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Mercedes‑AMG M133 Engine (2013–2019): High‑Performance Inline‑4 Excellence
The M133 is a handcrafted, turbocharged 2.0 L inline‑4 engine developed by Mercedes‑AMG. Debuted in 2013, it powered compact AMG models like the CLA 45 AMG, A 45 AMG, and GLA 45 AMG, earning multiple “International Engine of the Year” awards
This engine not only exemplifies Mercedes-Benz’s engineering prowess but also marks AMG’s commitment to delivering exhilarating performance, even in smaller, lighter vehicles.
The M133 engine has gained a reputation for providing impressive power, responsiveness, and driving pleasure in a variety of models, making it a standout in the world of high-performance engines.
Technical Specifications & Model Variants
| Variant | Power Output | Torque | Production Years |
|---|---|---|---|
| M133 DE20 LA | 265 kW (360 PS) @ 6,000 rpm | 450 Nm @ 2,250–5,000 rpm | 2013–2015 |
| 2015+ M133 Upgraded | 280 kW (381 PS) @ 6,000 rpm | 475 Nm @ 2,250–5,000 rpm | 2015–2019 |
Packed with AMG enhancements such as a twin-scroll turbocharger, zircon-infused cylinder heads, nanoslide-treated cylinder walls, and SLS AMG-inspired cooling architecture.
What makes the M133 engine truly remarkable is its advanced engineering. The twin-scroll turbocharger minimizes lag while maximizing airflow, resulting in quick spool-up and enhanced throttle response. Forged pistons and high-strength materials ensure the engine can handle high boost pressures, while maintaining longevity and reliability under strenuous conditions.
The 2.0-liter displacement might seem small compared to traditional performance engines, but AMG’s engineering turns this compact block into a formidable source of power. It’s also worth noting that the M133 was, for a time, the most powerful production 4-cylinder engine in the world, a title it held until its successor, the M139, surpassed it.
Performance and Driving Experience
The M133 engine transforms everyday driving into a thrilling experience. With its 0-60 mph times as low as 4.1 seconds in models like the CLA45 AMG, the M133 delivers sports car performance in a compact package. The ample torque spread ensures strong acceleration at any speed, while the high-revving nature of the engine keeps drivers engaged and excited.
In terms of handling, the M133 is perfectly paired with AMG-tuned suspension systems, providing a balanced yet aggressive driving experience. The turbocharged nature of the engine means that drivers can expect some turbo lag at lower RPMs, but once the turbo kicks in, the engine delivers an explosive surge of power. The throttle response, particularly in Sport and Race modes, is sharp and responsive, allowing drivers to fully exploit the car’s capabilities.
Models Equipped with the M133 Engine
The M133 engine found its home in several high-performance AMG models. Below are the primary Mercedes models that come equipped with this engine:
A45 AMG: The high-performance variant of the A-Class, offering agile handling and explosive acceleration thanks to the M133 engine.
CLA45 AMG: A compact four-door coupe that blends style with raw power, the CLA45 AMG delivers supercar performance in a sleek, stylish package.
GLA45 AMG: The GLA45 AMG gives the small SUV a new meaning, offering robust power while maintaining practicality and compactness.
These models, powered by the M133 engine, not only offer top-tier performance but also showcase AMG’s ability to infuse even compact vehicles with unmatched power and precision.
Reliability: Common Problems & Causes
No engine is perfect, and the M133 is no exception. While generally regarded as reliable, there are a few common issues that owners and technicians have reported:
| Issue | Symptoms/Signs | Recommended Action |
|---|---|---|
| Turbocharger stress/failure | Loss of boost, turbo noise, oil in intake tract | Inspect turbo, replace cartridge/components as needed |
| Timing chain stretch | Rattle at idle or startup, erratic performance | Monitor chain slack; adjust or replace early if needed |
| Carbon buildup (direct injection) | Flat spots, rough throttle response | Use cleaning service or walnut-blasting as preventive maintenance |
| Cooling or thermal stress | Overheat, power loss under sustained load | Inspect cooling passages; ensure radiator and pump function |
| Elevated oil consumption | Needing frequent top-ups | Inspect PCV valve, valve stem seals, and crankcase ventilation |
| Engine shake or bearing knock | Rod knock, excessive vibration at load | Diagnose rod bearing health promptly |
Despite these concerns, the M133 engine is known for its robustness, especially when maintained correctly. Proper oil changes, cooling system maintenance, and keeping up with scheduled service intervals will help ensure longevity and reliability.
Performance & Maintenance Insights
Owners praise the M133 for its raw power and durability:
“This little motor is solid I have 100s of launches on mine at over 30 psi.” enthusiast comment
Maintenance Tips:
- – Use full synthetic oil (5W‑40 recommended), 6.5 L capacity, with service every 10,000 mi (≈16,000 km)
- – Schedule carbon cleaning and turbo inspection regularly
- – Avoid excessive sustained high-load driving without cooldown cycles
- – Keep engine cooling components and oil quality in check
M133 Engine Maintenance and Oil Capacity
To keep the M133 engine in peak condition, regular maintenance is crucial. The engine has an oil capacity of 6.5 liters, and Mercedes recommends using 5W-40 synthetic oil for optimal performance. Scheduled oil changes every 10,000 miles (or sooner, depending on driving conditions) will help prevent wear and tear.
In addition to oil changes, it’s essential to monitor coolant levels and ensure that the turbo system is functioning efficiently. Regular inspections of hoses and gaskets for leaks, and routine service of the turbocharger, will ensure the engine continues delivering top-tier performance.
Comparison with Other AMG Engines
What is the difference between M133 and M139 engine?
The M133 engine’s successor, the M139 Engine, now holds the crown as the most powerful 4-cylinder production engine, boasting over 416 horsepower in some models. While the M139 improves on the M133 in terms of power and efficiency, the M133 remains a significant milestone in AMG’s engine lineup.
Compared to larger AMG engines, such as the M276 V6 Engine or the M177 V8, the M133’s compact size and turbocharged nature make it ideal for smaller, lighter vehicles. While it doesn’t have the same sheer torque or top-end performance as the V8s, the M133 excels in providing a balance of power and efficiency in a compact form factor.
Conclusion
The Mercedes M133 engine remains an impressive feat of engineering, providing sports car-level performance in smaller AMG models. Its innovative design, turbocharged power, and driving dynamics have earned it a place in the history of high-performance engines. Despite some common issues, proper maintenance ensures that the M133 remains a reliable and powerful engine for years to come.
With its potent performance and AMG pedigree, the M133 engine continues to offer an exhilarating experience, making it a favorite among enthusiasts and drivers looking for maximum performance in a compact vehicle.
Frequently Asked Questions
What vehicles use the M133 engine?
The M133 powers AMG variants of compact models: A45 AMG, CLA45 AMG, and GLA45 AMG (2013–2019).
Is the M133 engine reliable?
Yes, when maintained. Watch turbo health, timing chain status, and manage thermal load carefully.
Why does the turbo fail prematurely?
High operating temperatures and aggressive driving can cause shaft play or seal failure—regular inspection helps.
How do I prevent carbon build-up?
Use quality fuel, clean intake occasionally, and consider walnut-blast cleaning at major services.
When to service the oil?
Service every ~10,000 mi (≈16k km) with 5W‑40 synthetic oil, especially if driving spiritedly.
