MechanMagic Keyless Entry Remote Replacement for Chrysler/Dodge M3M40821302 — Preinstalled Battery, Ready to Program

MechanMagic keyless entry remote replacement M3M40821302 is a fully assembled, battery‑included key fob built to replace OEM remotes for select Chrysler and Dodge models.

This MechanMagic replacement remote is designed as a drop‑in hardware swap for owners who need a ready‑to‑program key fob compatible with FCC ID M3M‑40821302. The unit ships pre‑assembled with battery and internal electronics, matching several factory part numbers so it’s straightforward for an auto locksmith or dealership to pair with your vehicle’s security system. It does not support user self‑programming and should be professionally programmed to ensure full functionality.

What vehicles and part numbers does this remote fit?

This remote is intended for particular Chrysler and Dodge models from mid‑2010s to early‑2020s. Check your vehicle’s compatibility list or the FCC ID printed on your original fob before purchasing to confirm fitment.

• Compatible FCC IDs: M3M‑40821302, M3M40821302
• Common vehicle matches: Chrysler 200 (2015–2017), Chrysler 300 (2019–2021)
• Dodge models covered: Charger and Challenger (2019–2021)
• Factory part numbers matched: 68155687AB, 68394191AA, 68394195AA

How much setup is needed to use this replacement key fob?

The remote arrives with battery and electronics installed so no assembly is required, but it must be programmed by a dealer or qualified locksmith. There is no customer self‑programming procedure for this model; professional tools are necessary to synchronize the fob with your car’s immobilizer and remote systems.

• Ships ready to program—battery and electronics pre‑installed
• Professional programming required (dealership or certified locksmith)
• No on‑vehicle self‑programming or key cutting included
• Programming typically activates lock/unlock, remote start (if vehicle equipped), and panic functions

What features and components are included with the MechanMagic fob?

The MechanMagic remote is supplied as a finished unit that mirrors OEM electrical components and button layout. It’s built to replace worn or lost factory remotes and is offered as an economical alternative to dealer parts, while maintaining compatibility with the vehicle’s original systems when properly programmed.

• Pre‑installed battery and internal electronics for immediate programming
• Identical button layout for lock, unlock, remote start/panic where applicable
• Manufactured to meet FCC ID specifications for direct replacement
• Retail packaging includes one complete remote ready for programming

Will this remote work with my car’s remote start and security features?

When matched to a compatible vehicle and correctly programmed, the replacement can operate the same remote functions as the original fob. Capabilities like remote start depend on whether your vehicle has that factory feature enabled; programming by a dealer or locksmith will confirm which functions will be active.

• Remote start function supported only if vehicle equipped and programming enabled
• Panic and door lock/unlock behaviors mirror original fob once programmed
• Dealer or locksmith can confirm feature availability during programming

Who this is for: The MechanMagic M3M40821302 replacement remote suits owners of compatible Chrysler and Dodge vehicles who need a fully assembled, battery‑included spare or replacement fob. It’s ideal for those wanting an OEM‑style hardware swap at lower cost than dealer parts, provided you plan to have the unit professionally programmed. If you prefer a plug‑and‑play remote you can program yourself, consider a different model that supports user programming.