I am going to replace the splash shields on our CX-5 (rear front KD5356110B adn front front KD535611YA). I can get the OEM Mazda ones for about $170. Amazon sells some non-oem ones for about $100 total. They say they are made my Diften, who I have never heard of.

Any thoughts on these? Tbey are plastic parts under the engine / radiator and I am worried that cheap ones may sag.