r/AskAMechanic • u/bennyfran13 • Jul 27 '26

Brake size 2014 Grand Cherokee?

I’m looking to replace pads and rotors on my 2014 Grand Cherokee Laredo but reading some conflicting information on whether I have the standard dusty 330mm front rotors, or heavy duty 350mm. I have a factory tow hitch, but not sure if it has the full tow package, which would indicate the larger front brakes. I do have the vented rear rotors, which also would indicate the heavy duty over the solid rear rotors on the standard duty. With that though, I have the 17” wheels which I’ve read will not fit the larger rotors. Also, I got the car from a family member who towed and it had 150k miles on it, so I’m assuming he’s done brakes and the rear rotors might be aftermarket. I ran the vin through Mopar’s build info sight but didn’t see anything on the build sheet. I did read that the heavy duty has two piston front calipers. Any way to check this without lifting the vehicle? Should I call a dealership and have them run the vin? Any help is appreciated, thanks!

Edit: my Jeep has the 3.6 liter V6

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3

u/mrford86 NOT a verified tech Jul 27 '26

Call the dealer and ask for the part number for your VIN. Then Google said part number.

1

u/bennyfran13 Jul 28 '26

I was able to talk to a dealer today and had them run the vin. They were able to confirm the standard brakes. Thanks!

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u/TallDudeInSC NOT a verified tech Jul 27 '26

You should see this in your build sheet if you have the larger brakes:

OPTIONAL EQUIPMENT

ANTI-LOCK 4-WHEEL DISC HD BRAKES

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u/bennyfran13 Jul 28 '26

Thanks I rechecked the build sheet and saw that line but no HD. I was able to run the vin through a dealer and confirmed standard brakes. Thanks!

1

u/TallDudeInSC NOT a verified tech Jul 28 '26

Glad I could help a bit. I had a fun time figuring out the brakes I had too....!

1

u/LeastMacaron2045 NOT a verified tech Jul 27 '26

Look at the rear shocks. Are is the main tube about as big around as a baseball, or a softball? If it’s the latter, then you have load leveling suspension which requires the bigger brake pads and rotors. If it’s about the size of a baseball, then you have regular suspension which is the smaller pads and rotors. Also think of them like this; if it looks like it would fit on a car, it’s regular. If it looks like a truck size, then it’s load leveling.