These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
When the Carrangers finally get around to acting like honest-to-god heroes, a certain theme starts playing: "Gekisou Accel Changer!" (specifically the second part, starting at 0:38).
Signalman and Sirender's theme song is surprisingly cool, especially during Sirender's first fight: Shirobai Yaro Signalman*
Shirobai = a motorcycle cop's bike, universally painted white in Japan
Victrailer Kyodai-naru Machine (Giant Machine VicTrailer) has a ludicrously heroic theme. Godzilla meets a goddamn force of justice, really.
Dakara Tatakau Carranger (Why Carranger Fights) plays while Red Racer mans (leaders?) up and steals back the stolen RV Robo.
Not just that, but the "car" theme was already used by Kousoku Sentai Turboranger, something that was referred to even back when Carranger first came out.
It's also similar to Blazing Saddles in that it's a comedy involving an army of thugs sent to clear out a small backwater to make way for the construction of a lucrative transport route.