Chevrolet Captiva Sport Brake Bulb Size

Additional Notes

• The Chevrolet Captiva Sport uses two distinct brake bulb sizes across its production run, with the 7443 fitted to 2013-2015 models and the 3157 fitted to the 2012 model.
• The 7443 is a dual-filament wedge bulb classified under the T20 body type, operating at 12 volts with a wattage rating of 21W on the high filament and 5W on the low filament.
• The 3157 is a dual-filament wedge bulb classified under the T25 body type, operating at 12 volts with a wattage rating of 27W on the high filament and 7W on the low filament.
• Both the 7443 and 3157 conform to ANSI standards applicable in the United States and Canada.
• The T25 body type of the 3157 is physically larger than the T20 body type of the 7443, which means the two bulbs are not interchangeable despite sharing a dual-filament wedge design.
• The higher wattage ratings of the 3157 relative to the 7443 indicate that the 2012 Captiva Sport brake circuit draws more power per bulb than the 2013-2015 configuration.
• Dual-filament bulbs serve two lighting functions from a single unit, with the lower-wattage filament typically used for the tail light function and the higher-wattage filament activated for braking.
• The change from the 3157 in 2012 to the 7443 from 2013 onward represents a shift to a lower-wattage bulb in a smaller form factor, which requires confirmation of the correct size before replacement.