Mercedes Benz GLE Class GLE53 Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Mercedes Benz GLE Class GLE53 AMG engine specialists. Compare prices on reconditioned, rebuilt and used engines for the 3.0-litre turbocharged inline-six with EQ Boost - supply & fit available nationwide.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £5,500 to £9,000
Used from £3,000 · Reconditioned from £5,000 · Common codes: M256.930
From £3,000
Tested, bare/short engine
From £5,000
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mercedes Benz GLE Class GLE53 Replacement Engineto Finding the Best Mercedes Benz GLE Class GLE53 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes Benz GLE Class GLE53 - Engine History & Specs at a Glance
The GLE53 AMG launched in 2019 as the performance entry point to the W167 GLE range, powered by the M256 3.0-litre inline-six turbocharged engine with 48V EQ Boost mild-hybrid technology - 435hp and 520Nm of torque. In 2024, Mercedes-AMG introduced the GLE53 HYBRID, featuring a further-developed M256M EVO engine producing 443hp combined with a 181hp electric motor for a total system output of 577hp.
Variant HistoryMercedes Benz GLE Class GLE53 - Engine History & Specs at a Glance
The GLE53 AMG launched in 2019 as the performance entry point to the W167 GLE range, powered by the M256 3.0-litre inline-six turbocharged engine with 48V EQ Boost mild-hybrid technology - 435hp and 520Nm of torque. In 2024, Mercedes-AMG introduced the GLE53 HYBRID, featuring a further-developed M256M EVO engine producing 443hp combined with a 181hp electric motor for a total system output of 577hp.
Mercedes Benz GLE Class GLE53
Fuel TypePetrol (M256: 48V mild hybrid; M256M EVO: plug-in hybrid)
Engine Size3.0L (2,999cc)
Power Output Range435-577hp across the variant's historyEngine History Timeline
M256.930 3.0L inline-six turbo with 48V EQ Boost, 435hp (GLE53 4MATIC+, W167)
M256M EVO 3.0L inline-six turbo with plug-in hybrid, 443hp engine + 181hp electric motor, 577hp combined (GLE53 HYBRID)
Key Specs Snapshot
Fuel TypePetrol (M256: 48V mild hybrid; M256M EVO: plug-in hybrid)Engine Size3.0L (2,999cc)Power Output Range435-577hp across the variant's historyYears Produced2019-presentEvery engine fitted to the Mercedes Benz GLE Class GLE53 is covered below, with UK rebuilt pricing and known failure points - from 48V battery and ISG failures to timing chain noise and wiring harness degradation.
Mercedes Benz GLE Class GLE53 Engine Codes - Specifications & Replacement CostMercedes Benz GLE Class GLE53 Engine Codes - Specifications & Replacement Cost
3.0L Inline-Six Turbo with 48V EQ Boost (2019-present)
Power Output429-435 hp (320 kW) @ 5,800-6,100 rpm, plus 21 hp from EQ BoostTorque520 Nm (384 lb-ft) @ 1,800-5,800 rpmYears Fitted2019-presentDisplacement2,999ccCylindersInline 6, DOHC, 24-valve, turbocharged with electric auxiliary compressorEngine CodeM256.930
Compatible Trim Levels
- GLE53 4MATIC+
- GLE53 4MATIC+ AMG Line
- GLE53 4MATIC+ Premium Plus
- GLE53 4MATIC+ Coupe
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£3,000-£4,500
Reconditioned
Addressed known issues, tested
£5,000-£6,500
Rebuilt
Full teardown, upgraded internals
£5,500-£9,000
Common Failure
48V battery and integrated starter-generator (ISG) failure - the M256's 48V system is the most common source of problems on the GLE53. The 48V battery can fail without warning, causing a complete no-start condition. Coolant pump issues and timing chain noise on cold start have also been reported. Typical failure mileage: 30,000-70,000 miles.
The GLE53's M256 inline-six is a sophisticated and powerful engine, but its advanced 48V mild-hybrid system introduces complexity that can lead to expensive repairs. The most common issues are 48V battery and ISG failures that can immobilise the vehicle, timing chain noise on cold start, and wiring harness degradation. Every rebuilt engine supplied through EnginesMarket includes upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.
