I've always own Jeeps from CJs, TJS and now JKS including a several Cherokees. All of them in various trim levels. From stock to modified. I've broken a few but all have been strong and reliable. The ones that broke was due to my exceeding the design parameters. My latest purchase is the 2016 Wrangler Unlimited Rubicon and I love the extra room it affords. Best on road driver, for a Jeep, I have ever owned.

I finally got around to trying this device.The vehicle I tested it on is my 2000 Tundra,I have never completely changed the brake fluid but have added some over the years.The tester green light came on as described but never changed while only the probes were submerged in the master cylinder brake fluid.Tried this several times with the same results.Just for the heck of it I put the unit probes in some water , green all the time.I don't know if this unit is broken or what but it did not work for me.