MG 3 1.5L Petrol Engines
from £1,400 to £1,750
Rebuilt units from £1,400 · Common codes: 15S4C, 15S4E, 15S4F, 15S4G
MG ENGINE MARKETPLACE
MG 3 Engine Replacement - Compare Prices & Save
Get quotes from trusted UK MG 3 engine specialists. Compare used and reconditioned prices for 1.5L petrol - 15S4C covered. Find the best value for your budget.
Supply & Fit Available
12-Month Warranty
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100+ Suppliers
MG 3 1.3L Petrol Engines
from £1,350 to £1,650
Rebuilt units from £1,350 · Common codes: 13S4C, 13S4C-AP
MG 3 Hybrid+ Engines
from £2,200 to £3,100
Rebuilt units from £2,200 · Common codes: L3A, 15S4G
Instant engine replacement quote - 100% free, no obligation
Engine replacement near me - UK-wide specialist network
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 3 Replacement Engineto Finding the Best MG 3 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 3 Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used MG 3 engines through EngineMarket.
4.8
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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 3 Engine ReplacementAll Variants Covered
MG 3 3Style
15S4C 1.5L Petrol
Rebuilt Engines: £1,400-£1,550
MG 3 Excite
15S4E 1.5L Petrol
Rebuilt Engines: £1,600-£1,750
MG 3 Exclusive
15S4E 1.5L Petrol
Rebuilt Engines: £1,600-£1,750
MG 3 3Form
15S4C 1.5L Petrol
Rebuilt Engines: £1,400-£1,550
MG 3 3Style+
15S4E 1.5L Petrol
Rebuilt Engines: £1,600-£1,750
MG 3 3Form Sport
15S4C 1.5L Petrol
Rebuilt Engines: £1,400-£1,550
MG 3 3Style Lux
15S4E 1.5L Petrol
Rebuilt Engines: £1,600-£1,750
MG 3 Explore
15S4C 1.5L Petrol
Rebuilt Engines: £1,400-£1,550
MG 3 90th Anniversary Edition
15S4E 1.5L Petrol
Rebuilt Engines: £1,600-£1,750
MG 3 3Time
13S4C 1.3L Petrol
Rebuilt Engines: £1,350-£1,500
MG 3 Hybrid+ SE
L3A 1.5L Hybrid
Rebuilt Engines: £2,200-£3,100
MG 3 Hybrid+ Trophy
L3A 1.5L Hybrid
Rebuilt Engines: £2,200-£3,100
Not sure which variant your MG 3 is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
3
Engine Codes
MG 3 Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the MG 3 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 3 variants.
15S4C - 1.5L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
3Time3Form3Form Sport3StyleExciteExclusive
Avg. rebuilt price
£1,400 - £1,550
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 1.5L
- Power output
- 105-109 hp
- Years fitted
- 2011-2023
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 3 engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
3
Common Problems
MG 3 Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The MG 3's 1.5L VTi-Tech petrol engines dominate UK replacement enquiries, with timing chain wear on pre-2018 units and injector carbon buildup on facelift models driving most demand. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month unlimited...
MG 3 Timing Chain Failure - Why Early 15S4C Engines Fail Prematurely
MG 3 Timing Chain Failure
Most affected vehicles
MG 3 3Time3Form
MG 3 3Time, 3Form, 3Style, Excite (2013-2018, 15S4C & 13S4C)
Failure mileage range
55,000-85,000 miles
Typical failure window
Root cause
Undersized oil pump drive gear accelerates tensioner wear; high idle RPM calibration in MG 3 increases chain load compared to sister platforms.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Chain Kit | £950 - £1,400 | £650 - £950 | Replace timing chain, tensioner, guides before catastrophic failure | Viable only if caught early; does not address underlying gear design flaw |
| Full Replacement - Rebuilt Engine | £2,800 - £3,600 | £1,400 - £1,750 | Supply & fit rebuilt 15S4C with upgraded OEM-spec tensioner (051103210B) and revised oil pump gear | Addresses root cause; 12-month warranty; best value for engines over 70k miles |
Our recommendation
If your MG 3 shows early chain rattle below 60k miles, a preventative kit may extend life. Above 70k miles or with confirmed stretch, replacement with a rebuilt unit including the upgraded tensioner offers better long-term value and warranty protection.
Compare rebuilt 15S4C engine prices for your MG 3Replacement Engine Options
MG 3 Engine TypesOptions, Costs & What to Expect
Every MG 3 engine type is available through our UK network, with typical price ranges based on variant, engine code and budget.
MG 3 Reconditioned Engines (Recon)£1,400 - £1,750((supply only))
MG 3 Rebuilt Engines£1,600 - £2,100((supply only))
MG 3 Used Engines£950 - £1,400((supply only))
MG 3 Remanufactured Engines£1,850 - £2,400((supply only))
MG 3 Refurbished Engines£1,700 - £2,200((supply only))
Compare MG 3 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 3 within hours.
