This bulletin applies to 2013-2015 Nissan Altima sedan vehicles equipped with a QR25DE four-cylinder engine. A “boom” or drone sensation may be heard in the cabin area and/or vibration might be felt in the floor and/or steering wheel when driving and the engine is at about 1,800 RPM.
Check the gap between the rubber and metal portions of the front tube exhaust hanger. If less than 1mm of gap is found, add shims (flat washers) between the front suspension cross member and the front exhaust tube hanger. Maximum shim thickness should be 4.6mm (0.18 inch).
The minimum gap should be 1.0mm between the rubber and metal portions of the hanger.
If needed, add washer shims between the hanger and cross member. Shim total thickness should not exceed 4.6mm.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
