* Specific V6 engine: Ford offered different V6 engines in the 2003 F-150. The 4.2L and the 4.6L had different capabilities.
* Cab style: Regular cab, SuperCab, or SuperCrew all affected payload and towing capacity.
* Drivetrain: 4x2 (rear-wheel drive) models typically had higher towing capacities than 4x4 (four-wheel drive) models.
* Axle ratio: Higher axle ratios allowed for greater towing capacity.
* Options: Packages and added features could slightly alter the towing capacity.
Therefore, there's no single answer. You *must* consult your specific 2003 Ford F-150's owner's manual. This manual will list the exact towing capacity for your truck's configuration. The information sticker on the driver's side doorjamb may also provide this data.
Looking up the towing capacity online without knowing the precise configuration of your truck is unreliable and could lead to unsafe practices. Always refer to your owner's manual for the correct information.
