The 2007-2008 Nissan Altimas are now investigated by the National Highway Traffic Administration (NHTSA), a safety agency of the Executive Branch of the U.S. Government. The investigation was started on the 23rd of May, 2011. 20 consumer complaints, received by the Office of Defects Investigation (ODI), became the ground to start the probe. 18 out of 20 Altima's owners reported about the illuminated dashboard warning light, that informed the driver about the low level of brake fluid in the brake master cylinder. The remaining two reports stated about the reduction in the brake effectiveness. 16 out of 20 complaints were received in October, 2010. According to the preliminary estimation about 440,000 of the 2007-2008 Nissan Altima models may be affected. Those drivers, who brought their vehicles to the Nissan Dealer, informed the ODI that there was a leakage in the brake master cylinder. Several other drivers mentioned that brake fluid was leaking into the brake booster assembly. This leakage in its turn makes the brake warning light stay on. According to the NHTSA, none of the received complaints contained the information about injuries or crashes, caused by the investigated problem.
It is the second investigation for Nissan vehicles from 2007 and 2008 model years. Last time it was Nissan Sentra of the same model years with the same problem. The report, made by the NHTSA after finalizing the investigation, stated, that the recall should be ordered. As for the Nissan Altimas, the probe, opened by the NHTSA in May, is just the investigation. The final report will state whether the recall is found to be necessary.