2009-2020 Dodge Charger Brake Caliper Problems and Replacement

By Core Brake Parts Tech Team — Circleville, OH warehouse

Most brake caliper problems on a 2009-2020 Dodge Charger come down to three things: seized slide pins on the floating calipers, a sticking piston, or old fluid that has let corrosion build inside the bore. The symptoms are a pull to one side, one pad worn far thinner than its partner, a hot wheel after a drive, or a smell of burning brakes. The fix is usually a replacement caliper with new hardware and a bleed, and the most important step is identifying which of the Charger's several caliper designs your car actually has before you order anything.

Which Caliper Does Your Charger Have?

The Charger was sold with a wide spread of brake packages over this period, and they do not interchange. Brake & Front End's service article on the Charger, Challenger and Magnum notes that V6 cars use single-piston floating front calipers and that V8 cars step up to dual-piston front calipers, with Brembo four-piston calipers on performance trims. A caliper identification guide from 797 Performance breaks the later cars down the same way: single piston on V6 and lower-trim V8 cars, dual piston typically on R/T models, four piston typically on Scat Pack and SRT cars, and six-piston calipers on Hellcat and many Dynamics Package and Widebody cars.

Trim names and option packages shifted from year to year, so do not order by trim alone. The reliable check is to look through the wheel and count the pistons, and read the casting: the big fixed calipers carry the Brembo or SRT name on the body. Package matching matters on this car. NHTSA recall 19V758 covered certain 2019 Challenger and Charger cars that were built with an incompatible front wheel and brake package, which could let the front tire contact the steering knuckle. Wheel size and caliper size are engineered together here, so a bigger caliper swap needs wheels that clear it.

Common Charger Caliper Problems and Symptoms

Seized or binding slide pins (floating calipers)

The single- and dual-piston calipers float on two guide pins. When the pin grease hardens, a boot tears, or the pins corrode, the caliper can no longer center itself over the rotor. Brake & Front End lists bent or binding pins, worn slides, damaged brackets, swollen or hardened guide seals and lack of lubrication as the usual causes. What you notice:

• The inner pad worn to the backing plate while the outer pad still looks usable, or the reverse
• A tapered pad, thicker at one end than the other
• A slight pull under braking and reduced stopping performance
• Squeal or clunk as the caliper shifts in its bracket

Sticking piston

If the dust boot splits, water reaches the piston and the bore. The piston starts to hang up and does not retract after you release the pedal. The pads drag, the wheel runs hot, fuel economy drops and you may smell burning brakes after a drive. A sticking piston also overheats the rotor, which is why a dragging caliper often shows up alongside a new pulsation in the pedal.

Leaks at the piston seal or banjo bolt

Wet fluid on the inside of the wheel or tire, a falling reservoir level and a soft pedal point to a leak. The 2020 Charger owner's manual explains that the red brake warning light monitors fluid level in the master cylinder and comes on when the level drops below a set point, so a leaking caliper can trigger it. The manual is blunt that driving with the red brake light on is dangerous because part of the brake system may have failed.

Fixed-caliper issues on Brembo cars

Four- and six-piston fixed calipers have no slide pins, so pin binding is not their failure mode. Instead, watch for uneven wear between the inner and outer pad from a stuck piston on one side, seal leaks, and heat-related fluid breakdown on cars that see track days or hard mountain driving.

Why the Calipers Fail

• Old brake fluid. Brake fluid absorbs moisture over time. The owner's manual warns that fluid exposed to air takes on moisture and boils at a lower temperature, which can cause sudden brake failure under hard or prolonged braking. That same moisture corrodes caliper bores and pistons from the inside.
• Wrong grease on the pins. Petroleum grease swells rubber boots and seals. Brake & Front End recommends a high-temperature caliper lubricant on all sleeves, bushings, pins and sliding surfaces.
• Tools on phenolic pistons. Brake & Front End points out that the Charger's calipers, other than the SRT Brembo units, use phenolic pistons, and that no tool should contact the piston when you retract it. A chipped phenolic piston will leak or stick.
• Road salt and age. A car that sat through several winters on the original fluid and hardware is a prime candidate for seized pins and brackets.
• A collapsed brake hose. A hose that has broken down inside can hold pressure on the caliper, which looks exactly like a stuck piston. Check the hose before condemning the caliper.

