2009-2020 Dodge Charger Brake Fluid Type and Flush Interval

By Core Brake Parts Tech Team — Circleville, OH warehouse

Every 2009-2020 Dodge Charger, from the 3.6L V6 through the 5.7L, 6.4L and supercharged 6.2L cars, uses Mopar DOT 3 brake fluid (SAE J1703) in the master cylinder, and Dodge says DOT 4 is acceptable if DOT 3 is not available. The 2020 owner's manual adds that DOT 4 fluid must be changed every 24 months, time based only, with no mileage interval. Most shops apply that same two-year habit to DOT 3, because both fluids pull moisture from the air.

What Brake Fluid Does a Dodge Charger Take?

The spec has not changed across this generation. The 2010 and 2012 Charger owner's manuals both list the brake master cylinder fluid as Mopar DOT 3 and SAE J1703 or equivalent, with DOT 4 acceptable as a fallback, and they add a plain instruction: use only recommended brake fluids. The 2020 manual says the same thing in slightly different words: Mopar DOT 3 recommended, DOT 4 acceptable. The manual also points out that the correct fluid type is identified on the original factory master cylinder reservoir, so the reservoir is a quick way to confirm on your own car.

What you should never put in a Charger: DOT 5 silicone fluid, power steering fluid, transmission fluid or anything petroleum based. The owner's manual warns that petroleum contamination can damage brake seal components and cause partial or complete brake failure. If that has happened, a flush is not enough; the rubber seals in the master cylinder, calipers and ABS unit have to be dealt with.

DOT 3 vs DOT 4 on a Charger: The Numbers That Matter

Both DOT 3 and DOT 4 are glycol-based fluids, and the federal brake fluid standard (FMVSS 116) sets their minimum boiling points. The "dry" number is new fluid out of a sealed bottle; the "wet" number is fluid that has absorbed moisture, which is closer to what your car is running on after a couple of years.

For a daily-driven V6 or R/T, DOT 3 is exactly what the car was engineered around. DOT 4 gives more margin against heat, which is why owners who tow, run autocross or drive a Scat Pack or Hellcat hard often choose it. The trade-off is that the manufacturer puts a hard 24-month change requirement on DOT 4. Brembo also notes that even though DOT 3 and DOT 4 are both glycol based, their chemical composition differs, so the clean approach is to pick one fluid and flush the system with it rather than topping off one type with the other.

Why Charger Brake Fluid Has to Be Changed on Time, Not Miles

Glycol brake fluid is hygroscopic. Brembo explains that over time the fluid absorbs moisture from the air through the porosity of the brake lines, and that the boiling point of three-year-old fluid can be significantly lower than new fluid. That happens whether the car is driven daily or parked in a garage most of the year, which is why Dodge writes the DOT 4 interval as time based only.

The owner's manual spells out the consequence: fluid that has absorbed moisture has a lower boiling point and may boil unexpectedly during hard or prolonged braking, resulting in sudden brake failure. On a heavy, powerful sedan like the Charger, long downhill grades and repeated high-speed stops are exactly where that shows up. Old fluid also carries moisture to the metal parts inside the calipers and the ABS hydraulic unit, and the ABS unit is the most expensive single piece of hydraulic hardware on the car.

A sensible schedule for most owners:

• DOT 4 in the system: change every 24 months, as the manual requires.
• DOT 3 in the system: plan on every 2 to 3 years, the range Brembo recommends, and sooner if the fluid is dark.
• Track days, towing, mountain driving: change it more often, and always before a track event.
• After any brake hydraulic repair: a caliper, hose or master cylinder replacement is a natural time to flush the whole system.

Signs Your Charger's Brake Fluid Is Due

• Two or more years since the last change, or no record of it ever being done. On a used Charger, assume it is due.
• Dark fluid in the reservoir. New fluid is clear to light amber. Brown or black fluid is old and contaminated.
• A pedal that gets soft or long during hard use and firms up after the brakes cool. That points to fluid boiling in the calipers.
• Brake warning light on. The Charger's red brake light monitors fluid level as well as the parking brake. The manual notes it can flash momentarily during sharp cornering as fluid level shifts, but a low level is a reason to have the system checked.

Keep in mind that a slowly falling level is normal as pads wear: the manual says fluid level can be expected to fall as disc brake pads wear. Do not top it up to the brim between services. The manual warns that overfilling can spill fluid onto hot engine parts, where it can catch fire, and brake fluid also damages painted surfaces. A level that drops quickly, or fluid on the inside of a wheel, means a leak at a caliper, hose or line that needs to be found before anything else.

