Nissan MR18DE 1.8L Engine.

Nissan MR18DE 1.8L Engine

Nissan MR18DE 1.8L engine is a compact yet powerful inline-four petrol engine engineered for reliability, fuel efficiency, and long-term performance. Produced between 2007 and 2012, this engine powered popular Nissan models such as the Tiida, Versa, Sentra, and Wingroad, offering a perfect balance of economy and everyday drivability.

Featuring an aluminum alloy cylinder block and head, DOHC 16-valve configuration, and sequential multi-point fuel injection, the MR18DE delivers smooth performance with a power output of around 126 hp (93 kW) and 174 Nm of torque.
It utilizes continuous variable valve timing (CVTC) on the intake side for optimized efficiency and improved throttle response across all RPM ranges.

This Nissan MR18DE engine is designed to minimize friction and enhance fuel economy while maintaining dependable torque for urban and highway driving.
Its lightweight construction ensures excellent heat dissipation, reducing engine wear and extending service life.
Regular maintenance—such as timely oil changes and use of quality lubricants—keeps this engine performing flawlessly well past 200,000 km. Ideal for both engine replacements and JDM import upgrades, this unit represents the trusted Nissan engineering that combines performance, economy, and longevity.

Common Weaknesses & Maintenance Notes

While the Nissan MR18DE 1.8L engine is known for its long lifespan and fuel efficiency, a few common wear points can appear over time—mostly due to neglected maintenance rather than design flaws.
One typical issue involves oil consumption as mileage increases, often caused by clogged piston rings or extended oil-change intervals. Regular use of high-quality synthetic 5W-30 oil and timely changes every 5,000–8,000 km can easily prevent this.
Another area to monitor is the timing chain tensioner, which may develop noise at higher mileage if oil pressure or lubrication quality declines. Unlike belt-driven systems, the MR18DE’s timing chain is built to last the life of the engine when properly maintained.

Some owners report rough idle or hesitation, which is commonly traced to dirty throttle bodies, MAF sensors, or carbon buildup in the intake system—issues easily solved with periodic cleaning and fuel system treatment.
The engine mounts and PCV valve may also require replacement around the 150,000 km mark to maintain smooth operation.
Overall, when maintained with genuine Nissan parts and proper servicing, the Nissan MR18DE 1.8L engine remains one of the most durable and efficient small-displacement engines in Nissan’s lineup.

All engines are thoroughly inspected and compression-tested before listing, ensuring no cracks, leaks, or internal damage.
Hand-picked and imported directly from Japan, each engine is removed from a running and driving vehicle with approximately 40,000–60,000 miles, guaranteeing premium quality and peace of mind.