Engine Sizes
MG 3 Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the MG 3 in the UK is listed below, with compatible engine codes, production years and common failure notes to help you identify the correct replacement.
The 1.3L VTi-Tech was the entry-level engine for early MG 3 models, offering lower running costs and simpler maintenance. Primarily fitted to base 3Time variants before 2018, it shares the timing chain architecture of the larger 1.5L but with reduced power output.
⚙
Engine Code(s)
13S4C, 13S4C-AP
▣
Compatible Models (UK)
3Time (AP32, 2013-2017), select fleet-spec examples
ϟ
Power output
Verified by registration
△
Common Failure Points
Timing chain tensioner wear similar to 1.5L; water pump seal leaks after 60k miles
Production Years: Check by registration
Compare MG 3 1.3L petrol engine pricesMG 3 Engines Fuel Type
MG 3 Engines by Fuel Type
Choose your MG 3 engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early 1.3L VTi-Tech to the latest Hybrid+ L3A.
MG 3 Petrol Engines
PetrolThe MG 3 was offered exclusively with naturally aspirated petrol engines across all UK generations, with the 1.5L VTi-Tech dominating replacement enquiries due to timing chain and oil consumption concerns.
Common MG 3 Petrol Engine Families
- •15S4C - most common replacement engine (3Style/Excite), timing chain risk pre-2018
- •15S4E - facelift injector carbon buildup focus, stop-start traffic prone
- •13S4C - entry-level 1.3L, less common but simpler maintenance profile
Found In
- •AP32 chassis (2013-2024) - 15S4C/D/E/F/G variants across all trims
Known For
- •Strong value proposition with low purchase price and simple NA design
- •Timing chain tensioner wear on pre-2018 units requiring preventative attention
- •Oil consumption on high-mileage examples addressed in rebuilt units with revised rings
Typical Petrol Models
- •3Time
- •3Form
- •3Style
1 of 2
MG 3 Petrol Engines
PetrolThe MG 3 was offered exclusively with naturally aspirated petrol engines across all UK generations, with the 1.5L VTi-Tech dominating replacement enquiries due to timing chain and oil consumption concerns.
Common MG 3 Petrol Engine Families
- •15S4C - most common replacement engine (3Style/Excite), timing chain risk pre-2018
- •15S4E - facelift injector carbon buildup focus, stop-start traffic prone
- •13S4C - entry-level 1.3L, less common but simpler maintenance profile
Found In
- •AP32 chassis (2013-2024) - 15S4C/D/E/F/G variants across all trims
Known For
- •Strong value proposition with low purchase price and simple NA design
- •Timing chain tensioner wear on pre-2018 units requiring preventative attention
- •Oil consumption on high-mileage examples addressed in rebuilt units with revised rings
Typical Petrol Models
- •3Time
- •3Form
- •3Style
MG 3 Hybrid / Electrified Engines
MHEVThe 2024+ MG 3 Hybrid+ introduces SAIC's L3A full-hybrid system, requiring specialist diagnostics and replacement expertise distinct from standard petrol units.
MG 3 Hybrid+ Engine Codes
- •L3A - full hybrid powertrain with integrated MGU and DC-DC converter
- •15S4G - mild-hybrid prep variant for transitional models
- •100kW electric motor provides instant torque at low speeds
Found In
- •Hybrid+ SE, Trophy (ZP22 chassis, 2024-present)
Important Notes
- •Standard petrol engines are not compatible with Hybrid+ chassis wiring
- •Replacement requires SAIC-certified diagnostics for inverter sync
- •Availability more limited than standard engines; specialist quotes recommended
Not sure which fuel type your MG 3 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 3 specialists.
Engine YearsGet quotes for 2013-2015 MG 3 replacement engines →
MG 3 Engines by YearWhat Was Fitted & WhenMG 3 Engines by Year - What Was Fitted & When
This section covers all major engine changes across the MG 3's UK production timeline, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
⚙Key Changes
- ✓UK market launch with AP32 chassis, assembled at Longbridge until 2016
- ✓Introduction of 1.3L 13S4C and 1.5L 15S4C VTi-Tech engines
- ✓Trim levels: 3Time, 3Form, 3Style, Excite
▣Main Engines
13S4C- 1.3L petrol (3Time entry trim)
15S4C- 1.5L petrol (3Form/3Style/Excite volume seller)
▰Popular Models
- •MG 3 3Time
- •MG 3 3Form
- •MG 3 3Style
- •MG 3 Excite
🔧Known For
- ✓Strong value proposition with low purchase price and simple NA design
- ✓Timing chain tensioner wear emerges as dominant failure mode after 60k miles
- ✓Piston ring land oil consumption on high-mileage examples
- ✓Basic interior materials prone to wear but mechanically straightforward
Engine Codes Covered:
13S4C15S4CNot sure which year your MG 3 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 3 specialists.
FAQ