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Dorman 90-303 Leaf Spring Assembly - Rear Left or Rear Right
Dorman 90-303 Leaf Spring Assembly
Restore rear suspension height and spring tension with this Dorman leaf spring assembly. Built from steel with black bushings and a standard suspension grade design, it addresses sagging ride height caused by fatigued or rusted leaf springs. Compatible with 2003-2004 Toyota Tundra rear left and rear right applications listed below.
Key Features
- Steel construction for durable rear suspension support
- Standard suspension grade type
- 4-leaf design with a 1325 load rate
- Black finish with black bushings included
- Up-turned eye attachment at both ends
- Rear axle orientation
- No axle modification needed for listed applications
- Compatible with 2003-2004 Toyota Tundra rear left and rear right fitments
Detailed Description
The Dorman 90-303 leaf spring assembly is a direct replacement for rear suspension service on select Toyota Tundra models. It uses a steel spring pack with a 2.375-inch leaf width, 7.875-inch arch length, and 1.83-inch pack thickness, along with included bushings for a complete spring assembly. This part cross-references Toyota 48220AF030 for the same application. For buyers searching for a 2003 Toyota Tundra rear leaf spring assembly or a 2004 Toyota Tundra rear suspension spring replacement, Dorman 90-303 provides the specified fitment and dimensions needed for the listed vehicles.
What It Helps Fix
- Sagging rear suspension height
- Reduced spring tension from fatigued leaf springs
- Rust-damaged or worn rear spring packs
- Uneven rear ride stance on Toyota Tundra trucks
- Loss of rear suspension support under load
Installation Notes and Tips
Verify rear left or rear right fitment against the vehicle notes before installation. This assembly is listed for 2003 Toyota Tundra Crew Cab Pickup and 2004 Toyota Tundra standard bed applications, with notes that include 3 leaf / 1 leaf to 4 leaf spring configurations and 1.875-inch pack thickness. Mounting hardware is not included, so reuse or source the required hardware separately as needed. Confirm that the vehicle matches the listed rear stabilizer bar notes before ordering.
Quality Assurance
Dorman replacement suspension components are built to match the specified application details for the listed Toyota Tundra fitments. Part number 90-303 is engineered to restore proper spring tension and rear suspension performance on the confirmed applications.
| Brand | Dorman |
|---|---|
| Part Number | 90-303 |
| Material | Steel |
| Bushing Color | Black |
| Color | Black |
| Load Rate | 1325 |
| Suspension Grade Type | Standard |
| Leaf Quantity | 4 |
| Leaf Width | 2.375 |
| Axle Orientation | Rear |
| Helper Spring | No |
| Axle Modification Needed | No |
| Bushings Included | Yes |
| Mounting Hardware Included | No |
| Length Axis 1 | 28.56 |
| Length Axis 2 | 28.56 |
| Length Axis 2 | 31.87 |
| Pack Thickness | 1.83 |
| Leaf Spring Arch Length | 7.875 |
| Spring Research Institute Number | 90-303 |
| End 1 Attachment Type | Up turned eye |
| End 2 Attachment Type | Up turned eye |
| Maximum Drop | 0 |
| Package Contents | 1 leaf spring |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Body Type | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2004 | Toyota | Tundra | Crew Cab Pickup | RWD | 4.7L | V8 | Rear Left | 3 Leaf / 1 Leaf = 4 Leaf Spring; 1.875 In. Pack Thickness; w/Standard Bed; wo/Rear Stabilizer Bar |
| 2004 | Toyota | Tundra | Crew Cab Pickup | RWD | 3.4L | V6 | Rear Right | 3 Leaf / 1 Leaf = 4 Leaf Spring; 1.875 In. Pack Thickness; w/Standard Bed |
| 2003 | Toyota | Tundra | RWD | 4.7L | V8 | Rear Left | Crew Cab Pickup; 3 Leaf / 1 Leaf; 1.875 In. Pack Thickness; w/Standard Bed; wo/Rear Stabilizer Bar | |
| 2003 | Toyota | Tundra | RWD | 3.4L | V6 | Rear Right | Crew Cab Pickup; 3 Leaf / 1 Leaf; 1.875 In. Pack Thickness; w/Standard Bed |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.