turbocharger, timing chain or valvetrain – can run to £15,000+. This is not an engine for the faint-hearted." engine

Most Expensive Failure

S63B44T4 (M5) – "The high-output V8 is a masterpiece of engineering, but any internal failure – turbocharger, timing chain or valvetrain – can run to £15,000+. This is not an engine for the faint-hearted."

“”

Who it's for: buyers with deep pockets and full service history.

B47D20A (520d) – "The 2.0-litre diesel delivers 190 hp with excellent economy and proven B-series reliability. No timing chain anxiety of the earlier <a href='https://bmwengines.uk/engine/n47'>N47</a> – just solid, dependable motoring. It's the G31's volume seller for good reason." engine

Best Value

B47D20A (520d) – "The 2.0-litre diesel delivers 190 hp with excellent economy and proven B-series reliability. No timing chain anxiety of the earlier N47 – just solid, dependable motoring. It's the G31's volume seller for good reason."

“”

Who it's for: buyers who want G31 estate practicality with minimal running costs.

B58B30C + EM (545e xDrive) – "The plug-in hybrid combines the B58 six-cylinder with an electric motor for 394 hp and genuine electric-only running. Most buyers default to diesel or V8, but the 545e is the smart long-term choice for urban users who want performance and efficiency." engine

Most Overlooked

B58B30C + EM (545e xDrive) – "The plug-in hybrid combines the B58 six-cylinder with an electric motor for 394 hp and genuine electric-only running. Most buyers default to diesel or V8, but the 545e is the smart long-term choice for urban users who want performance and efficiency."

“”

Who it's for: buyers who want six-cylinder performance with hybrid efficiency.

BMW 5 Series G31 -Ownership Economics

EngineTypical MileageCommon Major FailureRepair Cost (Specialist)Replacement Cost (Recon)Ownership Verdict
B47D20A/B (518d/520d)60k–120kEGR cooler, DPF, AdBlue£400–£1,000£2,500–£4,500
Solid – proven diesel four, reliable.
B57D30A (530d)60k–120kEGR cooler, AdBlue, turbo£500–£1,200£4,500–£7,500
Best Diesel – smooth six, well-proven.
B57D30B (540d)60k–100kEGR cooler, AdBlue, turbo£500–£1,200£5,000–£8,000
Solid – more power, more complexity.
B57S (M550d)40k–80kQuad-turbo system, EGR£1,000–£2,500£6,500–£10,000
Expensive – quad-turbo complexity; rare.
B48B20A/B (520i/530i)60k–100kWater pump, cooling system£300–£600£2,000–£4,500
Solid – reliable four-cylinder.
B48 PHEV (530e)40k–80kBattery degradation, cooling£500–£1,500£3,500–£6,000
Watch – hybrid complexity; warranty is crucial.
B58B30A/C (540i)60k–100kWater pump, cooling system£400–£800£4,000–£7,000
Best Petrol – BMW's finest modern six.
B58 PHEV (545e)40k–80kBattery, cooling, hybrid system£500–£1,500£5,500–£9,000
Specialist – six-cylinder hybrid; complex but rewarding.
N63B44O2 (M550i pre-LCI)40k–80kValve stem seals, coolant leaks£1,000–£3,000£6,000–£10,000
Watch – hot-vee V8; check history carefully.
N63B44T3 (M550i post-LCI)40k–80kCoolant system, PCV£500–£1,500£6,500–£11,000
Solid – improved V8, still premium running costs.
S63B44T4 (M5)30k–60kTurbo, chain tensioner, cooling£1,500–£4,000£8,000–£15,000
Expensive – high-performance V8; specialist-only.

The G31 rule

A £2,500–£4,500 B47 recon against a £10,000–£20,000 G31 sits at 13–45% of the car's value – a routine repair decision for most examples. Even the most expensive M5 replacement at £15,000 is under 30% of a typical £50,000+ example. The BMW 70% threshold is rarely triggered on the G31 – values are high enough to absorb even significant engine bills. That said, always factor in the car's condition and service history; a neglected example may not be worth the investment.

Key Takeaways

  • Which G31 Costs Least To Own?

    520d (B47) – cheapest entry, lowest insurance, and proven diesel economy.

  • Which G31 Costs Most To Own?

    M5 (S63) – high-output V8 with premium running costs and specialist maintenance.

  • Which G31 Is Best Value?

    530d (B57) – the sweet spot between performance and running costs.

Common Problems

G31 Engine Replacement Costs -By Engine and Condition

Core Variants

Diesel &amp; Petrol Lineup

Diesel Variants

518d520d520d xDrive530d530d xDrive540d xDriveM550d xDrive525d

Petrol Variants

520i530i540i xDriveM550i xDriveM5530e

Scope note: All variants listed are G31 only. The G30 saloon and G32 6 Series Gran Turismo share most of these engines but are covered on their own Generation Pages. The M5 (F90) is technically a separate model but shares the G30/G31 platform; its engine is included for completeness. The M550d xDrive with the B57S quad-turbo diesel was discontinued after 2020.

Market Intelligence

Most Requested E90 Engines (2025)

  1. 1.1. B47D20A/B (520d) – diesel enquiries dominate the volume
  2. 2.2. B57D30A (530d) – six-cylinder diesel
  3. 3.3. B48B20B (530i) – petrol enquiries [PATTERN DATA].

Most Requested E90 Variants

  1. 1.1. 520d
  2. 2.2. 530d
  3. 3.3. 530i [PATTERN DATA].

Average E90 Replacement Cost

£2,000–£15,000 supply only [BMW-QUOTE].

Most Common E90 Failures

  1. 1.1. EGR cooler failure (diesel engines)
  2. 2.2. B48/B58 water pump/cooling system
  3. 3.3. N63 V8 valve stem seals (pre-LCI M550i)
  4. 4.4. 48V mild-hybrid system issues [PATTERN DATA].
Live Feed
VehicleLocationIssueEnquiries
BMW 520d

BMW 520d

G31 (B47D20A)

Birmingham
EGR cooler recall enquiry

6

enquiries

BMW 530d

BMW 530d

G31 (B57D30A)

Leeds
AdBlue system warning

4

enquiries

BMW M550i

BMW M550i

G31 (N63B44T3)

London
Coolant loss

2

enquiries

Updated Monthly

FAQ

BMW 3 Series E90 rear three-quarter view

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