Covers MG petrol, diesel, and hybrid engines used across UK and European models - from classic A-Series and B-Series engines to modern VTi-Tech and turbocharged SGE units. Each engine code includes specifications, compatible vehicles, and emissions data, sourced from official MG Motor and EU records.
Data sourced from MG Motor Technical Documentation, EU Regulation (EC) No 715/2007, and SAIC Motor Engineering Reports.
Find MG engine codes by family, model, or generation
| Engine Code | Fuel Type | Series | Specifications |
|---|---|---|---|
| Petrol | 1 5l Egt | View Specs | |
| Petrol | 1 5l Phev Turbo | View Specs | |
| Petrol | 1 5t Egt | View Specs | |
| Petrol | 1 5t Gdi | View Specs | |
| Petrol | 1 5t Phev | View Specs | |
| Petrol | 15e4e | View Specs | |
| Petrol | 18k4e | View Specs | |
| Petrol | 2 0l Plug In Hybrid | View Specs | |
| Petrol | 2 0t | View Specs | |
| Petrol | 2 0t Mge | View Specs | |
| Petrol | 20a4e | View Specs | |
| Petrol | 20l4e | View Specs | |
| Petrol | CT-Series | View Specs | |
| Petrol | E-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electricity | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs | |
| Electric | EMG-Series | View Specs |
Explore MG's electrified powertrain technologies.
Engine specifications and technical data sourced from MG Motor Technical Documentation and EU Vehicle Type Approval Database. All specifications are verified against official MG service documentation.
The engine code is essential for ordering parts, diagnosing issues, and verifying compatibility. It is not the same as the VIN or chassis number. This guide shows exactly where to find it - by model and engine type - using official MG Motor and DVLA sources
A unique identifier stamped on the engine block or cover used for parts and service.
The vehicle identification number that holds encoded vehicle and engine information.
The chassis or frame number used for registration and legal identification.
Locate the engine code on a label attached to the camshaft cover or timing belt cover. It is typically a white or silver sticker showing '15S4C' for the 1.5L VTi-Tech engine.
The engine code is located on a label near the turbocharger or on the engine block. Look for '15C4E' designation for the 1.5L turbocharged engine producing 169 PS.
Open the bonnet and look at the top of the engine. The code is on a label attached to the camshaft cover or valve cover. Confirm '15S4C' for the 1.5L naturally aspirated engine.
The engine code is cast into the engine block or on a label near the inlet manifold. Look for '18K4F' for the 1.8L turbocharged petrol engine.
Engine code locations per MG Motor Service Documentation. V5C field definitions from DVLA Guide to Vehicle Registration. VIN structure compliant with EU Regulation (EC) No 715/2007, Article 7.
A technical breakdown of MG's core engine systems including VTi-Tech, SGE turbocharged engines, timing architectures and modern design with documented reliability impacts. All data sourced from MG Motor Technical Documentation, SAIC Motor Engineering Reports and EU Regulation (EC) No 715/2007
MG's VTi-Tech (Variable Timing Intelligence) is a naturally aspirated engine family featuring DOHC configuration with variable valve timing for improved efficiency and performance across the rev range.
The VTi-Tech system uses variable camshaft timing on the intake side to optimize valve timing based on engine speed and load, improving low-end torque and high-RPM power while maintaining fuel efficiency.
13S4C (1.3L)
Entry-level variant
15S4C (1.5L)
Main production engine
15S4C updated (2018)
Improved emissions, Euro 6
Timing belt maintenance
Regular replacement required at 60,000 miles
EGR valve clogging
Common in urban driving conditions
Oil consumption
Some units report increased consumption after 80,000 miles
MG's VTi-Tech (Variable Timing Intelligence) is a naturally aspirated engine family featuring DOHC configuration with variable valve timing for improved efficiency and performance across the rev range.
The VTi-Tech system uses variable camshaft timing on the intake side to optimize valve timing based on engine speed and load, improving low-end torque and high-RPM power while maintaining fuel efficiency.
13S4C (1.3L)
Entry-level variant
15S4C (1.5L)
Main production engine
15S4C updated (2018)
Improved emissions, Euro 6
Timing belt maintenance
Regular replacement required at 60,000 miles
EGR valve clogging
Common in urban driving conditions
Oil consumption
Some units report increased consumption after 80,000 miles
All technical descriptions and failure data sourced from MG Motor Product Technical Reports, SAIC Motor Service Information, and EU Regulation (EC) No 715/2007 on vehicle type-approval.
Track BMW engineering across decades
Foundation years establishing MG's sports car DNA with simple, durable overhead-valve engines.
Classic overhead-valve four-cylinder that defined MG's sports car heritage with robust construction and tunable performance.
Versatile small engine that became BMC's workhorse, powering countless models with simple, reliable design.
Engine production years verified via MG Motor Historical Records, SAIC Motor Reports, and EU type-approval records
Authoritative data on MG's global engine production, plant operations, and strategic partnerships. All figures sourced from SAIC Motor Annual Reports, Sustainability Reports, and EU industrial compliance records.
