Home› Suspension > Suspension, Springs and Related Components› Dorman 43-863 Leaf Spring Assembly - Rear
Dorman 43-863 Leaf Spring Assembly - RearOE Quality 60-Day Returns
Part #: 43-863

Dorman 43-863 Leaf Spring Assembly - Rear

Rear
50 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$286.04Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford and Mazda, B2300, B2500, B3000, B4000, and Ranger
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Leaf Spring Assembly options

Dorman 43-863 Leaf Spring Assembly

Dorman 43-863 is a rear leaf spring assembly built for select Ford Ranger and Mazda truck applications. It restores suspension support for vehicles that need consistent ride height, stable payload handling, and predictable rear-end control.

Key Features

  • Steel leaf spring construction for suspension support
  • Rear axle orientation for listed Ford Ranger and Mazda applications
  • 4-leaf design with 2.5 in. leaf width
  • Average load rate of 1350 for listed fitments
  • Black bushings included
  • Standard replacement suspension grade
  • Berlin eye attachment at both ends
  • Compatible with rear applications on Ford Ranger, Mazda B2300, Mazda B2500, Mazda B3000, and Mazda B4000

Detailed Description

This Dorman leaf spring assembly is engineered as a direct replacement for rear suspension service on select compact and midsize trucks. It is listed for 1986-2003 Ford Ranger rear applications, plus Mazda B2300, B2500, B3000, and B4000 rear fitments across the model years shown. The spring pack uses steel construction, a 4-leaf layout, and a 1,350 lb. average capacity for the specified applications, helping maintain proper rear suspension geometry and load support. If you are searching for a rear leaf spring for Ford Ranger 1986-2003 or a Mazda B-series rear leaf spring replacement, Dorman 43-863 is a fitment-specific option to review against your vehicle’s suspension specs.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

  • Sagging rear ride height
  • Reduced load-carrying support
  • Rear suspension instability under cargo weight
  • Uneven rear stance from worn spring packs
  • Loss of consistent suspension response on Ford Ranger and Mazda B-series trucks

Installation Notes and Tips

Verify axle orientation, spring length, arch, and pack thickness against the original part before installation. Confirm rear fitment for your exact Ford Ranger or Mazda B-series model year and suspension configuration, since the listed applications include multiple year ranges and notes. Inspect bushings, mounting points, and related suspension hardware for wear before reassembly. Professional installation is recommended for proper alignment of the spring eyes and rear suspension components.

Quality Assurance

Dorman supplies this as a standard replacement leaf spring assembly for the listed applications. The part number 43-863 should be matched to the vehicle fitment data and suspension measurements to confirm correct application before purchase.

BrandDorman
Part Number43-863
MaterialAcero
MaterialSteel
Bushing ColorBlack
Bushing ColorNegro
Bushing ColorNoir
ColorBlack
ColorNegro
ColorNoir
Load Rate1350
Suspension Grade TypeReemplazo estándar
Suspension Grade TypeStandard
Leaf Quantity4
Leaf Width2.5
Axle OrientationArrière
Axle OrientationRear
Axle OrientationTrasero
Helper SpringNo
Helper SpringNon
Axle Modification NeededNo
Axle Modification NeededNon
Bushings IncludedOui
Bushings IncludedSí
Bushings IncludedYes
Mounting Hardware IncludedNo
Mounting Hardware IncludedNon
Length Axis 125.625
Length Axis 225.625
Pack Thickness1.584
Leaf Spring Arch Length4.375
Spring Research Institute Number43-863

This part fits 50 vehicles. Search below:

YearMakeModelPositionNotes
2003FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2003MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2003MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2003MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2002FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2002MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2002MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2002MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2001FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2001MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2001MazdaB2500Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2001MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2001MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2000FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2000MazdaB2500Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2000MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
2000MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1999FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1999MazdaB2500Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1999MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1999MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1998FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1998MazdaB2500Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1998MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1998MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1997FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1997MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1997MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1997MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1996FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1996MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1996MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1996MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1995FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1995MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1995MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1995MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1994FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1994MazdaB2300Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1994MazdaB3000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1994MazdaB4000Rear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1993FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1992FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1991FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1990FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1989FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1988FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1987FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1986FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity
1983FordRangerRear3 Leaf / 1 Leaf = 4 Leaf Spring; 1.5625 In. Pack Thickness; 1,350 Lb. Average Capacity; To 1/83

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

043-0863-0020-07043-863DAYE67A5560UBE67AUBE6TZ5560M

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Related Articles