sorry to differ, but KBB does list the option if I priced the '08 135i
Optional
Sport Pkg
Parking Sensors Xenon Headlamps
Premium Pkg Premium Wheels BMW Assist
Navigation System Dual Power Seats
Bluetooth Wireless Cold Weather Pkg
all told a 08 with all the bells and whistles comes to (with 6800mls)
43860 or 43395 without sensors - retail
40160 or 39695 without sensors - private party
KBB is giving a value of 465 at retail and private party.
What doesn't jive is they only cost 350 USD, so I think they are pricing them as front and rear sensors vs just rear.
for me they add value in function, safety, and at resale
