Some 2007-08 Altima and Maxima sedans, as well as 2008 Altima coupes, may emit a rattle or clunk from the front suspension while being driven over rough road surfaces. According to Nissan, the problem only affects vehicles built between July 16, 2007 and Sept. 29, 2007, and is caused by improperly tightened front stabilizer bar connecting rod nuts.
Start the repair by getting the vehicle on a lift. Now loosen the two connecting rod nuts at both ends of the stabilizer bar. Using a backup wrench, retighten the outer nut to an updated torque value of 58 ft-lbs. When properly positioned, the ball joint head of the connecting rod should be parallel to the stabilizer bar, not twisted, as shown in the illustration above.
To complete the fix, lower the vehicle and road test to confirm that the noise has been eliminated.