Because then I can tell you if it is involved in the recall. Most Sentra's this year are. The recall is shown below.
December 19, 2003
VOLUNTARY RECALL CAMPAIGN ENGINE SENSORS
CAMPAIGN I.D.#/NHTSA #:
R3022/03V-345 APPLIED VEHICLES:
2000-03 Sentra (B15)
2002 Altima (L31)
2002-03 Maxima (A33)
2003 Murano (Z50)
2003 350Z (Z33)
QG18DE, QR25DE, VQ35DE NOTE:
Use Service Comm. to confirm campaign eligibility.
Nissan has determined that some 2000-2003 model year Nissan vehicles may have a defect which relates to motor vehicle safety. The engine might stop running while being driven if the crank position sensor or cam position sensor fails. This may also result in the "Service Engine Soon" light coming on or reduced engine power. If the engine stops running while driving, this could result in a crash without warning.
Nissan has assigned identification number R3022 to this campaign. This number must appear on all communications and documentation of any nature dealing with this campaign.
NUMBER OF VEHICLES POTENTIALLY AFFECTED
The number of vehicles potentially affected is approximately 572,000.
It is the retailer's responsibility to check Service Comm for the campaign status on each vehicle falling within the range of this voluntary safety recall which for any reason enters the service department. This includes vehicles purchased from private parties or presented by transient (tourist) owners and vehicles in a dealer's inventory. Federal law requires that new vehicles in dealer inventory which are the subject of a safety recall must be corrected prior to sale. Failure to do so can result in civil penalties by the National Highway Traffic Safety Administration. While federal law applies only to new vehicles, Nissan strongly encourages dealers to correct any used vehicles in their inventory before they are retailed.