Click & Clack are mostly concerned with chortling over their lame jokes, berating men, and demonstrating their smugness over drivers who don't agree with their Cambridge-centric methods. The percentage of time they give out truly useful advice is pretty low.
I've personally corrected them a few times about some info they gave out which was outright incorrect, only to have them repeat the bad info again during a later show. One was on the subject of electric trailer brakes (which I responded two twice, including functional diagrams both times) and how '80s BMW heater valves work (their answer included two bits of bad information -- that the thermostat housing and thermostat were one piece and that a cold heater is "always" a bad thermostat).
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