Is this not possible equiptment wise, or are we just without a working xgauge for it? It works on the R56 but is this because those models have something we dont?

 

It won't work on the R53 because it uses a narrow band O2 sensor The R56 uses a wide band sensor, which is what a AFR gauge needs. Was also told you just cant change out to a wideband and then read it on a SC, still goes thru the computer. Now you can install a wideband and then use a wideband gauge and it will work