Hey, if your Jeep Compass (2007-2018), Patriot (2007-2017), or Dodge Caliber (2007-2012) needs a new brake master cylinder, this KAX M630515 is a solid pick. It's a brand new part—not a remanufactured one—so you're getting fresh materials for better reliability and safety. It's made from aluminum, just like the original, with a bore diameter of 0.813 inches and two outlets (the rear one is M12 x 1.0 thread). It doesn't come with a reservoir or sensor, so make sure you're okay with that. This part directly replaces OEM numbers like 5175093AA and 5175093AB. Always double-check the fit using the 'Amazon Confirmed Fit' tool at the top of the page, and read any notes if there's a blue 'i' icon. Installing it should be straightforward if you're handy, but if not, maybe get a pro to help. Brakes are important, so it's good to use a quality part like this one.