Mercedes Benz AMG GLA 45 Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Mercedes Benz AMG GLA 45 engine specialists. Compare prices on reconditioned, rebuilt and used M133 and M139 hand-built 2.0-litre turbocharged engines - supply & fit available nationwide for both X156 and H247 generations.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £3,800 to £12,000
Used from £2,800 · Reconditioned from £4,500 · Common codes: M133.980, M139.980
From £2,800
Tested, bare/short engine
From £4,500
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 AMG GLA 45 Replacement Engineto Finding the Best Mercedes Benz AMG GLA 45 Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMercedes Benz AMG GLA 45 - Engine History & Specs at a Glance
The Mercedes-AMG GLA 45 represents the pinnacle of compact SUV performance, powered by two generations of hand-built AMG four-cylinder engines - the M133 in the first-generation X156 (2014-2020) and the M139 in the second-generation H247 (2020-present). Both engines were, at their respective launches, the most powerful four-cylinder production engines in the world.
Variant HistoryMercedes Benz AMG GLA 45 - Engine History & Specs at a Glance
The Mercedes-AMG GLA 45 represents the pinnacle of compact SUV performance, powered by two generations of hand-built AMG four-cylinder engines - the M133 in the first-generation X156 (2014-2020) and the M139 in the second-generation H247 (2020-present). Both engines were, at their respective launches, the most powerful four-cylinder production engines in the world.
Mercedes Benz AMG GLA 45
Fuel TypePetrol
Engine Size2.0L (1,991cc) - both M133 and M139
Power Output Range355-421hp across the variant's historyEngine History Timeline
AMG GLA 45 launched with X156 generation M133.980 2.0L turbo, 355hp (360 PS), 450Nm torque, 7-speed AMG SPEEDSHIFT DCT, 4MATIC AWD, 0-100km/h in 4.8 seconds
M133 upgraded to 381hp (280kW) and 475Nm torque via reconfigured valve assembly timing and turbocharging
2019 - Service campaign initiated for turbocharger oil feed line contamination
All-new H247 GLA 45 launched with M139.980 2.0L turbo 382hp (standard) and 421hp (S variant) - world's most powerful four-cylinder production engine
M139 introduced with 180-degree rotated layout twin fuel injection, 9-speed AMG SPEEDSHIFT DCT, 4MATIC+ with drift mode
Key Specs Snapshot
Fuel TypePetrolEngine Size2.0L (1,991cc) - both M133 and M139Power Output Range355-421hp across the variant's historyTorque Range450-500NmYears Produced2014-presentEvery hand-built AMG engine fitted to the Mercedes Benz GLA 45 is covered below, with UK rebuilt pricing and known failure points from real owner experience.
Mercedes Benz AMG GLA 45 Engine Codes - Specifications & Replacement CostMercedes Benz AMG GLA 45 Engine Codes - Specifications & Replacement Cost
2.0L Turbo Petrol (2014-2020)
Power Output355-381 hp (265-280 kW) @ 6,000 rpmTorque450-475 Nm @ 2,250-5,000 rpmDisplacement1,991ccConfigurationInline-4, twin-scroll turbocharger (1.8 bar / 26.1 psi boost), direct injection via piezo injectors, forged pistons, NANOSLIDE cylinder coating, hand-built at AMGYears Fitted2014-2020
Compatible Trim Levels
- AMG GLA 45
- AMG GLA 45 4MATIC
- AMG GLA 45 Yellow Night Edition (X156)
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,800-£4,800
Reconditioned
Addressed known issues, tested
£4,500-£6,800
Rebuilt
Full teardown, upgraded internals
£3,800-£9,000
Common Failure
The M133's twin-scroll turbocharger is susceptible to failure due to oil feed line contamination. Timing chain stretch causing cold-start rattle, oil leaks from valve cover gaskets, and carbon buildup on intake valves are also documented.
The Mercedes-AMG GLA 45 is powered by two generations of hand-built AMG four-cylinder engines - the M133 and M139 - both remarkable engineering achievements that have developed well-documented reputations for specific, predictable failures. Turbocharger failure due to oil feed line contamination dominates M133 replacement demand, while M139 owners report cooling system strain and oil consumption concerns. Every rebuilt engine supplied through EnginesMarket includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Below we break down the most common AMG GLA 45 engine failures, what they cost to fix, and when replacement is the smarter financial decision.
