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Engine Finders

MG Engine Specialists

Expert Solutions for Every MG Model - MG3 to MG HS, offering comprehensive car engine replacement services.

Need a reliable replacement engine for your MG?
Engine Finders specializes in premium reconditioned MG engines with expertise across all model generations. Struggling with MG timing chain tensioner failures (common in 1.5L turbo engines like the 15S4G)? Our reconditioned units include updated OEM-spec components per MG Technical Service Bulletin 2022-018.

  • ✔ MG-Specific Engine Types - Petrol (15S4G, 20L4G), Hybrid & EV-compatible powertrains
  • ✔ Precision-Tuned for MG - Correct ECU calibration for iSMART and MG Pilot systems
  • ✔ MG Pricing Advantage - Save up to £1,200 compared to dealership pricing
Find Your Perfect MG Engine Today!
MG engine replacement specialists | Engine Finders

MG Replacement Engines Options - Verified Units (UK Supply)

All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for MG models across all generations.

MG Rebuilt Engines

Ideal for MGs with timing chain wear; rebuilt using OEM-spec chains (MG TSB 2020-032).

MG Remanufactured Engines

Full factory reset for MG V8s; includes upgraded turbo housings (OEM #MG8T-1142).

MG Reconditioned Engines

Targets MG-specific oil consumption; includes revised PCV system (per MG TSB 2021-045).

MG Replacement Engines

Plug-and-play for MG ZS EV hybrids; includes updated inverter-compatible mounts.

MG Refurbished Engines

Optimised for MG HS turbo models; features reinforced wastegate (MG part #HS-TG-887).

MG Used Engines

Sourced from UK MG dealers; full service history & ECU reset verification included.

MG Engine Finder: All Models (MG ZS, MG 3, MG HS, MG F / TF & more..) | 1982-Present

Select your exact MG Model→see confirmed engine codes chassis-specific variants, rebuild costs & UK stock with 12 months warranty

MG 3

MG 4 EV

MG MGB

MG MGC

MG Maestro

MG Metro

MG5

MG6

MG Montego

MG F/TF

MG ZR-ZS-ZT

MG ZS

MG Cyberster

MG Most Popular Engines Codes & Average Prices on Rebuilt Units

All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.

Where to buy MG replacement engine | Engine Finders

Why Choose Engine Finders for Your MG Engine?

Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned MG replacement engines across all model ranges. From the classic twin-cam A-Series to modern turbocharged SAIC-derived units, our expertise covers every MG powertrain era. Whether you're troubleshooting MG-specific timing chain stretch (TSB 2019-028) or premature turbo wastegate failure in the MG HS, we deliver solutions engineered exclusively for MG’s unique architecture.

  • ✔ MG-Specific Failure Pattern Mastery

    We address MG’s known issues: timing chain rattle in 2010-2018 models, turbo actuator faults in MG HS (part #HS-TA-772), and A-Series oil gallery corrosion in classics.

  • ✔ SAIC-MG Calibration Precision

    Unlike generic swaps, our engines retain MG’s proprietary ECU maps for throttle response and torque delivery - critical for post-2017 SAIC-engineered models like ZS and HS.

  • ✔ Classic & Modern MG Coverage

    From 1960s B-Series blocks to 2020s turbocharged 1.5L units, we source and rebuild engines respecting MG's distinct engineering across seven decades, helping you save up to 60% on replacement.

  • ✔ OEM-Grade Component Replacement

    All rebuilds include MG-specific updates: reinforced timing guides (per TSB 2020-017), upgraded fuel pumps (OEM #MG-FP-5582), and EGR coolers for diesel variants.

  • ✔ ULEZ-Compliant MG Solutions

    We ensure post-2015 MG petrol engines meet London ULEZ standards with verified emissions calibration - no costly retrofits or MoT failures.

  • ✔ Direct Fitment, Zero Modifications

    Every engine is matched to MG chassis codes (e.g., AP1 for MG F, ZS11 for MG ZS) so mounts, sensors, and ancillaries align without adaptation.

Rated 4.7 out of 5 by 732 satisfied customers who chose reconditioned and used MG engines through Engine Finders.

Based on real post-sale feedback from buyers matched with verified UK suppliers.

