if your car under warranty, then should not send to outside service center. it will void the warranty.
by the way, my mileage up to 36,000++
Engine tuning is consult II, will plug just below your steering wheel.
I think this was RM70 the last time i did it.
Through this they can change the idling, see temperatures on the different sensors, change the advance ignition timing.
Save fuel here's how!

) hahaha:
- Add a few NISMO stickers to your car
- Dump in a SR20VE into the sentra
- Put big bodykits to your car + a high GT wing
- stunning 19" heavy rims.
- Change all your glass to bulletproof
- use OVERsized piping and exhaust mod
irritating things about the sentra , i think most of you (n16) have:
- Bird chirping in the engine on cold weather,morning
- 2 dub dub sound at the back suspension when go over bumps.