For the classic 4Runners supported by Preserve Rad, the generation split is straightforward: 1984–1989 is the first generation and 1990–1995 is the second generation. The two generations share Toyota truck DNA but differ substantially in body construction, suspension details, interior parts and many drivetrain applications.
Generation Chart
| Generation | Years | Fast identification cue |
|---|---|---|
| 1st Gen 4Runner | 1984–1989 | Two-door body with removable rear fiberglass top |
| 2nd Gen 4Runner | 1990–1995 | Fixed-roof SUV body; four-door configuration became the familiar layout |
1984–1989 First Generation
The first-generation 4Runner is closely tied to the Toyota Pickup of the same era and is easy to recognize by its removable rear top. One major fitment split occurs inside the generation: factory 1984–1985 4Runners use a solid front axle, while 1986–1989 models use independent front suspension.
That front-suspension change affects steering, hubs, axle parts, suspension components, lift systems and brake-related hardware. See our 1st Gen 4Runner Solid Axle vs. IFS Guide for a detailed breakdown.
1990–1995 Second Generation
The second-generation 4Runner moved to a more conventional fixed-roof SUV body and expanded passenger access. Fitment within this generation can still depend on engine, drivetrain, transmission, production date and brake package. The 1991 brake system is a good example of why production month can matter on certain components.
Browse 1990–1995 Toyota 4Runner parts and accessories, or narrow the catalog to suspension and steering, brakes or drivetrain parts. See our 1991 4Runner Brake Production-Date Guide when working on a 1991 truck.
Engine and Drivetrain Identification Still Matter
Generation tells you which broad vehicle family you have, but it does not replace engine and drivetrain identification. First-generation trucks can be 22R, 22RE, 22R-TE or 3VZ-E depending on year and configuration. Second-generation models commonly use four-cylinder or V6 drivetrains. Swaps are also common.
Before Ordering 4Runner Parts
- Confirm 1984–1989 first generation or 1990–1995 second generation.
- Confirm engine.
- Confirm 2WD or 4WD where applicable.
- For a first-generation truck, identify solid axle vs. IFS.
- Identify manual or automatic transmission for drivetrain parts.
- Check production month when the product listing shows a date split.
- Match modified vehicles to the installed hardware.
Shop by 4Runner Generation
1984–1989 1st Gen 4Runner Parts
1990–1995 2nd Gen 4Runner Parts
If you are unsure which components are original, use Fitment Help and include the year, engine, drivetrain, transmission and clear photos.