Manifold/header/muffler/tail Pipe Problems of Infiniti QX56

My 2006 Infiniti Qx56 driver side manifold has cracked 4 times in 6 months. Each time it has cracked I was just driving normal road conditions. I have fixed it 4 times and am curious if this has anything to do with a prior recall on the arm suspension.

See all problems of the 2006 Infiniti QX56 🔎.

Emergency brake: e-brake appears to engage on its own and the brake light indicator comes on. There's also a grinding sound when brake is pressed. Grinding sounds only occurs when this issue comes up. Exhaust manifolds: was notified by the dealer upon a service inspection that there was a small crack in the exhaust manifolds. Is this a normal thing? and should this be a recall item as it could throw off any smog check testing. In addition how about the exhaust in the cabin issue? maybe they used too thin of a metal for the manifolds.

See all problems of the 2004 Infiniti QX56 🔎.

The contact owns a 2004 Infiniti Qx56. The contact stated that exhaust fumes were emitted into the vehicle. The vehicle was taken to the dealer where the technician diagnosed that the exhaust manifold was cracked and needed to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure and current mileage was 130,000.

The contact owns a 2008 Infiniti Qx56. The contact stated that while parked, he noticed a ticking sound. The vehicle was taken to the dealer for diagnosis. The technician stated that the engine manifold was fractured and would have to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure mileage was 80,000.

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The exhaust manifolds are defective which creates noise and allows fumes to escape. Infiniti admits they are defective but they want $2,800 to $4,000 to replace them. This should be considered a safety hazard and Infiniti should replace them free of charge.