1991 Toyota 4Runner Speaker Sizes
The 1991 Toyota 4Runner factory audio system features dashboard, front door panel, and rear door panel locations that accommodate 4 inch speakers, while the rear side panel accepts a 5.25 inch speaker size. Additionally, the front door panel and rear support 6.5 inch units. Compatible types for an audio replacement and upgrade consist of midrange, midbass, and full-range options.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Front Door Panel | 4 | Midrange |
|
| Rear | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 4 | Midrange |
|
| Rear Side Panel | 5.25 | Midbass / Full-Range |
|
1991 Toyota 4Runner Speaker Replacement Summary
6
total positions
3
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 3 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 3 Low: 11991 Toyota 4Runner Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 1991 Toyota 4Runner accommodates multiple speaker sizes across different locations, with 4-inch positions in the dashboard and door panels, 5.25-inch openings in the rear side panels, and 6.5-inch slots in the front door panels and rear location.
- Midrange speakers fit the 4-inch positions throughout the vehicle, while midbass or full-range speakers work with the larger 5.25-inch and 6.5-inch locations, suggesting a multi-stage speaker configuration.
- The front door panels accept both 4-inch midrange and 6.5-inch midbass or full-range speakers, indicating potential dual speaker mounting points or alternative installation options in this location.
- The 1991 Toyota 4Runner supports both single DIN and double DIN radio installations, providing flexibility for aftermarket head unit upgrades alongside speaker replacements.
- The rear audio configuration includes 4-inch door panel speakers, 5.25-inch side panel speakers, and 6.5-inch rear speakers, creating multiple upgrade paths for enhancing bass response and overall audio output.
- Full-range speakers offer a single-component solution for the 5.25-inch and 6.5-inch locations, while component systems might utilize the 4-inch midrange positions in conjunction with separate tweeters for improved frequency separation.
- The variety of speaker sizes and types suggests that prioritizing the 6.5-inch locations could yield more substantial improvements in low-frequency reproduction compared to upgrading the smaller 4-inch midrange positions alone.