This code was noted as 'BANK 1 CATALYST EFFICIENCY'. My local Lexus
> specialist quoted me $2610.08 for front bank 1 and rear catalytic
> converters. If the code refers to bank 1 why would I have to replace the
> rear converter? Does this seem like a fair quote?
>
> 2002 Lexus GS300.
>How can does this part fail on a 5 year old car BTW.