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Replacement Key for Battery Switches

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This red replacement key fits our master battery cutoff switches (Part Numbers 4430 and 4431) as well as some other brands. Known compatible brands include Hella, Merit, OMP, and Rudolf Bruggemann. A shroud on the center post helps to minimize dust and moisture getting into the swtich when the key is in the on position. Sold individually.

Part No.
Stock Status

Condition: New

In Stock

Saved time and money


Good quality and availability


Virginia Beach, VA


It's Very Hard To Lose a Key This Big!


Thanks, Pegasus, for carrying spare BIG red keys for the Master Battery Switch. Finding specialty Formula car items isn't easy, but I always start searching at your website and 99.9% of the time I find exactly what I'm looking for. I'm in the process of putting my Lynx Formula V on the street with a 120 Hp engine. I am installing the BIG red key master battery switch as an anti-theft measure. Should I ever misplace the BIG red key, this spare one will be stashed in an obscure hiding place.


Lake Arrowhead, CA

Replacement Key for Battery Switches

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