Vehicle began shaking upon starting and was not accelerating properly. Engine light came on and a warning appeared on the LED screen to take care to dealer immediately. Upon inspection by the dealer, the problem was determined to be a faulty fuel injector (on Thursday 3/20). The part is NOT kept in stock at the dealer and was ordered from the warehouse for delivery the next day (Friday 3/21). I should have had the car repaired and returned to me by end of day 3/21 or next day, Saturday 3/22. I called after not receiving an update on Friday and was told the part is on BACKORDER. When the problem was diagnosed on 3/20, at the Hyundai dealer service department, the employee in the service department admitted that this was a common problem with the Tuscon and that no recall had been issued. He also said that the car is NOT DRIVABLE until the issue is fixed. A quick Google search showed that is very much a serious and common issue. I also appears that once one gs out, the rest will start to need to be replaced and are being done AS THEY BREAK, rather than replacing them all and/or fixing what is causing them to be faulty. I was told they have no idea when the parts will be ready. It clearly is a common problem if they do not have the parts readily available to fix my vehicle. In addition, he added it may take up to several weeks. The car just turned 3 years old and has 34,000 miles on it. I have NEVER had such a bad issue with any new care I have owned. There was absolutely no indication anything was wrong on prior drives before starting up the car. I had just driven it 260 miles to my daughter’s college and back. Thank goodness it didn’t happen on the busy highway or on one of the country roads in the middle of cornfields. The dealer service employee said the broken part would be ‘sent for inspection’ once they have it off and a new part available.