I need a leaf spring for my 03 ford ranger edge. Will a leaf spring off of a Mazda B4000 be compatabile? I'm just a single mom and not mechanically inclined. Asking for any and at advice!! Thnx in advance!!

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The B4000 Mazda is a Ranger in Mazda badging. If you have a 4.0 V6 engine, it should swap in with no problem. Actually, the engine size may make zero difference. More likely it is the size and style of the truck bed, as there are multiple lengths and two styles, slab sided and showing the rear wheel wells.
I'd get one of the same style and length, and likely it would fit.
tom