Why does a Volkswagen only have one brake light on?
2 Answers
Volkswagen vehicles only illuminate one brake light due to either a burnt-out bulb or a blown brake light fuse. Taking the Volkswagen Tiguan L as an example, here are its specific details: 1. Powertrain: The Tiguan L is equipped with a 2.0L displacement engine, delivering a maximum power of 137 kW and peak torque of 320 N·m. It is paired with a 7-speed wet dual-clutch transmission. 2. Exterior: The Tiguan L's front grille incorporates abundant chrome accents. The Panorama Comfort trim adds an openable panoramic sunroof, while the Intelligent Luxury version enhances smart features. 3. Interior: It features an all-new dual digital screen design, with the instrument cluster upgraded to a 10.2-inch full LCD display.
I've been a Volkswagen master mechanic for over 20 years and have encountered many cases of single-side brake light illumination. The most common cause is simply bulb lifespan expiration - the standard halogen bulbs Volkswagen uses typically last about 2-3 years before needing replacement. Another frequent issue is oxidized wiring connectors, especially in humid southern regions where copper contacts rust and cause poor connections. If you notice this problem suddenly after driving in rain, there's an 80% chance it's due to aged tail light seal strips letting water in. These fixes aren't expensive - a bulb replacement costs about 10 yuan. I recommend directly purchasing a pair of LED bulbs instead, as they offer longer lifespan and higher brightness. Additionally, Volkswagen's circuit board solder joints are prone to issues - prolonged vibration can loosen them, requiring professional inspection. Remember, brake lights are critical for safety - address any problems immediately when discovered, don't delay!
