The red and black Hellcat key fobs authorize different levels of powertrain output and access to SRT Drive Mode options. The red fob enables the vehicle’s full factory-rated power potential; the black fob selects reduced engine output and restricts some settings. The exact output and number of fobs depend on the vehicle, model year, trim, and calibration.
What the red and black keys do
The fob does not add horsepower or install a separate engine tune. It tells the vehicle which available power level and settings the driver is authorized to use. With the red fob, the driver can access the Hellcat’s full rated output and available Drive Mode choices. With the black fob, the vehicle uses a reduced-output setting, reduces transmission shift schedules, and limits available Drive Mode options, as described in Dodge’s 2018 Challenger SRT Quick Reference Guide and 2020 Challenger SRT Drive Modes supplement.
| Fob or feature | What it does | Important caveat |
|---|---|---|
| Red fob | Authorizes the vehicle’s full rated horsepower and torque potential and available SRT Drive Mode choices. | It does not automatically select the most aggressive settings; the driver can choose among permitted modes. |
| Black fob | Authorizes reduced engine output, reduced transmission shift schedules, and fewer Drive Mode options. | It is not a guarantee of safety and is not identical to Valet Mode. |
| Valet Mode | A separate, PIN-protected in-vehicle software mode. | Dodge documents it separately from the red and black fobs; restrictions depend on the vehicle and calibration. |
| Enhanced Security Mode | A separate anti-theft feature that can limit engine output to less than 3 horsepower. | It is not the ordinary black-fob setting. Dodge describes it as requiring a dealer reflash or vehicle security procedure. |
Horsepower depends on the Hellcat
“Red key” does not mean one fixed horsepower figure across all Hellcat models. Dodge’s 2020 Challenger SRT Drive Modes supplement lists 707 horsepower for the Charger 6.2L, 717 horsepower for the Challenger 6.2L, and 797 horsepower for the Challenger 6.2L High Output. Dodge’s SRT page shows a Redeye application with 500 horsepower using the black fob and 797 horsepower using the red fob. Earlier Dodge material describes the original Hellcat’s 707-horsepower red-fob output.
The black-fob setting is commonly presented as 500 horsepower, but that should not be treated as a universal rule for every Hellcat-branded vehicle or model year. Check the specific owner’s manual and vehicle configuration for applicable figures and features.
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Red key, black key, and driving modes
The red fob authorizes full available output; it does not automatically put the car in Track, Race, or another aggressive mode. Dodge’s 2020 Challenger SRT Drive Modes supplement explains that the red fob permits selection among available power levels in SRT Mode Setup. Depending on equipment and the selected mode, Drive Modes can affect engine, transmission, steering, throttle response, suspension, traction, and related controls.
The black fob is useful when an owner wants the car to start with reduced output and fewer settings available, such as when lending it to someone or leaving it with a valet or service facility. Even in reduced-output mode, a Hellcat remains a high-performance car. The fob is not a substitute for choosing appropriate settings and driving responsibly for the road, weather, tires, and traffic.
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How many fobs should a Hellcat have?
“Two-key system” refers to two authorization types, not necessarily exactly two physical fobs. The 2020 Challenger owner’s manual says 6.2-liter supercharged SRT vehicles come with two red fobs and one black fob. The 2022 Charger SRT supplement describes the same two-red, one-black configuration. Confirm the expected fobs for the particular vehicle using its owner documentation.
The best-documented applications of the red-and-black system are the Dodge Challenger SRT Hellcat and Dodge Charger SRT Hellcat families, including some Redeye models. Do not assume that every vehicle carrying the Hellcat name has identical fob colors, power levels, fob counts, or available modes. Check the exact owner’s manual or a VIN-specific parts catalog.
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Replacing a missing fob
A replacement is a vehicle-specific transmitter, not just a colored shell. Dodge’s 2022 Charger SRT supplement says black fobs must be replaced with black fobs and red fobs with red fobs. Mopar’s parts catalog lists transmitters by vehicle application, and compatibility depends on the model and year.
- Identify the vehicle’s model year, body style, trim, and VIN.
- Confirm the correct fob color, part number, and compatibility with an authorized Dodge or Mopar dealer or a qualified automotive locksmith.
- Ask what vehicle-specific programming or initialization is required before buying the replacement.
- Verify that the replacement provides the correct authorization level for the vehicle.
A visually similar aftermarket fob may not have the correct compatibility or authorization. Avoid assuming that every replacement can restore the original function; confirm the part and procedure for the specific car.
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Fob battery and case maintenance
A weak fob battery is a maintenance issue, not a change to the fob’s red or black authorization. The 2017 Challenger SRT owner’s manual explains how to remove the emergency key, open the fob case, replace the battery, and reassemble the case while protecting its seal. Follow the procedure for the vehicle’s own model year rather than forcing the case open.
FAQ
Does the red key add horsepower?
No. It authorizes access to the vehicle’s full factory-rated power potential. The vehicle’s rated output depends on model, year, trim, and calibration.
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Does the black key always limit a Hellcat to 500 horsepower?
No single figure applies to every Hellcat. Five hundred horsepower is a common black-fob setting in Dodge material, but power levels vary by application. Check the documentation for the specific vehicle.
Is the black key the same as Valet Mode?
No. Dodge describes the black fob as a reduced-output authorization level and Valet Mode as a separate, PIN-protected software mode. Restrictions vary by vehicle and calibration.
Why might a Hellcat have three fobs?
Some documented 6.2-liter supercharged SRT vehicles came with two red fobs and one black fob. The two colors represent authorization types, so “two-key” does not necessarily mean only two physical fobs.
What should I do if I lose a red or black fob?
Check the vehicle’s VIN-specific parts and programming requirements with a Dodge or Mopar dealer or a qualified automotive locksmith. Confirm that the replacement fob has the correct color and authorization for the vehicle before purchase.
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