Learn to replace the spark plugs in any car using the Toyota 1.8 liter 2ZZ-GE engine. Spark plugs are an important regular maintenance item, especially for engines like the 2ZZGE. They wear out over time, but can also be fouled very quickly depending on conditions inside you engine.

Changing plugs yourself is very easy, it's a good beginner's project. Saving an hour of dealership labor fees, you should be able to buy the tools for less then you'd pay someone else to do the work.

Lotus's official maintenance schedule for replacing the spark plugs is every 30k miles or 6 years. This seems very often for Iridium plugs that typically last a very long time. On the other end of the rage, Pontiac recommends you change these plugs at 120k miles.

There are no spark plug wires, this engine uses a coil on plug design that uses 4 ignition coils directly connected to the spark plug. As far as spark plug selection goes, forget experimenting with other brands, just get the ones listed below unless you know better. Avoid platinum plugs altogether for boosted applications.

The Toyota 2ZZ-GE engine used in a lot of different vehicles. This article shows a 2005 Lotus Elise, but this should apply to any model the 2ZZ is in, differing in minute details like different engine covers.

Vehicles that use the 2ZZ-GE (source: Wikipedia)