How a Charger Brake Fluid Flush Is Done

The Charger has four-wheel disc brakes with ABS and electronic stability control. A flush pushes new fluid through each caliper until clean fluid comes out of the bleeder screws, generally working from the corner farthest from the master cylinder toward the closest. The basic steps:

1. Remove the brake fluid reservoir access cover under the hood, clean around the cap, and siphon out as much old fluid as you can.
2. Refill with fresh DOT 3 (or DOT 4). The manual says to use only new fluid or fluid kept in a tightly closed container.
3. Bleed each caliper in turn with a helper, a pressure bleeder or a vacuum bleeder until the fluid runs clear with no bubbles, and never let the reservoir run dry.
4. Fill to the level marked on the reservoir, tighten the bleeders to the value in the factory service manual and test the pedal before driving.

If air gets into the ABS hydraulic unit, for example because the reservoir ran dry or the master cylinder was replaced, a normal bleed may not clear it. Many shops use a scan tool to cycle the ABS pump and valves during bleeding; follow the factory service procedure for your model year. For a DIYer with a helper, a routine flush is a manageable driveway job. Buy fresh sealed bottles and do not reuse what comes out.

What to Replace at the Same Time

Because the wheels are already off and the bleeders are open, a fluid change is the best time to look at everything else in the system. The 2020 owner's manual calls for an inspection of the brake pads, rotors, hoses and park brake at every oil change interval, so use the flush as that inspection:

• Pads and rotors. If pads are near their wear limit or the rotors are scored or cause a pulsing pedal, do them now so you are not opening things up again. We carry a front and rear rotor and pad kit for the 2009-2020 Dodge Charger, along with separate replacement brake pads and brake rotors.
• Rubber brake hoses. Cracked, bulging or seeping hoses should be replaced before the new fluid goes in. See our brake hoses.
• Calipers. A caliper with a sticking piston, a torn boot or a seized bleeder is worth replacing during the flush. Browse brake calipers.
• Hardware. Fresh clips and slide pin boots keep new pads from dragging: brake hardware kits.

Frequently Asked Questions

Can I use DOT 4 brake fluid in my Dodge Charger?

Yes. Dodge's owner's manuals for this generation say that if DOT 3 is not available, DOT 4 is acceptable. The 2020 manual adds that DOT 4 must be changed every 24 months, based on time only.

Can I use DOT 5 brake fluid in a Charger?

No. The Charger is specified for DOT 3 (SAE J1703), with DOT 4 as the only listed alternative. DOT 5 is silicone based and is not a listed fluid for this car. The manual warns that using the wrong type of brake fluid can severely damage the brake system or impair its performance.

How often should I flush the brake fluid on a Dodge Charger?

If the car has DOT 4, every 24 months regardless of mileage, as the manual requires. With DOT 3, every 2 to 3 years is a sound interval, and more often if you tow, track the car or drive in the mountains.

Do the Charger SRT, Scat Pack and Hellcat use a different brake fluid?

The 2020 owner's manual lists one brake master cylinder fluid for the whole Charger line, including the 6.4L and supercharged 6.2L engines: Mopar DOT 3 recommended, DOT 4 acceptable. Owners who drive these cars hard often run DOT 4 for its higher boiling point and change it on the 24-month schedule or sooner.

Is it OK to mix DOT 3 and DOT 4?

Dodge allows either fluid, but Brembo notes the two have different chemical compositions even though both are glycol based. A top-off to get home will not ruin anything, but the best practice is to flush the system completely with one type.

Why does my Charger's brake fluid level keep dropping?

A slow drop is normal as the pads wear, because the caliper pistons move out and hold more fluid. A fast drop, or a brake warning light that stays on, points to a leak at a caliper, hose, line or the master cylinder and should be checked right away.

Sources

1. 2020 Dodge Charger Owner's Manual - Mopar DOT 3 recommended, DOT 4 acceptable, DOT 4 changed every 24 months time based; brake fluid warnings; pad, rotor and hose inspection at each oil change
2. 2012 Dodge Charger Owner's Manual - Mopar DOT 3 and SAE J1703 or equivalent, DOT 4 acceptable
3. 2010 Dodge Charger Owner's Manual - same DOT 3 / SAE J1703 specification for the early Charger
4. 49 CFR 571.116, FMVSS 116 Motor Vehicle Brake Fluids - DOT 3 and DOT 4 minimum dry and wet boiling points
5. Brembo - Brake Fluid for Cars - fluid absorbs moisture through the lines, boiling point drops with age, 2 to 3 year replacement, DOT 3 and DOT 4 chemistry differs