One problem related to engine knocking noise has been reported for the 2003 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Focus based on all problems reported for the 2003 Focus.
2003 Ford Focus, early morning squeaking, mid day, vibrating, late afternoon, car starts to shake excessively and as I drive into my driveway a really loud banging noise comes from the front of the car, so loud it scared me, I turned the car off and open the hood of the car and notice that the metal mounts that hold the engine broke in half and a piece was still on the motor. My engine was hanging from the left side, you could see it from the bottom of the vehicle. My insurance company comes out to check the damages and said in his 22 years of viewing vehicles for claims he's never seen anything like this. My mileage is 59,528, I'm still paying for this car, until 2012. This should not have happened to a six year old car with this little mileage. I called Ford to check if there was a recall on this situation. I was told no. I went on the internet to search for complaints regarding 2003 Ford Focus, found many complaints of many things wrong with this vehicle and several regarding the vibrating of the front of the vehicle relating to motor mount problems. I had the vehicle towed to a repair shop and was told that this incident created a problem with the axel as well. This is going to cost me a lot of money. Waiting for an estimate of repairs on 5/9/09.