Why the AMG GLA 45 Loses Boost and Generates Smoke
Affected Vehicles
Mercedes Benz AMG GLA 45 (M133.980, 2014-2020)
Typical Failure Mileage
40,000 - 80,000 miles
Root Cause
The M133 engine runs up to 1.8 bar (26.1 psi) of boost, creating extreme heat in the turbocharger housing. Insufficient cool-down periods after hard driving can coke the oil feed lines, restricting oil flow to the turbo bearings. A Mercedes Service Campaign was initiated for GLA 45 turbocharger failure due to contamination of the oil feed line. The result is progressive bearing wear, shaft play, and eventual turbo failure with metallic debris entering the intercooler.
Why It Happens
The M133 engine runs up to 1.8 bar (26.1 psi) of boost, creating extreme heat in the turbocharger housing. Insufficient cool-down periods after hard driving can coke the oil feed lines, restricting oil flow to the turbo bearings. A Mercedes Service Campaign was initiated for GLA 45 turbocharger failure due to contamination of the oil feed line. The result is progressive bearing wear, shaft play, and eventual turbo failure with metallic debris entering the intercooler.
Dealer (parts + labour)
£2,500-£3,500
Specialist (parts + labour)
£1,500-£2,200
What it involves
Replace turbo cartridge, clean oil feed lines, replace oil and filter
Suitability
40k-70k miles. Viable if caught early with no internal engine debris
1 - 2 daysDealer (parts + labour)
£3,500-£5,000
Specialist (parts + labour)
£2,200-£3,200
What it involves
Turbo replacement plus intercooler removal and chemical flush to remove metal debris
Suitability
40k-70k miles. Required if turbo bearings have failed and shed debris
1 - 2 daysDealer (parts + labour)
£9,000-£14,000
Specialist (parts + labour)
£4,500-£9,000
What it involves
Supply & fit rebuilt M133 with new turbocharger, upgraded oil feed lines, timing chain
Suitability
Full long-block warranty. Necessary when turbo debris has scored cylinder walls
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 - Turbocharger Cartridge Replacement Minor | £2,500-£3,500 | £1,500-£2,200 | Replace turbo cartridge, clean oil feed lines, replace oil and filter | 40k-70k miles. Viable if caught early with no internal engine debris | 1 - 2 days |
 Major - Full Turbo Unit & Intercooler Flush Best Value | £3,500-£5,000 | £2,200-£3,200 | Turbo replacement plus intercooler removal and chemical flush to remove metal debris | 40k-70k miles. Required if turbo bearings have failed and shed debris | 1 - 2 days |
Full Replacement - Rebuilt Engine Best Value | £9,000-£14,000 | £4,500-£9,000 | Supply & fit rebuilt M133 with new turbocharger, upgraded oil feed lines, timing chain | Full long-block warranty. Necessary when turbo debris has scored cylinder walls | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical AMG GLA 45 (X156) is worth £15,000-£30,000 depending on age, mileage and condition - the full replacement cost of £4,500-£9,000 is modest relative to vehicle value. For vehicles worth under £15,000, evaluate repair options first.
Our Recommendation
Our Recommendation
On an AMG GLA 45, do not cut corners on turbo maintenance. If you hear whistling or notice oil consumption above 1 litre per 1,000 miles, have the turbo inspected immediately. A specialist turbo replacement is painful but far less painful than a full engine rebuild. Also, fit a turbo timer or religiously idle the engine for 60 seconds after hard driving - it doubles turbo bearing life on the M133.
Don't Let Engine Failure Write Off Your Mercedes Benz AMG GLA 45
A failed hand-built AMG engine doesn't have to mean the end of your GLA 45. Whether you're dealing with an M133 turbocharger failure, timing chain stretch, oil leaks, or M139 cooling system strain, EnginesMarket makes it simple to compare prices from trusted UK Mercedes Benz AMG GLA 45 specialists. Every rebuilt engine in our network includes upgraded components designed to address the original failure point, a minimum 12-month unlimited mileage warranty, and nationwide delivery with supply & fit options available.
