Mercedes-Benz M157 Engine Review
Mercedes-Benz M157 Engine Review: Specs, Performance & Where to Buy
Mercedes-Benz M157 is not only an engine but a symbol of AMG engineering excellence. It is designed to provide exhilarating performance, and some of the most iconic AMG vehicles have been powered by it. Whether you are a collector in search of a replacement for your high-mileage motor, desire to build a high-performance project car, or simply require a Mercedes upgrade, this review will inform you why the M157 engine is the most sought-after engine—and why we are your best website to buy one.
In This Review:
- Overview and History of the M157 Engine
- Technical Specifications
- Performance Characteristics
- Reliability and Common Issues
- Ideal Vehicle Fitment
- Why Buy a Used or Rebuilt M157 Engine
- Why Buy from Us
- How to Order Your M157 Engine Today
What is the Mercedes-Benz M157 Engine?
The M157 is a 5.5-liter V8 biturbo engine that Mercedes-AMG designed. It was introduced in 2010 and replaced the naturally aspirated M156 6.2-liter V8 because of higher torque output and better fuel efficiency by forced induction. It can be viewed in many AMG vehicles like the E63 AMG, CLS63 AMG, S63 AMG, and G63 AMG.
Unlike its predecessor, the M157 uses brute force in combination with smart efficiency, thanks to such features as direct injection, twin-turbocharging, and aluminum construction to save weight. It’s a big departure from AMG’s previous engineering philosophy, one that stresses both performance and efficiency.
M157 Engine Specifications
Learning about the technical specifications of the M157 engine makes the case for why it’s such a bruiser. The main specs are listed below:
| Specification | Details |
|---|---|
| Engine Code | M157 DE 55 AL |
| Displacement | 5461 cc (5.5 liters) |
| Configuration | V8, 32-valve DOHC |
| Fuel System | Direct Injection |
| Forced Induction | Twin-turbocharged |
| Compression Ratio | 10.0:1 |
| Horsepower (variable) | 518–577 hp (base to performance pack) |
| Torque | 516–664 lb-ft |
| Redline | ~6400 RPM |
| Engine Block | Aluminum alloy |
| Cylinder Heads | Aluminum with DOHC |
| Turbocharger | Twin Garrett GT22 units |
| Transmission Compatibility | AMG SPEEDSHIFT MCT 7-speed |
| Fuel Type | Premium Unleaded |
Performance: Why the M157 is a Game-Changer
When AMG brought out the M157, it was an enormous leap forward for V8 force-induction technology. Even downsized from the M156’s 6.2-liter powerplant to 5.5 liters, the M157 still makes more torque at lower RPMs, delivering drivers that instant hit of power that defines modern-day AMG vehicles.
Acceleration & Real-World Power:
- 0–60 mph in as little as 3.5 seconds (in certain AMG models)
- Peak torque available as low as 1750 RPM
- Smooth power delivery throughout the RPM range
Even by today’s standards, the M157 is lightning-quick and can be easily modified to push 600+ horsepower with upgraded turbos and tuning.
Vehicle Fitment: Where You’ll Find the M157
The M157 engine was used in a variety of high-performance Mercedes-AMG vehicles from 2011 to 2019. Here’s a list of vehicles that came equipped with the M157:
- Mercedes-Benz E63 AMG (W212, S212)
- Mercedes-Benz CLS63 AMG (W218)
- Mercedes-Benz S63 AMG (W221, W222)
- Mercedes-Benz G63 AMG (W463)
- Mercedes-Benz ML63 AMG (W166)
- Mercedes-Benz GL63 AMG (X166)
- Mercedes-Benz CL63 AMG (C216)
If your vehicle is within these models, then the replacement or upgraded M157 is the perfect fit.
M157 Reliability: Strong But Discriminative
Though the M157 is generally strong, like every high-performance engine, there are a few maintenance areas it comes with:
Known Issues:
- Camshaft Adjusters – Rare failure point that causes rattling and rough idling.
- Turbo Oil Leaks – Due to worn seals; typically repaired with replacement parts.
- Timing Chain Stretch – High mileage, especially poor oil change history.
- PCV System Failure – Will cause excessive oil consumption or misfire.
- Carbon Buildup – All direct injection engines eventually.
But with quality oil and proper maintenance, the M157 is a very long-lasting engine, handily reaching beyond 150,000 miles. All our used and rebuilt M157 engines are inspected and rebuilt to eliminate such problems before they are sold.
Why Buy a Rebuilt or Used M157 Engine?
There are three main reasons that repair shops and enthusiasts buy a rebuilt or used M157 engine:
1. Cost Savings
A new AMG engine from the dealer can run over $40,000. Our refurbished and rebuilt M157 engines save customers a lot of money without sacrificing performance.
2. Performance Builds
Numerous clients buy the M157 for engine swapping and performance builds. Being a powerhouse with its robust internals and turbo feature, it is a popular choice for custom and tuning builds.
3. OEM Fitment & Compatibility
If you already own an M157-powered vehicle, a like-for-like replacement ensures trouble-free fitment and avoids complicated conversion processes.
Why Buy Your M157 Engine From Us?
We are Mercedes-AMG high-performance engine specialists with a focus on quality control, transparency, and customer service. Here are the reasons why we are different:
- ✔ Fully Tested & Inspected
All engines sold by us undergo a multi-point inspection. Compression, leaks, and turbo integrity are all verified. - ✔ Low Mileage Options
We offer low-mileage M157 engines from clean-title and service-recorded cars. - ✔ Rebuilt Options Available
Need the peace of mind? Contact us about our rebuilt M157 engines with new gaskets, seals, timing components, and more. - ✔ Warranty Included
Most of our engines include a 3–12 month warranty, depending on whether you choose a used or rebuilt engine. - ✔ Fast Shipping Nationwide
We offer fast and secure delivery across the U.S. with real-time tracking and insurance. - ✔ Professional Support
Our own staff of Mercedes-Benz specialists are available for fitment, installation, and technical questions.
Customer Reviews
“Bought a rebuilt M157 for my CLS63—runs like new. Shipped within a week, and their assistance aided my mechanic on install questions. Highly recommend.”
– Jason T., New York
“I’ve bought engines from several places before—this was by far the most professional experience. My G63 feels brand new again.”
– Michelle K., California
How to Order Your M157 Engine
Ordering your M157 engine is simple. Follow these steps:
- Contact Us – Call or fill out the online form with your vehicle’s VIN and delivery address.
- Choose Your Option – Select from available used, low-mileage, or rebuilt M157 engines.
- Secure Payment – We accept major credit cards, PayPal, and financing.
- Schedule Delivery – Choose a time that’s convenient for you. Let us take care of the rest.
- Get Installation Help – Having trouble finding a mechanic? We can connect you with certified partners in your area.
Final Thoughts: The M157 is a True AMG Icon
The Mercedes-Benz M157 engine is an engineering masterpiece, combining colossal power with breathtaking efficiency and longevity. Whether you’re rebuilding your AMG or building a customized performance vehicle, our used and remanufactured M157 engines for sale are the highest quality at the lowest price.
Don’t gamble with life and limb on untested providers or low-quality imports. Trust the experts who know Mercedes-Benz and AMG performance engines inside and out.
Ready to Buy?
Call us today to ask about availability, request a quote, or place an order. Let’s get your AMG back on the road or your build underway.
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