MG Maestro O-series 2.0L EFi Engines
from £1,800 to £3,500
Rebuilt units from £1,800 · Common codes: 20H, O-series, 20H EFi
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MG Maestro Engine Replacement - Rebuilt & Performance Options Available
Get quotes from trusted UK MG Maestro engine specialists. Compare rebuilt and performance reconditioned prices for 20H and O-Series - 2.0L turbo covered. Find UK performance engine specialists.
Supply & Fit Available
12-Month Warranty
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MG Maestro R-series 1.6L Engines
from £1,200 to £2,400
Rebuilt units from £1,200 · Common codes: R-series, S-series, 1598cc
MG Maestro O-series 2.0L Turbo Engines
from £3,500 to £7,500
Rebuilt units from £3,500 · Common codes: 20H Turbo, O-series Turbo, Garrett
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Compare reconditioned, rebuilt & used engine prices
Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best MG Maestro Replacement Engineto Finding the Best MG Maestro Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Most replacements completed within 3-5 days.
Live UK Engine Market Data
Average Market Prices
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↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by MG Maestro Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used MG Maestro engines through EngineMarket.
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
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“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Variants We Cover
MG Maestro Engine ReplacementAll Variants Covered
MG Maestro 2.0 EFi
20H 2.0L Petrol
Rebuilt Engines: £1,800-£3,500
MG Maestro 1.6 L
R-series 1.6L Petrol
Rebuilt Engines: £1,200-£2,400
MG Maestro 2.0i
20H 2.0L Petrol
Rebuilt Engines: £1,800-£3,500
MG Maestro Turbo
20H 2.0L Petrol
Rebuilt Engines: £3,500-£7,500
MG Maestro 1.6 S-series
S-series 1.6L Petrol
Rebuilt Engines: £1,200-£2,400
MG Maestro 1.3 L
A-series 1.3L Petrol
Rebuilt Engines: £1,000-£2,000
MG Maestro 2.0 EFi Digital Dash
20H 2.0L Petrol
Rebuilt Engines: £1,800-£3,500
MG Maestro 2.0 EFi Automatic
20H 2.0L Petrol
Rebuilt Engines: £2,000-£3,800
MG Maestro 1.6 HLS
R-series 1.6L Petrol
Rebuilt Engines: £1,200-£2,400
MG Maestro 2.0 Vanden Plas
20H 2.0L Petrol
Rebuilt Engines: £1,800-£3,500
MG Maestro 1.6 City
R-series 1.6L Petrol
Rebuilt Engines: £1,200-£2,400
MG Maestro 2.0 Mayfair
20H 2.0L Petrol
Rebuilt Engines: £1,800-£3,500
Not sure which variant your MG Maestro is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Maestro
Engine Codes
MG Maestro Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the MG Maestro across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Petrol Engines
Extracted from detailed petrol and performance engine families across MG Maestro variants.
20H - 2.0L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
2.0 EFi2.0i2.0 EFi Digital Dash2.0 EFi Automatic2.0 Vanden Plas2.0 Mayfair
Avg. rebuilt price
£3,500 - £7,500
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 2.0L
- Power output
- 150 hp
- Years fitted
- 1984-1991
Common failures
- ●Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK MG Maestro engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Maestro
Common Problems
MG Maestro Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The MG Maestro's engine reliability varies significantly by type: the early R-series 1.6L is prone to hot starting and carburettor issues, while the later O-series 2.0L EFi is generally robust but can suffer head gasket or timing chain wear. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the...
MG Maestro R-series Hot Starting Failure - Why Early 1.6L Engines Won't Restart When Warm
MG Maestro R-series Hot Starting Failure
Most affected vehicles
MG Maestro 1.6 L1.6 HLS
MG Maestro 1.6 L, 1.6 HLS, 1.6 City (1983-1984, R-series engine code)
Failure mileage range
40,000-80,000 miles
Typical failure window
Root cause
Fuel vapour lock in the twin Weber carburettors and inlet manifold when the engine is hot, preventing proper fuel delivery for restart.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Carburettor Adjustment & Heat Shield | £400 - £700 | £250 - £450 | Re-jet Weber carbs, fit heat shield to inlet manifold, adjust choke linkage | May reduce symptoms but rarely eliminates hot starting; suitable for low-mileage preservation |
| Intermediate - Carburettor Rebuild & Fuel System Upgrade | £800 - £1,400 | £500 - £900 | Full Weber rebuild, upgraded fuel lines, electric fuel pump conversion | More reliable solution; extends usability but doesn't address fundamental R-series design flaws |
| Full Replacement - Reconditioned R-series or O-series Swap | £2,000 - £3,500 | £1,200 - £2,400 | Supply & fit of rebuilt R-series engine, or O-series 2.0L conversion with necessary modifications | Definitive solution; O-series swap eliminates hot starting entirely and improves performance |
Our recommendation
For early MG Maestro owners experiencing persistent hot starting, a full engine replacement often offers better long-term value than repeated carburettor work. If the car is a numbers-matching restoration, a rebuilt R-series may be preferred; otherwise, an O-series 2.0L swap provides modern reliability and is a popular upgrade among enthusiasts.
