Sunny). Production shifted from Smyrna, Tennessee to Aguascalientes, Mexico, and the Smyrna production line was retooled to build the Nissan Xterra. The 2000–2001 Sentra SE with the SR20DE roller rocker motor, which has and of torque, occupied the top-of-the-line Sentra until the SE-R returned for model year 2002. The 1.6-litre GA16DE engine was dropped in favor of the 1.8 L QG18DE (1769 cc), rated at and . In Brazil, this engine generated at 5,600 rpm and at 4,400 rpm. Numerous upgrades were made over the previous generation. The new model featured a new interior with higher quality plastics and more comfortable seats. The exterior was also substantially updated and now featured body-side moldings and clear headlights. The curb weight on the QG18DE-engined Sentra is . With the introduction of the B15 in year 2000, Nissan also introduced a CA 'Clean Air' trim only available in California. The CA trim boasts a double walled exhaust, three catalytic converters, quick catalyst warm up, and a radiator that has a special coating which actually changes ground level ozone (smog) into oxygen. The Sentra CA model is the only gasoline-fueled vehicle in the world to receive California Air Resources Board (CARB) super ultra low emission vehicle (SULEV) certification and obtain zero-emission credits. In markets where the B15 Sentra or Sunny was not sold, Nissan usually sold a similar car called the Nissan Bluebird Sylphy (G10/N16) in Japan but under other names elsewhere. In Europe, the Bluebird Sylphy was known as the Nissan Almera (N16) and Australia and New Zealand as the Nissan Pulsar (N16). The G10/N16 is constructed on the same platform as the B15 and features the same interior and engines. SE-R In 2001 for the 2002-2003 model year, a new SE-R was introduced powered by the 2.5-liter QR25DE and 4-cylinder. The SE-R came with either a 5-speed RS5F51A manual transmission or an optional 4-speed automatic. The 5-speed manual was dropped in 2003+ models, which consequently made the only available transmission such as a 4-speed automatic. A more aggressive front fascia was added thanks to a Nissan Skyline inspired front bumper for 2002 models. Black housing headlights, fog-lights, side skirts, a rear spoiler, a dual-tip muffler, and 16" aluminum-alloy wheels were also standard. This trim also featured a sport-tuned suspension, leather-wrapped steering wheel, and beige sport seat cloth. SE-R Spec V The Nissan Sentra SE-R Spec V was the more performance oriented sport