M1392.0L Petrol
The M139 is AMG's hand-built 2.0L turbocharged 4-cylinder, signed by a single technician under the 'One Man, One Engine' philosophy. Producing up to 421 hp in the A45 S, it is the most powerful series-production 4-cylinder ever built. Fitted to compact AMG models from 2019 onwards, it shares its block with no other engine — a unique design with the turbocharger reversed and the exhaust manifold facing the firewall for shorter pipework.
7
Fits chassis
2019–null
Years built
421 hp
Power
Used to fully refurbished — quoted per unit
3-month parts warranty
Cover on every used part we dispatch.
Nationwide courier
Courier Guy & Aramex — door to door.
Fitment guaranteed
Send your VIN — we confirm before you pay.
Bench-tested
Inspected and tested before dispatch.
M139 at a glance
| Displacement | 2.0L |
| Fuel type | Petrol |
| Power variants | 306 hp, 382 hp, 387 hp, 416 hp, 421 hp |
| Years produced | 2019–null |
| Replaces | M133 |
| Replaced by | — |
M139 fits these 7 Mercedes chassis
Each card links to that chassis hub — full parts catalogue plus fitment notes.
- W1772019-2025A-ClassA45 AMG/A45 S AMGView parts
- C1182019-2025CLA-ClassCLA45 AMG/CLA45 S AMG
- X1182019-2025CLA Shooting BrakeCLA45 AMG
- W2472020-2025GLA-ClassGLA45 AMG/GLA45 S AMGView parts
- H2472020-2025GLA-ClassGLA45 AMG
- X2472020-2025GLB-ClassGLB35/GLB45 AMG
- C1902024-2025AMG GTProject ONE-derived hybrid applications
Common M139 problems
We disclose every known fault before sale. Transparency is cheaper than a bad return.
- Carbon buildup on intake valves due to direct injection (walnut blasting required at high mileage)
- Turbocharger oil seal leaks under sustained track use
- Coolant pump electric motor failures on early production engines
- High-pressure fuel pump issues on heavily tuned units
- Engine mount wear under aggressive launch use causing vibration
Featured parts for the M139
No live M139 listings right now
We strip 10–15 cars a month. Send your VIN and we'll WhatsApp you the moment one comes in.
M139 rebuilds — what to budget
Bench-tested used long blocks start around R 140 000 delivered, full forensic rebuilds with new wear items run up to R 220 000. Final price depends on mileage, ancillaries (turbo, injectors, flywheel) and warranty tier — quoted per unit, no list-price surprises.
Send us your VIN — we'll match the right unit
We confirm engine number, ancillaries and warranty tier in writing before you pay.
Tell us about your Mercedes — we'll source the M139
Three short steps. We reply within 2 hours during business hours with engine number, mileage, condition and a delivered price.
- Engine number confirmed against your VIN
- Bench-tested before dispatch
- 3-month warranty + nationwide courier
M139 engine — common questions
Door-to-door courier from R 199
All major SA cities · 1–3 working days · Insured shipping on every order · Couriered from Centurion