Is your ABS light on in your 99-04 Mustang? It may be time to replace your abs sensor! This rear ABS sensor is a direct replacement and fits the left rear side of your 1999-04 Mustang (Except 1999-04 Cobra). Your ABS sensors act as an integral part of your braking system. When these start to malfunction, your ABS light can illuminate and you may feel your ABS kicking in while braking under regular driving conditions. Make sure your Mustang ABS sensors are working properly with quality replacement sensors from Latemodel Restoration Supply!