It is not uncommon one or both of the exhaust manifolds to crack resulting in an exhaust leak. Symptoms will begin as a ticking type noise noted on acceleration when the engine is cold.
2005 Infiniti QX56 Problem Reports
Most Reported 2005 Infiniti QX56 Problem Reports
The rear power door may not open or close properly, or make a grinding noise from inside the rear trim panel. If this occurs our technicians recommend to check for loose or damaged hardware at the rear door motor. Replace damaged hardware as required and use bolt retaining compound when reassembling the door motor hardware.
The fuel gauge may be slow to register, fail to read full when the gas tank is actually full, or read inaccurately. Our technicians tell us there is a redesigned fuel tank sender unit to remedy this problem.
An abnormal noise may develop from the timing chain area, Our technicians tell us it may be necessary to replace the variable valve timing camshaft shaft sprockets to correct this concern.
A clunking or popping noise may develop when driving over pot holes or rough roads, the front coil springs may be the source of the noise. Our technicians tell us updated parts are available to address this problem.
The anti-lock brake system (ABS) and/or brake warning light may illuminate, this may or may not be associated with a brake pedal pulsation. If a trouble code C1179 is stored, reprogramming the ABS system may be necessary to correct this concern.
The airbag (SRS) light may illuminate with code B1177 and/or B1182, related to the front seat belt pre-tensioners. Our technicians tell us revised front seat belt buckles are available to correct this concern.
The Check Engine Light may illuminate with controller area network (CAN) fault codes stored. Our technicians tell us that cleaning the electrical ground connections around the powertrain control module (PCM) to allow better electrical conductivity should help with this concern.
These electric fans in front of the radiator come on with the A/C compressor, and develop loud rattling noises with age, maybe from bad bearings. Some early ones were replaced under a campaign but my 2005 was not. I finally unplugged it until I could replace it. It is pricey at the dealer because the whole front bumper painted cover and steel bumper underneath have to come off to get the fan out.
White powdery spray pattern across the top plastic cover on the engine indicates a leaking radiator cap, a common problem. My 2005 did it for a couple of years with no significant drop in the coolant level until I realized what it was. I always mistook it for salt or dirt spray under the hood. A new $14 radiator cap from the dealer fixed this. NAPA, Autozone and Advance Auto did not have one. The rubber seal in the cap hardens over time and wo...