What's a banjo bolt anyway, you ask? Basically, it's a bolt that's, well, shaped like a banjo. Not all of them are shaped like that though; others are merely hollow and have one hole in the middle. The banjo bolt's hollow structure is what separates it from the regular variety of bolts. You see, the banjo bolt's unique design allows the passage of fluids through it. And for that reason, it's the
bolt of choice of hydraulic systems.
There are several automotive systems that require the use of banjo bolts. They're prominently used in brake systems to connect the brake caliper and the brake line while at the same time allowing the passage of brake fluid. Besides that, other applications of the banjo bolt include the power steering system, fuel filter connectors, and hydraulic clutches.
While a banjo bolt may be small in size, its importance to the said systems isn't little by any means. In fact, it's one of the components that help in maintaining the efficient operation of those systems. Because the banjo bolt facilitates the flow of hydraulic fluids, it can get worn-out as well. And when it does get to that point, the bolt may become loose and cause leaks within the system. You'd need a replacement for it once that happens.
Getting a replacement for a banjo bolt isn't complicated at all. In fact, all you need to remember is to get a banjo bolt that's of the appropriate size. So before you purchase anything, measure the dimensions of your old banjo bolt. Use that as your guide in choosing a brand-new banjo bolt. Or to be completely sure, get a bolt that looks exactly like your old one.
As you probably expect, banjo bolts aren't expensive. In fact, they only cost around $10 each. With that, there's simply no excuse why you should put off the replacement of a worn-out banjo bolt.