The Bosch 1987302202 is a P21/5W dual filament taillight bulb with a double contact bayonet base, designed to serve both the tail light and brake light functions within a single housing. Available at Dub Source JA, Kingston’s dedicated VW and Audi parts specialist in Jamaica. WHAT IT IS The P21/5W designation tells you everything about how this bulb works. The two numbers refer to the two separate filaments inside the glass housing, each rated at a different wattage. The double contact base has two contact points at the bottom rather than one, which is how the car’s electrical system controls each filament independently. This is a direct replacement bulb, meaning it slots into the existing socket with no modification required. WHAT EACH FILAMENT DOES The lower-wattage filament illuminates at reduced brightness whenever the headlights or parking lights are switched on, acting as the permanent tail light that makes the vehicle visible to traffic behind. The higher-wattage filament activates when the driver applies the brakes, producing a noticeably brighter light that signals to following drivers that the vehicle is slowing down. Both functions rely on the same bulb working correctly, which is why a failed P21/5W can affect both the tail light and the brake light simultaneously depending on which filament has gone. WHY IT MATTERS A failed tail light or brake light is both a road safety issue and a legal one. On Jamaican roads where rear visibility matters particularly at night, a non-functioning brake light significantly increases the risk of a rear-end collision. On modern Volkswagen and Audi models a failed bulb will typically trigger a warning on the dashboard, but older models may not alert the driver at all, making periodic checks important. COMPATIBILITY The Bosch P21/5W 1987302202 fits selected Volkswagen and Audi models that use the double contact bayonet format in their tail light assembly. Fitment varies by model and year. Use our VIN Part Matching service to confirm this is the correct bulb for your vehicle, or browse our full Electrical parts range for related lighting components. AVAILABILITY In stock at 70A Mannings Hill Road, Kingston. We deliver island-wide across Jamaica. Call 876-740-9332 or order at dubsourceja.com. Bosch P21/5W Taillight Bulb 1987302202 available at your Volkswagen and Audi parts specialist in Kingston, Jamaica.