The Performance Inline-Six's Silent Killer
Affected Vehicles
Mercedes GLE53 AMG 4MATIC+ (M256.930, 2019-present)
Typical Failure Mileage
30,000-70,000 miles
Root Cause
The 48V lithium-ion battery (G1/3) is located in the right-side rear engine compartment and is critical to the EQ Boost system. If the 48V battery fails, the vehicle cannot be started - a conventional jump start will not work. The integrated starter-generator (ISG) can also fail, causing charging system malfunctions. Coolant pump issues related to the 48V system have also been reported, causing erratic cooling and warning lights.
Why It Happens
The 48V lithium-ion battery (G1/3) is located in the right-side rear engine compartment and is critical to the EQ Boost system. If the 48V battery fails, the vehicle cannot be started - a conventional jump start will not work. The integrated starter-generator (ISG) can also fail, causing charging system malfunctions. Coolant pump issues related to the 48V system have also been reported, causing erratic cooling and warning lights.
Dealer (parts + labour)
£150-£300
Specialist (parts + labour)
£100-£200
What it involves
Diagnostic scan of 48V battery, ISG, and hybrid control module
Suitability
First step - confirms which component has failed
1 - 2 daysDealer (parts + labour)
£2,200-£3,500
Specialist (parts + labour)
£1,800-£2,500
What it involves
Replace 48V lithium-ion battery pack, recode to vehicle ECU
Suitability
If battery has failed causing no-start
1 - 2 daysDealer (parts + labour)
£2,500-£4,000
Specialist (parts + labour)
£1,800-£2,800
What it involves
Replace integrated starter-generator unit, reprogramme control modules
Suitability
If charging system failures or ISG fault codes present
1 - 2 daysDealer (parts + labour)
£8,500-£12,000
Specialist (parts + labour)
£5,500-£9,000
What it involves
Supply & fit rebuilt M256 with new 48V components, 12-month warranty
Suitability
If electrical failure has caused engine damage
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor - 48V system diagnostics Minor | £150-£300 | £100-£200 | Diagnostic scan of 48V battery, ISG, and hybrid control module | First step - confirms which component has failed | 1 - 2 days |
 Intermediate - 48V battery replacement Best Value | £2,200-£3,500 | £1,800-£2,500 | Replace 48V lithium-ion battery pack, recode to vehicle ECU | If battery has failed causing no-start | 1 - 2 days |
Major - ISG replacement Best Value | £2,500-£4,000 | £1,800-£2,800 | Replace integrated starter-generator unit, reprogramme control modules | If charging system failures or ISG fault codes present | 1 - 2 days |
Full Replacement - Rebuilt M256 engine Best Value | £8,500-£12,000 | £5,500-£9,000 | Supply & fit rebuilt M256 with new 48V components, 12-month warranty | If electrical failure has caused engine damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 2019-present GLE53 AMG 4MATIC+ is worth approximately £35,000-£55,000 depending on mileage and condition. The GLE53 sits firmly in the £15,000+ band - replacement cost is small relative to vehicle value.
Our Recommendation
Our Recommendation
If your GLE53 displays a "48V battery malfunction" warning or fails to start, do not assume a conventional jump start will work - the 48V system is entirely separate from the 12V starter battery. First, check your VIN for any outstanding 48V-related recalls. If the 48V battery has failed, specialist pricing of £1,800-£2,500 is significantly lower than dealer rates, and independent Mercedes specialists with proper diagnostic equipment can perform the necessary coding.
Don't Let 48V System Failure, Timing Chain Noise, or Wiring Harness Issues Write Off Your Mercedes GLE53 AMG
Whether you're facing M256 48V battery failure, timing chain rattle, or wiring harness degradation on your GLE53, EnginesMarket makes it simple to compare quotes from trusted UK Mercedes AMG specialists. Every rebuilt engine in our network carries upgraded components addressing the original design weakness - plus a minimum 12-month unlimited mileage warranty with nationwide delivery and supply & fit options. Don't pay main dealer premiums. Compare prices from independent Mercedes AMG specialists who know this performance inline-six inside out.