How to Diagnose a Bad Caliper

1. After a normal drive, carefully compare the heat coming off each wheel. One wheel much hotter than its partner on the same axle points to that caliper dragging.
2. With the car safely supported, spin each wheel by hand. A healthy caliper lets the wheel turn with light drag; a seized one fights you.
3. Pull the pads and measure both. A large difference between the inner and outer pad on one caliper is a classic pin or piston problem.
4. Remove the guide pins and check that they slide freely, are straight and have intact boots.
5. Inspect the piston boot for tears and the caliper body for wet fluid.
6. Crack the bleeder briefly on a dragging caliper. If it suddenly releases, suspect the hose rather than the caliper.

Replacing a Charger Brake Caliper

For the single- and dual-piston floating calipers this is a moderate DIY job with basic hand tools. The fixed Brembo calipers bolt on in a similar way but are heavier and far more expensive, and many owners have them resealed rather than replaced.

• Buy the caliper that matches your existing piston count and rotor size. A caliper for a different package will not fit the bracket or the rotor.
• Retract pistons with a wood block or a proper tool that does not bear on the phenolic piston.
• Use new copper sealing washers on the banjo bolt and do not overtighten it; Brake & Front End warns that the banjo bolts are easy to strip.
• Clean the bracket, fit new abutment clips and grease the pins with high-temperature caliper lubricant.
• Torque the caliper bolts, bracket bolts and lug nuts to the values in the factory service manual for your car.
• Bleed the circuit you opened, and flush the whole system if the fluid is dark.

For fluid, the 2020 Charger owner's manual recommends Mopar DOT 3 meeting SAE J1703 in the brake master cylinder, and allows DOT 4 when DOT 3 is not available. It adds that DOT 4 must be changed every 24 months regardless of mileage. Never add DOT 5 silicone fluid to this system.

One more Charger-specific point: Brake & Front End explains that on R/T and SRT models the brake controller can apply light pressure to the calipers after a high-g maneuver to push the pads back into position, which prevents a long pedal on the next stop. The owner's manual also describes Rain Brake Support, which lightly applies the front brakes to wipe water off the rotors when the wipers are on. Both features rely on calipers that apply and release freely.

What to Replace at the Same Time

• Pads. Pads soaked in fluid or worn unevenly by a dragging caliper should always be replaced. Shop brake pads or ceramic brake pads for daily driving.
• Rotors. A caliper that dragged usually overheats the rotor. If the rotor is below minimum thickness, scored or causing pulsation, replace it. A matched front and rear rotor and pad kit for the 2009-2020 Charger covers both axles in one order.
• Calipers in pairs. Replace calipers across an axle so both sides clamp evenly. Browse brake calipers and Cardone remanufactured calipers.
• Hardware. Pins, boots and clips are inexpensive and they are what fails first on floating calipers. See brake hardware kits.
• Hoses. If a hose is cracked or you suspected it during diagnosis, replace it with the caliper. See brake hoses.

Frequently Asked Questions

How do I know if my Charger caliper is stuck or just the slide pins?

Remove the pins. If they are seized, dry or the boots are torn, the pins are the problem and a new hardware kit with proper lubricant may be enough. If the pins move freely but the piston will not retract, or the boot is torn and the piston is rusty, replace the caliper.

Can I put Brembo four-piston calipers on a V6 Charger?

It is not a simple bolt-on swap. The larger fixed calipers use different rotors and brackets and need wheels that clear them. Recall 19V758 shows how closely wheels and brakes are matched on this car; a mismatched package can cause clearance problems.

Do I need to replace both front calipers?

It is strongly recommended. A new caliper next to an old, partly seized one can cause a pull and uneven pad wear. Replace them as a pair on the same axle.

What brake fluid does a 2009-2020 Charger use?

The 2020 owner's manual calls for Mopar DOT 3 meeting SAE J1703, with DOT 4 acceptable if DOT 3 is not available. The correct type is also identified on the master cylinder reservoir. Check the manual for your model year.

Is it safe to drive with a dragging caliper?

Not for long. A dragging caliper overheats the pads, rotor and fluid, which can lead to fade and a longer stopping distance. If the red brake warning light is on, have the car checked right away.

Sources

1. Brake & Front End: Brake Job - Dodge Magnum, Challenger, Charger - caliper types by engine, phenolic pistons, banjo bolts, R/T and SRT pad knock-back function
2. 797 Performance: How to tell which front calipers you have - single, dual, four and six piston applications by trim
3. Brake & Front End: Bent or binding mounting pins on slider-style calipers - pin binding causes, symptoms and high-temperature caliper lubricant
4. 2020 Dodge Charger Owner's Manual (FCA US) - DOT 3 SAE J1703 fluid, DOT 4 24-month change, brake warning light, Rain Brake Support
5. NHTSA recalls: 2019 Dodge Charger - recall 19V758, incompatible front wheel and brake package