Hyundai Santa Fe Problems

IF POSSIBLE, find the original master key so you can program your new one. If you can't,, if you lose the key you'll have to buy a full set of new keys and locks, including the boot and ignition locks, and replace the immobiliser. This costs about $1000 plus fitting. Hyundai has dropped this system because of such problems.

MOST vehicles have a diff whine, it's the nature of the type of gears used in diffs, but you rarely hear it. Most car makers manage to isolate the noise so it doesn't travel through the car. They use all sorts of techniques to ensure it doesn't become a problem. The problem with the Santa Fe could lie in the diff itself, it could also lie in the suspension or body which can act as amplifiers. I would take up Hyundai's offer and have them fix the problem.