Was driving to martinez and heard a slight clicking sound by the time we exited freeway at martinez exit the sound became very loud. When we stopped at light car died and wouldn't restart. Had car towed to wheel works and the told us that the engine had oil everywhere and no oil in the engine. The mechanic discovered a hole in the back part of the engine. Mechanics can't figure out why or how it happened. It sounds like to me that there was a mechanical defect in the engine.

- Fairfield, CA, USA

Driving approximately 50 mph when I heard pop. Smoke came from under hood. Pulled over. Popped hood. Smoke coming from engine. Checked dipstick and no oil. Never had oil leak. No oil light ever came on. No check engine light. No overheat or hot engine light. Just a small fire underneath the engine on ground. Bought oil that just leaked immediately after putting in. No warning. No signals. No alerts. Blown engine. They want $5300 for a used engine.

- Tampa, FL, USA

The contact owns a 2008 Hyundai Sonata. The contact stated that while driving 20 mph, the vehicle began to make a loud ticking noise. The vehicle was taken to an independent mechanic. The technician diagnosed that the engine needed to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 108,000 and the current mileage was 108,112.

- Duquesne, PA, USA

Oil light never came on, however no oil was in vehicle, took to southern auto mart in georgetown, SC they said it was okay, they changed my oil. Two weeks later no oil, engine is no good.

- Andrews, SC, USA

I was driving my car and, according to my mechanic, the crank rod came loose. I bought this vehicle used so the Hyundai 100,000 mile warranty will not cover it. I have done routine oil changes and up to this point had no real problem with the vehicle. It is disappointing to say the least as I have had this vehicle for about four years and purchased it based on the idea that Hyundai's are supposed to be reliable vehicles. I had hoped that Hyundai would have done something to help remedy the situation but at this point they have not, which is also disappointing. In the future I will not be purchasing a Hyundai.

- Albuquerque, NM, USA

Oil leaking down from timing cover onto alternator and down to oil pan found during routine oil change. Took to one dealer, was told no leak. Took back to my mechanic, took pictures, took to another dealer and was repaired. Found timing cover leaking, remove timing cover, V/C gaskets and pump gaskets.

- Surprise, AZ, USA

Driving on I-94 in battle creek, mi, the 2008 Sonata, after making a ticking noise for a year (which the dealership would not look at) began to make a grinding noise and something flew out of the engine and smoke came pouring out of the vents. I pulled to the shoulder on this busy interstate and called roadside assistance from Hyundai. They sent a wrecker, and when the car was lifted, all of the oil was on the road. They towed it to the nearest dealer 30 miles away in kalamazoo, mi and they told me that a rod and piston had flown out of the bottom of the engine of the car. After doing some research, there seems to be a problem with faulty crank rod cap bolts. The ticking I think was from the rod cap that had come off. As of now, they are not doing anything under warranty awaiting oil change receipts. Please force a recall soon, as this could be an extremely dangerous situation. Someone could have been killed by the flying piston. Luckily it flew off to the side of the road.

- Dearborn Heights, MI, USA