Car enthusiasts often discuss the appeal of “Euro Spec” parts, especially when it comes to automotive lighting. A prime example is the difference between Euro spec and US spec taillights, particularly noticeable in European car brands like BMW. Many owners in the United States prefer to swap out their factory-installed US spec taillights for the Euro spec versions. But what exactly is the difference, and why the preference?
The primary distinction lies in the turn signal color. Euro spec taillights feature amber turn signals, a standard mandated by European regulations. Conversely, US spec taillights often utilize red turn signals. This isn’t due to manufacturers intentionally making cars look “American,” but rather stems from differing automotive lighting regulations across the Atlantic.
In Europe, the regulation explicitly requires amber for turn signals to enhance visibility and distinguish them clearly from brake lights. However, North American regulations don’t stipulate the color of turn signals but do have specific requirements regarding the minimum surface area for brake lights and turn signals. To meet these surface area requirements efficiently and cost-effectively without significant redesigns, many manufacturers in the US market integrate the turn signal function into the red brake light. Using a single, larger red light for both braking and turning simplifies the taillight assembly design and production. This practical approach allows automakers to comply with US regulations while optimizing design and manufacturing costs.
Ultimately, the choice between red and amber turn signals is rooted in regulatory differences and manufacturing efficiencies. For many car enthusiasts, especially those who appreciate the distinctiveness and perceived enhanced safety of amber turn signals, Euro spec taillights remain a sought-after upgrade.
