2015-2021 Jeep Renegade Brake Rotor Minimum Thickness and When to Replace

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 2015-2021 Jeep Renegade with the 305 mm front and 278 mm rear rotor package, a new front rotor is 28 mm thick and should be replaced at 26 mm; a new rear rotor is 12 mm thick and should be replaced at 10 mm, per Brembo's catalog specs for these discs. The front rotor only gives you about 2 mm of total wear, so the real rule is simple: measure at every pad change, and if any reading is at or below the number stamped MIN TH on the rotor, replace the rotors as a pair.

Renegade Rotor Sizes and Minimum Thickness

The Renegade uses disc brakes at all four corners. Brembo catalogs the Renegade (BU) with a 305 mm vented front disc and a 278 mm solid rear disc, and those are the sizes most Renegade owners will find on the vehicle. Here are the published dimensions for the Brembo replacement discs in those sizes:

Two cautions. First, the number cast or stamped on the rotor you actually have always wins. If your Renegade has had brakes swapped or you have a rotor from a different supplier, read the marking rather than trusting a chart. Second, do not mix up front and rear: the rear disc is less than half the thickness of the front, and its 10 mm limit is not a typo.

Where to Find MIN TH and How to Measure It

Brembo's guidance is that every rotor carries its minimum thickness as "MIN TH" followed by a value in millimeters. Power Stop notes the marking can be on the outer edge of the rotor, inside the cooling vanes, or on the hat (the raised center section the wheel bolts against). The wheel has to come off to see it, and on the front rotor you may need a flashlight to read it past the caliper bracket.

To measure correctly:

1. Remove the wheel and clean the rotor face with brake cleaner so rust and pad dust do not throw off the reading.
2. Use an outside micrometer or a rotor caliper. A standard sliding caliper will ride on the rust lip at the outer edge and read thick, so measure inside the swept area where the pads actually contact.
3. Take readings at several points around the rotor. Brembo says at least four; Power Stop recommends at least six, starting about a quarter inch in from the edge.
4. Use the lowest reading. If it is at or under MIN TH, the rotor is done.
5. Compare the readings to each other. Power Stop says thickness should not vary by more than 0.001 in (0.025 mm); a spread over 0.006 in (0.15 mm) points to disc thickness variation that may need replacement.

Minimum thickness is also the floor for machining. Turning a rotor removes material from both faces, so a front Renegade rotor that already reads close to 26 mm cannot be resurfaced and still stay in spec. With only 2 mm of wear available new, most Renegade front rotors are replaced rather than machined once they have been through a set of pads.

Why the Limit Matters

Minimum thickness is not an arbitrary number. A thinner rotor holds less heat, so it gets hotter faster on a long downhill or in stop-and-go traffic, and an overheated rotor is the start of fade, glazed pads and heat cracks. Brembo lists thermal cracks on the braking surface and longer pedal travel among the effects of an overworn disc. The caliper pistons also have to travel farther to clamp a thin rotor with thin pads, which is part of why the pedal can feel lower.

On the vented front rotor there is a second reason: the two friction faces sit on either side of the cooling vanes. Wear those faces too far and the rotor loses mass and strength right where it needs them.

Symptoms That Your Renegade Rotors Need Replacing

Measuring is the definitive check, but these signs usually show up first:

• Pulsing pedal or steering shake when braking. Power Stop ties a pulsing pedal mainly to disc thickness variation, where the pads grab thick and thin sections of an unevenly worn rotor. Side-to-side wobble (lateral runout) feels similar and eventually wears the rotor unevenly.
• A raised lip at the outer edge. A big ridge where the pad does not reach means the swept area has worn down a long way.
• Deep grooves or scoring. Usually from pads worn to the backing plate or debris trapped between pad and rotor.
• Blue or dark heat spots and fine cracks. Signs the rotor has been overheated.
• Grinding or squealing. Often the pad wear indicator or metal-to-metal contact, which can take a rotor below minimum quickly.
• Longer stops or a lower pedal. Worth a full brake inspection, including fluid level and the calipers.

Not every vibration is the rotors. Power Stop points out that pad material deposits and worn suspension bushings can feel similar, so check the pads for smearing and look at the front end if new rotors do not cure it.

