Infiniti L31 L35 2002-2006
Infiniti L31 Series
2.5 L (152-cubic-inch) QR25DE I4 175 hp (130 kW)
3.5 L (214-cubic-inch) VQ35DE V6 (240–250 Hp)
3.5 L (214-cubic-inch) VQ35DE V6 (260 Hp) SE-R
The 2002 2.5L Altima’s had major excessive oil consumption issues causing potential catastrophic engine failures. Some cases were because of owner neglect and other cases involved the catalytic converter failing, forcing foreign objects back in to the exhaust manifold. Most reports were received when the vehicle is beyond 100,000 miles and more than 8 years old (beyond any warranties) and most of the reports had only to do with the 2002–2003 model ranges. In April 2015 a class action lawsuit was filed in the Northern district of Illinois US on behalf of all Nissan Altima owners of 2002, 2003, 2004, 2005 and 2006 model years. The lawsuit is ongoing as of October 2015 and alleges that Nissan manufactured those model years with defective floorboards on both the driver and passenger side of the vehicle. The resulting premature rust was extensive and generally happened out of warranty. Nissan changed the design of the floorboards for the 4th generation and thus the problem did not reoccur again in models from 2007 onwards.