I assume you are asking about professional cleaning. Unless you have an injector that is giving you a problem the answer is no. Modern gasolines contain a cleaner to help keep injectors clean. Replace the fuel filter every 36,000 miles. Once a year pour one can of a good fuel injector cleaner in a full tank of fuel. A cleaner such as Seafoam, Techron, or similar product is just good insurance. Avoid the cheap cleaners that you buy for under $2 as they are for the most part worthless.
which injector you looking for? there are 8 injectors in that engine
2003 Saturn Ion clunking when breaking
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Saturn Ion was created in 2003.
Saturn was not discoved in 2003. Saturn has been known since ancient times. However, the Cassini and Huygens probe reached Saturn in 2004.
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2003 Saturn L200 holds 15 gal. of gas.
6", http://www.sonicelectronix.com/saturn-vue-2003-car-speakers.html