The Chevrolet Malibu brake light utilizes 7440, 7443, 3057, 2057, and 1157 bulb sizes for various lighting applications. Available information covers a span of time from 1964 through 2024.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Malibu brake bulb specifications span model years 1964 through 2024, with three distinct bulb families appearing across that range: the 1157/2057 group with BAY15d bayonet bases, the 3057 wedge group, and the 7440/7443 wedge group.
The 7440 is a single-filament T20 wedge bulb rated at 12V and 21W, used in the Chevrolet Malibu for model years 2019-2024. Its single-filament design means it handles only one lighting function, unlike dual-filament types that serve two functions from one bulb.
The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W high filament and a 5W low filament. It shares the same T20 wedge form factor as the 7440 but carries an additional filament, making the two types physically similar yet functionally and electrically distinct.
The 2016-2018 Malibu uses the 7443 specifically on trims without LED tail lights. The 2019-2020 Malibu uses the 7440 specifically on trims with halogen capsule headlamps, indicating that trim-level lighting configurations directly determine which brake bulb size applies.
Because the 7440 and 7443 share the T20 wedge base, one may physically seat in the socket of the other. However, substituting a single-filament 7440 where a dual-filament 7443 is specified would result in the loss of one lighting function, making them non-interchangeable in practice despite their physical similarity.
The 3057 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament. It was the brake bulb for the Malibu across model years 1997-2007. The T25 base is larger than the T20 used by the 7440 and 7443, so these groups are not interchangeable.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W high filament and a 5W low filament. It was used in the Malibu from 1964-1982, representing the longest continuous bulb family in these specifications. The BAY15d base is a two-pin offset bayonet mount, a fundamentally different socket type from the wedge bases used in later model years.
The 2057 appeared in the 1983 Malibu as the sole brake bulb for that year. It shares the BAY15d bayonet base with the 1157 and is described as a brighter variant, rated at 12V with a 26.9W high filament and an 8W low filament. While the 2057 can physically fit a 1157 socket due to the shared base, its higher wattage output distinguishes it from the 1157.
The 912 is a single-filament T15 wedge bulb rated at 12V and 12W, used exclusively in the center high mount stop light position on the 1997-2003 Malibu. It is a variant of the 921 bulb type and occupies a separate sub-part category from the main brake bulbs on those same model years, which used the 3057.
All bulb sizes listed across these specifications conform to ANSI standards applicable in the United States and Canada, meaning each size designation corresponds to a standardized set of electrical and physical characteristics rather than a proprietary specification.