Compare rebuilt M256 Mercedes GLE53 engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Mercedes GLE Class GLE53. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes Benz GLE Class GLE53 Engine ReplacementFrequently Asked Questions
Question 1How much does a Mercedes GLE53 AMG engine replacement cost in the UK-
Short summary: A rebuilt M256 engine for the GLE53 costs £5,500-£9,000 supply-only. Fitting adds £1,000-£2,000 depending on complexity - the 48V mild-hybrid system requires specialist knowledge.
- GLE53 (M256.930): rebuilt unit £5,500-£9,000; used engine from £3,000
- M256 48V battery replacement: £1,800-£2,500 at specialist
- M256 timing chain replacement: £2,000-£3,500 at specialist
- Price depends on engine code, year, mileage, and supplier warranty length
Question 2What are the signs of 48V battery failure on a Mercedes GLE53-
Short summary: A "48V battery malfunction" warning and complete no-start condition are the classic signs. The vehicle cannot be jump-started conventionally - the 48V system is separate from the 12V starter battery.
- Warning lights: "48V battery malfunction" or check engine light
- Complete no-start - the vehicle is "bricked" until the battery is replaced
- Intermittent starting issues - vehicle may start after electronics reach sleep status
- Coolant pump and ISG-related warning lights may also appear
Question 3Is the Mercedes GLE53 AMG engine (M256) reliable-
Short summary: The M256 inline-six is a sophisticated and powerful engine, but it has known 48V system issues that can immobilise the vehicle, as well as timing chain noise and wiring harness degradation. With regular maintenance and proactive attention to these issues, the engine is proving durable.
- 48V battery and ISG failures can cause no-start - requires specialist replacement
- Timing chain rattle on cold start has been reported - act immediately
- Wiring harness degradation near exhaust manifold can cause misfires
- Well-maintained M256 engines exceed 100,000 miles
Question 4How long does a Mercedes GLE53 AMG engine last-
Short summary: The M256 is too new for definitive long-term data, but with regular maintenance and proactive attention to the 48V system and timing components, 100,000-150,000 miles is achievable.
- M256 (GLE53): too early for definitive data - 48V and timing issues from 30k-70k miles
- Service interval is 10,000 miles or 12 months - use Mercedes-spec oil (MB 229.5)
- Late oil changes accelerate timing chain wear
- Regular inspection of wiring harness recommended
Question 5Is it worth replacing the engine in my Mercedes GLE53 AMG-
Short summary: Yes, if the GLE53 is otherwise in good condition with no rust or major electrical faults. A rebuilt M256 costs £5,500-£9,000 - far less than replacing a £35,000-£55,000 vehicle.
- GLE53 values: £35,000-£55,000 depending on year, mileage and condition
- Rebuilt engine with upgraded components fixes original weak points
- Supply & fit typically £6,500-£11,000 depending on engine code
- New engine includes 12-month unlimited mileage warranty
Question 6What oil does my Mercedes GLE53 AMG need-
Short summary: Mercedes-Benz specifies MB 229.5 high-performance oil - typically 5W-30 or 5W-40 fully synthetic. The M256 requires approximately 7.5 litres.
- M256 (GLE53): MB 229.5 5W-30 or 5W-40 - high-spec synthetic only
- Never use non-approved oil - destroys timing chain tensioners and hydraulic lifters
- Change every 10,000 miles or 12 months - stretched intervals cause timing chain wear
- The 48V system requires specialist maintenance
Why Choose UsCompare Mercedes GLE Class GLE53Engine PricesToday
200+ AMG engines supplied through our network
12-Month Warranty on every rebuilt GLE53 engine
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supply & fit available for M256
Comparing quotes for your Mercedes GLE53 AMG is completely free, with no obligation and no pressure. Enter your registration above to get tailored quotes from UK Mercedes AMG specialists who understand the M256 inline-six and 48V EQ Boost system inside out. Whether you need a used engine, a reconditioned unit, or a full rebuilt engine with upgraded 48V components and timing parts, we'll connect you with the right specialist for your exact GLE53 - with a minimum 12-month warranty on every engine supplied.
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