Are you sure it is not the transmission pump or torque converter
No one can guess at noises-need to have the vehicle to check
that out
Have a dealer weigh in- IF- it is still in warranty
When you say loud & the vehicle is only 3 to 4 years old
I would stop using it in a hurry until that issue is solved
SOURCE: loud whining noise sometimes after driving for a
Not really expensive just messy to repair. Return lines (low pressure) are much more common and they travel along the frame rail on the right side of the subframe from the power steering rack to the cooler line in front of the radiator. The high pressure line starts at the pump and travels over the top of the motor to the back side (it's a thick line with a big banjo bolt at the pump). They go too but less frequently.
If it's the return line and not the pressure line you can cut it and put some rubber hose from the parts store over the cut part with a couple clamps and that'll hold you for quite a while till you can get the line and get it installed.
The return line, done correctly, can be a bit of a bear on the ground but it's fairly quick in the air on a lift at a garage. The pressure line isn't too bad and can be undertaken by the home mechanic.
SOURCE: 2008 santa fe front noise
Is it a "wine" noise that gets louder when you rev it up? Sounds like an idler pulley. Is it a 3.3L motor?
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