What is the lifespan of an OM617 engine?
The OM617 was praised for its bulletproof reliability, often exceeding 500,000 miles with routine maintenance. It gained immense popularity in models such as the W123 300D and W126 300SD, particularly in North America, where cars with diesel engines were very scarce. Mercedes OM617 This engine is a straight 5 diesel, as you may already know, it is considered one of the most reliable engines ever made. It was common for one of these to reach over 1,000,000 miles without being rebuilt. As its regarded as both powerful and reliable, you can see why it’s a good choice for off-roading.
How much horsepower can an OM617 handle?
More realistically, the engine is good for about 150 with a well tuned and maxed out stock injection pump. Anything past that you’re getting into rarely treaded territory. Basic upgrades like a performance tuner, cold air intake, and upgraded exhaust can add 100+ HP. Mid-level modifications—such as a larger turbocharger, high-flow fuel injectors, and upgraded intercooler—can push the 600 HP range safely.