High-Brightness LED Chip: LED tail light bulb unit utilizes high-quality LED chips, boasting significantly higher brightness than traditional bulbs. It illuminates instantly when braking (without delay), improving detection of vehicles behind you, effectively shortening reaction time, and enhancing driving safety at night and in rainy and foggy conditions
Precise Fit: LED tail light bulb unit is suitable for Cadillac ATS 3.6L and XTS 3.6L models from 2013–2018, perfectly matching the original lamp socket and circuitry. It replaces 84198978 and 13579168, requiring no modification or decoding. No fault codes are detected after installation, ensuring a secure fit
Safety Upgrade: LEDs offer lower energy consumption, higher brightness, and an exceptionally long lifespan, significantly reducing replacement frequency. Providing a clear warning when braking, the 84198978 Tail Light Bulb LED Unit significantly improves driver visibility and reduces the risk of rear-end collisions
Durable: 84198978 Tail Light Bulb LED Unit features IP67-rated waterproof and dust protection. Its aluminum heat sink housing is heat-resistant and vibration-resistant, effectively protecting against rain, snow, and engine compartment heat, extending its service life in harsh road conditions
Easy Installation: LED unit lighting accessories require no wires or adapters. Replacement is accomplished in minutes using only basic tools, saving time, effort, and maintenance