Compare rebuilt R-series and O-series engine prices for your MG MaestroReplacement Engine Options
MG Maestro Engine TypesOptions, Costs & What to Expect
Every MG Maestro engine type is available through our UK network, with typical price ranges based on variant, engine code and budget.
MG Maestro Reconditioned Engines (Recon)£1,800 - £3,500((supply only))
MG Maestro Rebuilt Engines£1,800 - £7,500((supply only))
MG Maestro Used Engines£800 - £2,200((supply only))
MG Maestro Remanufactured Engines£2,200 - £4,500((supply only))
MG Maestro Refurbished Engines£1,400 - £2,800((supply only))
Compare MG Maestro engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific MG Maestro within hours.
Engine Sizes
MG Maestro Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the MG Maestro is listed below, with compatible engine codes, production years and common failure notes to help you identify the right replacement.
The smallest engine offered in the MG Maestro, the 1.3L A-series unit powered base models in the launch years. Simple, economical and easy to work on, but underpowered for the Maestro's size and weight.
⚙
Engine Code(s)
A-series Plus
▣
Compatible Models (UK)
1.3 L
ϟ
Power output
Verified by registration
△
Common Failure Points
Oil pump wear, cylinder head gasket failure, distributor wear on high-mileage units
Production Years: 1983-1984
Compare MG Maestro 1.3L petrol engine pricesFuel Type
MG Maestro Engines by Fuel Type
Choose your MG Maestro engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early 1.3L base units to the rare 2.0L Turbo.
MG Maestro Petrol Engines
PetrolAll MG Maestro engines were petrol-powered, ranging from economical 1.3L A-series units to the desirable 2.0L O-series EFi and rare Turbo variants.
Common MG Maestro Petrol Engine Families
- •A-series - 1.3L base engine (1983-1984), simple but underpowered
- •R-series/S-series - 1.6L carburettor engines (1983-1985), known for hot starting issues
- •O-series 20H - 2.0L fuel-injected engine (1985-1991), reliable and desirable
Found In
- •MG Maestro Mk1 (1983-1985) - A-series 1.3L, R-series 1.6L, early S-series 1.6L
- •MG Maestro Mk2 (1985-1991) - O-series 2.0L EFi, 2.0i, Turbo
Known For
- •R-series hot starting and carburettor tuning difficulties
- •O-series EFi reliability when maintained, but head gasket wear on high mileage
- •Turbo variant's collectability and specialist rebuild requirements
Typical Petrol Models
- •1.3 L
- •1.6 L / HLS / City
- •2.0 EFi / 2.0i / Digital Dash / Automatic
MG Maestro Petrol Engines
PetrolAll MG Maestro engines were petrol-powered, ranging from economical 1.3L A-series units to the desirable 2.0L O-series EFi and rare Turbo variants.
Common MG Maestro Petrol Engine Families
- •A-series - 1.3L base engine (1983-1984), simple but underpowered
- •R-series/S-series - 1.6L carburettor engines (1983-1985), known for hot starting issues
- •O-series 20H - 2.0L fuel-injected engine (1985-1991), reliable and desirable
Found In
- •MG Maestro Mk1 (1983-1985) - A-series 1.3L, R-series 1.6L, early S-series 1.6L
- •MG Maestro Mk2 (1985-1991) - O-series 2.0L EFi, 2.0i, Turbo
Known For
- •R-series hot starting and carburettor tuning difficulties
- •O-series EFi reliability when maintained, but head gasket wear on high mileage
- •Turbo variant's collectability and specialist rebuild requirements
Typical Petrol Models
- •1.3 L
- •1.6 L / HLS / City
- •2.0 EFi / 2.0i / Digital Dash / Automatic
Not sure which fuel type your MG Maestro has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK MG Maestro specialists.
Engine YearsGet quotes for 1983 MG Maestro replacement engines →
MG Maestro Engines by YearWhat Was Fitted & WhenMG Maestro Engines by Year - What Was Fitted & When
This section covers all major engine changes across the MG Maestro's 1983-1991 production timeline, organised so classic car owners can quickly identify their engine and compare rebuilt prices from UK specialists.
⚙Key Changes
- ✓MG Maestro introduced to replace Morris Ital
- ✓R-series 1.6L twin-Weber carburettor engine standard on most models
- ✓A-series 1.3L base engine for entry-level variants
- ✓Early build quality and reliability issues reported
▣Main Engines
A-seriesPlus - 1.3L petrol (1.3 L)
R-series- 1.6L petrol (1.6 L, 1.6 HLS, 1.6 City)
▰Popular Models
- •MG Maestro 1.3 L
- •MG Maestro 1.6 L
- •MG Maestro 1.6 HLS
🔧Known For
- ✓R-series hot starting failure when engine is warm
- ✓Twin Weber carburettor tuning difficulties and poor cold starting
- ✓Early build quality concerns affecting long-term reliability
- ✓High replacement demand for R-series units today
Engine Codes Covered:
A-series PlusR-seriesNot sure which year your MG Maestro was built- Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK MG Maestro specialists.
FAQ