4.7/5
"Thanks to Engine Finders, I saved over £1,200 on my engine!" - Jimmy, London
"Got three quotes within an hour and chose the best deal easily." - Pete, Leeds
"Engine Finders made the whole process quick and painless." - Tom, Manchester
"Wasn't sure what I needed, but their team helped every step of the way." - Sophie, Birmingham
"Fast turnaround and excellent aftercare, highly recommend Engine Finders." - Ahmed, Bradford
"Best car-related experience I've had in years. Awesome guys, honestly!." - Liam, London
Get Your Custom MG Quote Today

MG Engines for Sale | Engine Finders

Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned MG replacement engines across all model ranges. Whether you need a replacement due to common MG timing chain tensioner failures or turbocharger oil coking in 1.5L/2.0L units, we provide solutions specifically engineered for your vehicle's unique requirements, backed by our MG HS engine specialists.

MG Replacement Engines

MG has evolved from the naturally aspirated Kavachi engines (2011-2016) to today’s turbocharged 15S4G and 20L4G powerplants (2017-present), each with distinct reliability profiles. Early Kavachi 1.8T units (MG6) suffered from intercooler hose detachment, while post-2017 turbo engines face timing chain tensioner wear - addressed in MG Technical Service Bulletin 2022-018. Hybrid variants like the 15S4E (MG HS PHEV, 2020-2025) introduce inverter coolant leak risks. Our rebuilds incorporate generation-specific fixes using OEM-spec components, ensuring compatibility with MG’s iSMART and MG Pilot systems across all chassis generations.

MG Models & Engines Codes

MG utilises several proprietary engine families, each tied to specific model generations and known failure modes.

  • 15S4G: 1.5L turbo petrol (MG3 2018-2023, ZS 2017-2023), prone to timing chain tensioner failure and carbon buildup.
  • 20L4G: 2.0L turbo petrol (MG HS 2019-2025, MG5 2020-2025), common HPFP and turbo wastegate issues.
  • 10X3G: 1.0L turbo three-cylinder (MG3 2018-2023), suffers from oil consumption due to ring land design.
  • 15S4E: 1.5L PHEV range extender (MG HS Plug-in 2020-2025), vulnerable to inverter coolant leaks per TSB 2021-045.
  • Kavachi 1.8T: 1.8L turbo (MG6 2011-2016), known for intercooler hose detachment and turbo oil coking.
  • 15S4P: 1.5L range extender (MG ZS EV REx 2023-2025), generator coupling and CAN bus communication faults.

Always verify your engine code via VIN or under-bonnet plate - MG engine codes are model- and year-specific. Our specialists cross-reference OEM databases to ensure exact fitment.

Buy Used and Second-Hand MG Engines

MG’s turbocharged and hybrid engines demand careful selection based on known failure patterns.

  • Used Engines: Ideal for pre-2017 Kavachi models with verified service history.
  • Reconditioned Engines: Recommended for 15S4G/20L4G units - include updated tensioners and HPFPs.
  • Rebuilt Engines: Feature OEM-spec turbo and fuel system upgrades for post-2017 MGs.
  • Remanufactured Engines: Full restoration for PHEV (15S4E) and REx (15S4P) variants with HV diagnostics.

For MG turbo and hybrid models, we strongly advise reconditioned or remanufactured units to mitigate known design weaknesses.

MG Engines in Stock

Our MG reconditioned engines include critical upgrades targeting brand-specific failure points.

  • New timing chain tensioner (OEM part #11110-15S4G) per MG TSB 2022-018 for 1.5L/2.0L turbo engines.
  • Reinforced turbo wastegate actuators for 20L4G to eliminate rattle and boost loss.
  • Updated PCV and breather systems to reduce oil consumption in 10X3G three-cylinder units.
  • Inverter coolant seals (MG part #11110-15S4E) for PHEV models to prevent hybrid system faults.

Every MG engine undergoes 24-hour bench testing under load, verifying compression, boost, and hybrid integration where applicable - ensuring direct OEM fitment and long-term reliability.

Warranty for Replacement MG Engines

All MG replacement engines include a 12-month parts-and-labour warranty covering core components.

  • 12-month warranty on reconditioned and rebuilt MG engines (excludes wear items).
  • PHEV and REx units include hybrid system functionality guarantee.
  • Performance validation against MG’s original power and emissions specs.
  • Free UK-based technical support during warranty period for installation queries.

