hi all,

today while changing the trans filter, i have noticed that my cats don't have oxygen sensors installed (bypassed?) what i can see is there is a bolt installed on each (4pcs) pic attached. my X5 is 2001 4.4i full option with sport package and onwed it for almost 9mos now. is this something to worry about or should i enable them by putting O2 sensors?

thanks in advance.

cheers,
royemaun

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