The Nissan Altima and Sentra are among the most popular daily-driver sedans on the road. Their 2.0L and 2.5L engines are engineered for longevity — and quality spark plugs are a key part of achieving that.
2.5L QR25DE (Older Altima)
The 2.5L naturally aspirated four-cylinder in the 2002–2018 Altima uses NGK Laser Iridium plugs as OEM spec. The QR25 is a proven engine that rewards consistent maintenance. Service interval: 60,000 miles with iridium.
2.5L KR20DDET (2019+ Altima with VC-Turbo)
The innovative variable-compression turbocharged 2.5L engine in the 2019+ Altima is one of the most sophisticated four-cylinders ever produced. It uses NGK iridium plugs spec'd for its unusual combustion characteristics — stick strictly with OEM specification on this advanced engine.
2.0L Sentra (2020+)
The current Sentra's 2.0L MR20DD uses NGK Laser Iridium plugs. This engine is smooth and efficient with proper maintenance. Service interval: 60,000 miles.
Older Sentra (1.8L QG18DE)
The 1.8L Sentra engine uses NGK Iridium IX or NGK Laser Iridium depending on the specific year. These small-displacement engines benefit greatly from quality iridium for smooth idle and efficient combustion.
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