There difference is that the Bosch sensors from amazon are the exact same part that came in the vehicle. The AB sensors are not. No one has complained about the Bosch sensors, people complain all the time about the AB sensors.... though I have one AB sensor in my 03.... no complaints from me so far.... but I didn't know about the great price at amazon on the OEM sensors at the time I bought it.

 

Thanks these answers are very helpful.

The scanner indicates low voltage on one of the downstream sensors. I'll probably buy just one sensor( probably from Amazon), and hope the warning light goes out.

Still have to address the 3 amigos. We are leaning toward a shuttle valve kit

 

Where are you located? Someone nearby might have a scanner capable of reading ABS codes.

 

My car is in Daytona Beach.

 

Just did all O2s in my 03....got Bosch sensors at O'rielly's autoparts. They will typically have them in stock or in a warehouse close by. Don't cut corners...get the Bosch! Bosch also come with plugs exact fit length.

 

If downstream is suppose to be my problem. Do I have to replace both (2) sensors or is it ok to replace only the defective sensor?

 

best to replace in pairs