The contact owns a 2016 Ford F-150. The contact stated while driving from a complete stop, the vehicle made an abnormally loud sound. The vehicle was taken to the dealer, where it was diagnosed that the exhaust manifold was leaking and needed to be replaced. The vehicle was repaired; however, the failure reoccurred a year later. The vehicle was taken back to the dealer, where the same assessment was made, and the exhaust manifold was replaced; however, the failure persisted. The vehicle was taken back to the dealer, where it was diagnosed that the exhaust manifold needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 60,000.

- San Diego, CA, USA

The contact owns a 2016 Ford F-150. The contact stated that the vehicle was taken to the dealer for a service appointment. The contact was informed by the dealer that he had heard an unusual whistling sound coming from the engine compartment. The vehicle was diagnosed with a warped manifold and fractured studs on each side of the manifold. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 48,000.

- Montpelier, VA, USA

The contact owns a 2016 Ford F-150. The contact stated that while driving at an undisclosed speed and attempting to accelerate, the vehicle started to vibrate and lost motive power. The contact was able to continue operating the vehicle however, the vehicle was unable to exceed 50 MPH. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the intake manifold. The contact was informed that the intake manifold needed to be replaced. The vehicle was not repaired due to parts not being available. The manufacturer was notified of the failure, and a case was filed. The failure mileage was 125,000.

- Wendell, NC, USA

The contact owns a 2016 Ford F-150. The contact stated that the vehicle would shutoff while at a complete stop. The contact stated that the failure occurred intermittently, causing the contact to depress the brake pedal and the accelerator pedal simultaneously to prevent the failure from occurring while at a complete stop. Additionally, the contact stated that while driving at various speeds, the vehicle hesitated to respond while depressing the accelerator pedal. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed that the intake manifold had failed and needed to be replaced; however, the part was not available for the repair. The vehicle was not repaired. The local dealer was contacted and informed the contact that the parts were on backorder. The manufacturer was not notified of the failure. The failure mileage was approximately 80,000.

- Mountain Home, AR, USA

My truck started making a whistle and ticking sound different than the standard turbo whistle. I've also noticed a burning smell recently when accelerating. I took the vehicle in to the dealership, and they pointed out that the exhaust manifold is warped. Looking online, this is a standard issue with Ford's Ecoboost engine -- however this is not covered by the extended warranty. This could cause the vehicle to fail emissions testing

- Eagle Mountain, UT, USA

After doing extensive research on the 2016 3.5L F150 eco-boost exhaust manifold failure, it seems that this is a very common issue. Especially when both sides are warped, it lends to the consideration that a design flaw involving a restriction of the front cylinders increases pressure to the point of failure.

- Sandy, UT, USA

Exhaust manifold studs broke causing the manifold to warp turning into an exhaust leak. This is a common issue with the 3.5 eco boost due to the lack of manifold studs towards the rear of the vehicle. This is a design flaw that is costing the average person approximately $1400. There are thousands of post and videos with this issue.

- Wallops Island , VA, USA