MG engines are manufactured at SAIC Motor facilities globally, with key production hubs in China and historical UK operations.
MG produces approximately 350,000+ engines per year. Note the complete phase-out of diesel by 2023 and rapid growth in hybrid and electric powertrains.
Note: Diesel production was discontinued in 2016 due to Euro 6d compliance costs. MG has rapidly expanded EV and hybrid production to meet EU 2035 ICE phase-out targets.
SAIC Motor collaborates with General Motors and other partners for technology sharing and joint development.
SGE (Small Gasoline Engine) co-developed with GM
Manufactured at SAIC facilities for MG and GM brands
SAIC Motor Strategic Partnerships – GM Collaboration
Shift in production reflects EU emissions policy and MG's electrification strategy.
This aligns with Commission Regulation (EU) 2017/1151 (WLTP/RDE) and EU 2035 ICE phase-out roadmap.
Engine production data verified via SAIC Motor Annual Reports and EU type-approval records
The most common questions about engine codes, what they mean, how to find them and how this database works
An MG engine code (e.g., 15S4C, 15C4E) identifies the engine family, displacement, and technology. The numbers indicate displacement (15 = 1.5L), letters indicate technology (S = naturally aspirated, C = turbocharged), and final digits indicate variant. Source: MG Motor Technical Documentation
No. MG discontinued diesel engines in 2016 when the 1.9 DTi-Tech was dropped from the MG6 due to Euro 6 emissions compliance costs. MG now focuses exclusively on petrol, hybrid, and electric powertrains. Source: Autocar, June 2016
The 15S4C VTi-Tech 1.5L naturally aspirated engine is widely regarded as MG's most reliable modern engine due to its simple design and proven technology. The newer 15C4E turbo is also reliable with proper maintenance.
Most modern MG engines use timing belts. The VTi-Tech family (15S4C, 13S4C) requires belt replacement every 60,000 miles. Some SGE turbo engines use timing chains designed for the life of the engine.
On the MG ZS with 15S4C VTi-Tech engine, the code is on a white or silver label attached to the camshaft cover or timing belt cover. Also check the V5C logbook under 'Engine Number'.
On the UK V5C registration document, look for the 'Engine Number' field (not VIN). This shows the engine code (e.g., 15S4C). If the engine was replaced, this may not reflect the current unit.
Yes, the 15S4C VTi-Tech 1.5L engine is generally reliable with proper maintenance. Common issues include EGR valve clogging in urban driving and timing belt maintenance at 60,000 miles. Overall durability is good with regular servicing.
15S4C: 1.5L naturally aspirated VTi-Tech (106 HP) – used in MG3, ZS. 15C4E: 1.5L turbocharged SGE (169 HP) – used in MG HS, ZS Turbo. Both are 1.5L but the turbocharged version offers significantly more power.
Yes. The engine code (e.g., 15S4C, 15C4E) is required for ordering correct parts (ECU, turbo, injectors). Using VIN alone can lead to errors. Always verify with the physical engine code on the engine.
Yes. High-performance engines (1.5L turbo in HS) or engines with known issues can increase premiums. Insurers use engine type to assess risk. Always declare the correct engine code.
The 15S4C VTi-Tech (2013–present) is designed for 150,000+ miles with proper maintenance. Regular timing belt changes at 60,000 miles and oil changes every 10,000 miles are critical for longevity.
Yes. Most modern MG engines including the 15S4C VTi-Tech and 15C4E turbo are interference engines. If the timing belt/chain fails, internal damage is likely. Immediate towing required if timing system fails.
VTi-Tech engines (15S4C, 13S4C) require timing belt replacement every 60,000 miles. Failure to replace can cause catastrophic engine damage. The turbocharged 15C4E uses a timing chain with longer service life.
Yes, but must be declared to DVLA. Changing engine code may affect MoT, insurance, and emissions compliance. Ensure the replacement engine meets Euro emissions standards for your vehicle's registration date.
Yes. The eHS PHEV uses a modified 1.5L turbocharged engine (similar to 15C4E) paired with an electric motor. The engine is de-tuned for hybrid efficiency and emissions compliance.
MG VINs (LSJW prefix for SAIC-made MGs) contain engine information in positions 7-8. However, MG VIN decoding is complex - use an MG-specific decoder or check the engine bay label for the exact code.
Classic MG engines (A-Series, B-Series, Rover V8) are simpler and easier to repair but less efficient. Modern MG engines (VTi-Tech, SGE) offer better fuel economy, emissions, and reliability but are more complex to service.
Use MG Motor Technical Service Information or SAIC Motor Engineering Reports. Public data is also available in EU type-approval documents. Source: MG Motor Service Documentation
MG recommends 5W-30 or 5W-40 fully synthetic oil meeting ACEA A3/B4 or A5/B5 specifications for the 15S4C VTi-Tech engine. Service interval: 10,000 miles or 12 months in UK conditions.
The MG6's 1.9 DTi-Tech diesel was discontinued in 2016 because updating it to meet Euro 6 emissions regulations was not economically viable. MG shifted focus to petrol and electrified powertrains. Source: Autocar, June 2016
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Information accurate as of 2025