What to Replace Together

Rotors are always replaced in axle pairs. Brembo says to replace both sides even when only one is below the limit, and Power Stop adds that uneven thickness side to side can make the vehicle pull. Fit new brake pads with new rotors; putting old, glazed pads on a fresh rotor transfers the old wear pattern and shortens the life of both. For a daily-driven Renegade, ceramic brake pads are a good match for low dust and quiet operation, such as these 2015-2021 Jeep Renegade front ceramic brake pads.

While the wheels are off:

• Replace the pad abutment clips and lubricate the caliper slide pins, or use a brake hardware kit. Sticky slides are a common reason one pad wears faster than the other.
• Clean all rust off the hub face before the new rotor goes on. Rust trapped under the hat creates runout and a pulsing pedal a few thousand miles later.
• Look at the caliper boots and brake hoses for tears, leaks or swelling, and replace a sticking caliper with a new or remanufactured brake caliper.
• Check the brake fluid level and condition, and flush it if it is due under the schedule in your owner's manual.

If you are buying rotors, our brake rotors collection lets you match by vehicle. Confirm the diameter (305 mm front, 278 mm rear on the common package) against your old rotor before you order.

Recall Check: 2020 Rear Calipers

NHTSA campaign 19V909000 covers certain 2020 Jeep Renegade and Fiat 500X vehicles whose right rear brake caliper may have been fractured during casting. A cracked caliper can fail and reduce braking performance. Dealers inspect and replace the right rear caliper as needed, free of charge. If you own a 2020 Renegade, run your VIN at nhtsa.gov before doing rear brake work so the dealer can handle the caliper if the recall applies.

How Hard Is a Renegade Rotor Job?

For someone who has done brakes before, rotors on a Renegade are a moderate job: the caliper and its bracket come off, the rotor comes off the hub, and everything goes back with the bracket and caliper bolts torqued to the value in the factory service manual. Torque the lug nuts evenly in a star pattern with a torque wrench rather than an impact gun; Power Stop lists improper lug torque and dirty mating surfaces among the causes of the uneven wear behind pedal pulsation. At the rear, check the factory service information for any parking brake procedure needed before the caliper pistons are retracted. After the job, bed in the new pads and rotors following the pad maker's break-in procedure.

Frequently Asked Questions

What is the minimum thickness of a Jeep Renegade front rotor?

On the 305 mm front rotor, Brembo's spec is 28 mm new and 26 mm minimum. Always confirm against the MIN TH marking on your own rotor.

What is the minimum thickness of a Jeep Renegade rear rotor?

The 278 mm solid rear rotor is 12 mm new with a 10 mm minimum, per Brembo's catalog data.

Can I resurface Renegade rotors instead of replacing them?

Only if they will still be above minimum thickness after machining. With just 2 mm of wear available on the front rotor, a worn rotor rarely has enough material left, so replacement is usually the better choice.

Do I have to replace both rotors if only one is below minimum?

Yes. Rotors are replaced in pairs on the same axle so both sides brake evenly and the vehicle does not pull.

How often should Renegade rotors be checked?

Measure them every time the pads are replaced. Power Stop suggests a brake inspection roughly every 10,000 miles, and Brembo's general rule is to replace rotors at every other pad change.

Sources

1. Brembo Parts catalogue - Jeep Renegade (BU) - 305 mm vented front and 278 mm solid rear disc sizes
2. Brembo disc 09.D209.11 - front disc 305 mm, 28 mm thick, 26 mm minimum, vented, 5 holes
3. Brembo disc 08.9364.21 - rear disc 278 mm, 12 mm thick, 10 mm minimum, solid
4. Brembo - Minimum brake rotor thickness - MIN TH marking, measure at 4 points, replace both sides, effects of an overworn disc
5. Power Stop - How to tell if you need new brake rotors - marking locations, micrometer measurement, warning signs, replace in pairs
6. Power Stop - Why do I have a pulsing brake pedal? - DTV and runout, 6-point measurement, 0.001 in and 0.006 in thresholds
7. NHTSA recalls - 2020 Jeep Renegade - campaign 19V909000 right rear caliper