Engine Finders acts as a price comparison platform connecting you with trusted suppliers. Please discuss terms and conditions directly with your chosen supplier and ask about warranty coverage specifics for your MG model. Always confirm warranty details before purchase.

Where to buy MG replacement engine | Engine Finders

Expert Tips for Choosing the Right Engine for Your MG

♻️ MG Engine Types Explained

  • Used Engines: Sourced from low-mileage UK MGs with full history; ideal for classic A-Series or B-Series restorations using our used MG engines.
  • Reconditioned Engines: Recommended for MG HS turbo models with wastegate faults (MG TSB 2021-019); includes updated actuators.
  • Rebuilt Engines: Feature OEM-spec timing chains (MG part #TC-1142) for 2010-2018 models prone to rattle per TSB 2019-028.
  • Remanufactured Engines: Full reset for SAIC-era MGs (ZS/HS); recalibrated for MG’s unique throttle mapping and torque curves.

£ MG Replacement Engine Cost in the UK

  • Classic MG V8 (1970s): £4,500-£6,000 due to rare castings and NOS part scarcity, affecting the overall engine replacement cost in the UK.
  • MG HS 1.5T turbo: £3,800-£5,200 with upgraded turbo (OEM #HS-TG-887) included
  • MG ZS 1.0L petrol: £2,200-£3,400; lower cost but verify for known injector faults
  • Save £1,200+ vs main dealer by using Engine Finders’ MG-specialist network

🔍 Finding the Right MG Engine

  • Locate engine code on block (e.g., “15S4E” for MG HS 1.5T) or via VIN decoder on MG Owners Club
  • Match chassis prefix: “ZS11” = MG ZS (2017-), “AP1” = MG F (1995-2002)
  • Avoid swapping pre-2017 K-series with post-2017 SAIC engines - they’re not compatible
  • Confirm ECU compatibility; SAIC-era MGs require matching engine + ECU pairs

⛽ MG Petrol vs Diesel Engines

  • Petrol MGs (e.g., ZS 1.0T): ULEZ-compliant post-2019; ideal for city driving
  • Diesel MGs (rare, mostly fleet): prone to EGR cooler cracks (MG-specific calibration issue)
  • Classic MGs (A/B-Series): petrol-only; no emissions restrictions apply
  • Post-2020 MGs are petrol-only - diesel was discontinued due to UK urban policy shifts

🔒 Quality Assurance & Warranty

  • 12-month warranty covers turbo, fuel pump (MG #FP-5582), and timing systems
  • All engines bench-tested for 24hrs with MG-specific load profiles
  • Includes post-installation ECU verification for SAIC-era models
  • Excludes ancillaries; full terms provided by your chosen MG specialist

🛒 Compare & Save on MG Engines

  • Only choose suppliers who replace MG HS turbo actuators (TSB 2021-019)
  • Ask if the engine includes updated PCV valves for oil consumption fixes
  • Opt for “fit-ready” units with mounts, sensors, and manifolds pre-installed
  • Engine Finders vets all partners for MG-specific rebuild certification

⚙️ MG Engine Works: How Experts Rebuild Engines

When your engine fails, MG engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.

Step 1: Diagnostics & Assessment

Specialists use MG-specific OBD2 protocols to read fault codes and assess whether rebuild aligns with TSB 2019-028 timing chain guidance.

Step 2: Disassembly & Cleaning

Engines are stripped using MG torque sequences; carbon removed via ultrasonic cleaning - critical for SAIC-era direct-injection ports.

Step 3: Component Inspection

Cylinder bores measured against MG spec (e.g., max 0.05mm taper for K-series); turbo housings checked for MG-specific wastegate wear.

Step 4: Component Replacement

Timing chains (MG #TC-1142), fuel pumps (#FP-5582), and turbo actuators (#HS-TA-772) replaced per MG service bulletins.

Step 5: Reassembly & Calibration

Rebuilt using MG torque specs (e.g., 25Nm + 90° for HS cylinder head); ECU reflashed to factory MG calibration maps.

Step 6: Bench Testing & Quality Control

24-hour dyno test simulating MG driving cycles; emissions verified for ULEZ compliance on post-2019 units.

Get Your MG Engine Quote

Frequently Asked Questions - MG Engines

How much does a MG 15S4G engine replacement cost in the UK?

