The 1999 Buick Park Avenue has a plastic plenum that fails while the vehicle is in motion unannounced, causing antifreeze to enter the engine compartment, locking the engine up. Consequently, there is a total power failure. Power steering and power brakes do not work, and the car has no power. Can't coast or anything else. Consumer has been in contact with Buick, but, there was no recall. Consumer considered this vehicle very unsafe. Car just stopped in the middle of the road. This was instantaneous, and with no prior problems. Consumer took the car to his mechanic, and they replaced the plenum from GM products.

- Katy, TX, USA

The intake manifold cover is made out of plastic, and has become defective for a second time. The antifreeze is going into the engine...........

- Princeton, IN, USA

Intake manifold leaked coolant fluid all over the engine. This resulted in the vehicle stalling while driving. The manifold was replaced, but the problem recurred. The dealership replaced the manifold with a redesigned one.

- Charles City, IA, USA

While driving the vehicle stalled and the check engine light illuminated. The vehicle was taken tot eh dealer where it was determined that the engine intake manifold had a design defect which caused premature gasket failure. That failure caused coolant to leak into the engine manifold and burn in the engine. The vehicles A/C compressor also failed.

- Ocala, FL, USA

The plastic intake manifold melted, and caused coolant to leak onto the engine. Scc

- Loves Park, IL, USA