|Length:||1.3 miles (2.1 km)|
|Route outline (key)|
The A4003 is a short A-road in north London.
It runs along Willesden Lane, a continuation of the A407 Willesden High Road, starting at traffic lights where the A407 TOTSOs. The road heads east along a residential road and goes over the North London Line before bending left to enter Kilburn. The road ends here when it meets the A5 at a very busy signalised junction. Most of Willesden Lane, however, is a fairly quiet road.