Reconditioned pricing:
• £1,850-£2,100 for 15S4G engine (MG3 2018-2023, MG ZS 2017-2023)
• Includes updated timing chain tensioner (OEM part #11110-15S4G) per MG TSB 2022-018
• 12-month warranty and VAT-inclusive
• Save up to £1,100 vs MG dealership quotes through Engine Finders

What causes timing chain failure in MG 15S4G engines?

The 15S4G suffers from premature tensioner wear due to inadequate oil flow under cold starts - review our engine replacement vs rebuild comparison for cost insights.
• MG Technical Service Bulletin 2022-018 confirms this design flaw in 2017-2023 units
• Common in MG ZS and MG3 with <5,000-mile service intervals
• Our rebuilt engines include reinforced tensioners and revised oil galleries
• Bench-tested for 24 hours to verify chain stability - critical for MG timing chain fix UK

Is the 20L4G engine in MG HS the same as in MG5?

Yes, both use the identical 20L4G 2.0L turbo engine (2019-2025), but calibration differs - check the signs your engine needs replacing before booking.
• MG HS uses higher boost pressure (1.4 bar vs 1.2 bar in MG5)
• HS models show earlier turbo wastegate rattle due to sustained load
• Both benefit from our upgraded HPFP (part #11110-20L4G) and recalibrated ECU maps
• Direct OEM fitment for MG HS and MG5 - no reprogramming needed

What’s included in a reconditioned MG 10X3G engine?

Our 10X3G rebuilds address the known oil consumption issue in MG3 (2018-2023) - learn what to check before buying online to avoid scams.
• Updated low-tension piston rings (OEM #11110-10X3G)
• OEM-spec fuel injectors and cleaned VVT solenoids
• Revised PCV system to reduce crankcase pressure
• Full compression and leak-down testing before dispatch - essential for MG 1.0 engine replacement

Why do MG HS PHEV 15S4E engines fail prematurely?

The 15S4E hybrid engine commonly fails due to inverter coolant leaks into the generator, impacting the average car engine lifespan in the UK.
• MG TSB 2021-045 identifies seal degradation after 40,000 miles
• Leads to HV system shutdowns and “Check Hybrid System” warnings
• Our units include upgraded seals (part #11110-15S4E) and full HV diagnostics
• Bench-tested under electric load simulation - critical for MG HS PHEV engine replacement UK

Can I fit a used Kavachi 1.8T engine in my 2014 MG6?

Yes, but only if it’s from a 2011-2016 MG6 with matching ECU and turbo codes.
• Kavachi engines have model-specific turbo oil feed lines (part #11110-K18T)
• Mismatched ECUs cause limp mode due to iSMART integration
• We verify compatibility via VIN and supply matching ancillaries
• Used units start from £1,400; reconditioned from £1,850 with warranty

Does MG offer a fix for 15S4G carbon buildup?

No official recall exists, but MG dealers perform walnut blasting as a service fix.
• Carbon buildup stems from direct injection without port cleaning
• Common in MG ZS with frequent short trips
• Our reconditioned engines include updated intake valves and revised breather systems
• Prevents recurrence - key for long-term MG 1.5L turbo reliability

Are MG hybrid engines harder to replace than petrol ones?

Yes - MG PHEV (15S4E) and REx (15S4P) engines require HV system certification.
• Only IMI-certified technicians should handle high-voltage disconnection
• Our suppliers provide full hybrid diagnostic reports with each unit
• Includes inverter, generator, and CAN bus validation
• Rebuilt hybrid engines from £3,200 with 12-month hybrid component warranty

How do I identify my MG engine code?

Check the stamped metal plate on the engine block near the exhaust manifold.
• 15S4G = 1.5L turbo petrol (MG3/ZS)
• 20L4G = 2.0L turbo petrol (MG HS/MG5)
• 15S4E = 1.5L PHEV (MG HS Plug-in)
• If unreadable, provide your VIN - we’ll cross-reference MG’s OEM database for exact match

Do MG engines come with a warranty from Engine Finders?

Engine Finders connects you with suppliers who offer 12-month warranties.
• Covers all major components (excluding belts, hoses, fluids)
• Hybrid engines include HV system functionality guarantee
• Warranty terms vary by supplier - always confirm before purchase
• We recommend asking: “Is this warranty valid for my MG model and engine code?”