Regarding the quality of the aftermarket sensors compared to the OEMs I am not sure. Pero I'm sure that it really helps in very tight situations when you back up. I had a pair of sensors installed at the back of my Strada sa Banawe. Binutasan rear stainless steel bumper at salpak sila. It gave me more confidence when I back-up. It's a good aftermarket accessory to those who are always on the tight spots. :D