My Tucson is 2.0L GLS 2WD 6A/T Theta II. Had front and rear brake pads replaced this morning. Went to Seiring for the brake pads, brought the sample with me. They gave:
Front brake pads = 58101-1DA00
Rear brake pads = 58302-2SA00

Both in Hyundai blue box with hologram sticker.

BUT, based on my experience, when i inquired by phone, they gave me 58101-2SA00 for my front brake pads. This one is smaller when you compare to 58101-1DA00.

In short, part numbers are very confusing. I HOPE Hyundai dealerships will be kind enough to share to Hyundai car owners part numbers.