Compare rebuilt M133 Mercedes Benz AMG GLA 45 engine prices
12-Month Minimum
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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 Benz AMG GLA 45. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mercedes Benz AMG GLA 45 Engine ReplacementFrequently Asked Questions
Question 1How much does it cost to replace an AMG GLA 45 engine in the UK-
An AMG GLA 45 engine replacement typically costs between £3,800 and £12,000 depending on generation, condition type, and whether fitting is included. M133 units (X156, 2014-2020) range from £3,800 to £9,000, while M139 units (H247, 2020-present) range from £5,500 to £12,000.
- Rebuilt M133 (AMG GLA 45 X156): £3,800-£9,000 supply only
- Rebuilt M139 (AMG GLA 45 / 45 S H247): £5,500-£12,000 supply only
- Used engines from breakers: £2,800-£7,000 but higher risk
- Labour for supply & fit adds £1,000-£2,000 to any engine price
Question 2Is the M133 engine in the AMG GLA 45 reliable-
The M133 is generally durable but can develop issues as mileage rises. It has several well-documented problems that owners should be aware of.
- Turbocharger failure due to oil feed line contamination
- Timing chain stretch causing cold-start rattle
- Oil leaks from valve cover gasket and oil filter housing
- Carbon buildup on intake valves
- Regular oil changes every 5,000-7,000 miles are critical for longevity
Question 3What are the signs of M133 turbocharger failure in an AMG GLA 45-
The M133's turbocharger typically shows warning signs before complete failure.
- Loss of power or reduced boost pressure
- Whistling noise from the engine bay
- Oil in the intake system
- Excessive smoke from the exhaust
- Check engine light illuminated with turbo-related fault codes
Question 4What's the difference between the GLA 45 and GLA 45 S-
The GLA 45 S is the higher-output variant of the second-generation H247 GLA 45, introduced in 2020 with the M139 engine.
- GLA 45 (standard): 382hp, 480Nm torque
- GLA 45 S: 421hp, 500Nm torque
- Both use the M139 2.0L turbo engine with different tuning
- The S variant features a more aggressive exhaust and additional performance features
Question 5Should I repair or replace my AMG GLA 45 engine-
Repair if the failure is isolated (e.g., turbocharger cartridge, timing chain tensioner, valve cover gasket). Replace if there's bottom end damage, bore scoring, or catastrophic turbo failure.
- Turbocharger replacement at specialist: £1,500-£3,200 - do this at first sign of trouble
- Timing chain tensioner replacement: £350-£600 - do this at first sign of rattle
- Walnut blasting: £300-£500 - preventative every 50,000 miles
- Full M133 rebuild: £4,500-£9,000 - for catastrophic failure or 100k+ miles
- Full M139 rebuild: £5,500-£12,000 - for catastrophic failure or 80k+ miles
- Given AMG GLA 45 values (£15,000-£60,000+), a rebuilt engine is typically excellent value
Question 6How do I know which engine code my AMG GLA 45 has-
Check your vehicle log book (V5C) for the engine number, which includes the engine code prefix.
- V5C log book shows full engine number with code prefix
- Engine code stamped on cylinder block
- AMG GLA 45 (X156, 2014-2020): M133.980 (2.0L turbo, 355-381hp)
- AMG GLA 45 (H247, 2020-present): M139.980 (2.0L turbo, 382hp)
- AMG GLA 45 S (H247, 2020-present): M139.980 (2.0L turbo, 421hp)
- Service history documents list engine type
Question 7Can I fit a used AMG GLA 45 engine myself-
We strongly advise against DIY fitting on an AMG GLA 45. The transverse-mounted engine layout, AMG-specific DCT gearbox alignment, and ECU coding requirements demand specialist equipment and expertise.
- Transverse engine mounting requires specialist alignment
- 7-speed (M133) or 9-speed (M139) DCT alignment needs precise setup
- AMG-specific ECU coding and adaptations required
- Turbocharger and cooling system plumbing requires specialist knowledge
- Specialist supply & fit costs £1,000-£2,000 - essential for an AMG
Question 8What warranty comes with a reconditioned AMG GLA 45 engine-
Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty, with many specialists offering 24-month coverage on M133 and M139 rebuilds. This includes parts and labour for any manufacturing defect or installation error.
- 12-month unlimited mileage is the minimum standard
- M133 and M139 rebuilds often include 24-month warranty
- All warranties cover parts, labour, and MOT compliance
- Extended warranties available at point of purchase
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