This aftermarket replacement overrun device, compatible with AL-KO 1251911NO specifications, is designed for trailers with a V-drawbar and a permissible total weight range, typically from 750 kg up to 1000 kg. As a non-OEM alternative, this complete system (E.V.90S/3 1000 AK161 GS CPL) provides a reliable and cost-effective solution for maintaining your trailer's braking performance. The overrun device, also known as an Auflaufeinrichtung, is a critical component of a braked trailer system. It automatically applies the trailer's brakes when the towing vehicle decelerates, ensuring safe and controlled stopping. This specific unit is engineered to be a direct fit replacement for the AL-KO 90S/3 series, commonly found on various utility, boat, and caravan trailers. Key features include robust construction for durability and an integrated AK161 coupling head, which is a standard AL-KO ball coupling designed for 50mm tow balls. This ensures secure attachment to your towing vehicle. Choosing an aftermarket replacement like this offers a practical way to restore your trailer's braking functionality and compliance with road safety regulations without the premium cost of an original equipment manufacturer part. It's an ideal choice for repairs or upgrades, providing essential safety and operational reliability for your trailer.