1999 Toyota Tacoma Speaker Sizes and Audio System Guide
1999 Toyota Tacoma Speaker Sizes and Audio System Guide
This page covers the factory speaker locations, original speaker sizes, and key upgrade notes for the 1999 Toyota Tacoma. Equipment can vary by trim, body style, or audio package, so the speaker count and audio setup may differ from one truck to another. Factory amplifier details should be verified by trim and audio package, and selected audio systems may also include additional equipment if equipped.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 1999 Toyota Tacoma
Use this table as the main reference. Fitment depends on trim, factory audio package, mounting depth, and adapter availability.
Generic speaker location diagram. The table above shows the specific factory sizes for this vehicle. Exact location details may vary by body style and trim.
Recommended Speakers for the 1999 Toyota Tacoma
Selected aftermarket speakers that match the factory sizes for this vehicle. Always verify mounting depth, connector type, and audio package before ordering.
6.5" Speakers
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Speaker Count by Trim – 1999 Toyota Tacoma
Speaker count and audio equipment vary by trim and factory audio package. This table lists known configurations from our database.
| Trim | Speakers | Amplifier | Radio | Navigation |
|---|---|---|---|---|
| Limited V6 4x4 Xtracab 121.9 in. WB | 4 | – | – | – |
| Base 4x2 Regular Cab 103.3 in. WB | 2 | – | – | – |
| Base 4x2 Xtracab 121.9 in. WB | 2 | – | – | – |
| Base 4x4 Regular Cab 103.3 in. WB | 2 | – | – | – |
| Base 4x4 Xtracab 121.9 in. WB | 2 | – | – | – |
| Base V6 4x2 Xtracab 121.9 in. WB | 2 | – | – | – |
| Base V6 4x4 Xtracab 121.9 in. WB | 2 | – | – | – |
| PreRunner 4x2 Regular Cab 103.3 in. WB | 2 | – | – | – |
| PreRunner 4x2 Xtracab 121.9 in. WB | 2 | – | – | – |
| PreRunner V6 4x2 Xtracab 121.9 in. WB | 2 | – | – | – |
Data sourced from manufacturer specifications. Verify with the window sticker or dealer before ordering audio components.
Vehicle and Audio System Specifications
This block helps identify the vehicle and its audio system configuration for fitment decisions.
What Speakers Fit the 1999 Toyota Tacoma?
Aftermarket fitment should start with the factory speaker locations listed for this 1999 Toyota Tacoma, but diameter alone is not enough. The truck uses 6.5-inch full-range speakers in the front door and behind the seat, and trim equipment can vary from 2 to 4 speakers. Before buying, check mounting depth, bracket fit, connector type, and whether the vehicle has a factory audio package that changes the installation details.
Usually Safe Upgrades
- If your vehicle uses the front door location, a 6.5-inch full-range speaker is the factory size to compare against.
- If your vehicle uses the behind-seat location, a 6.5-inch full-range speaker is the factory size to compare against.
- If your truck has a 2-speaker setup, focus on the locations listed in the factory data rather than assuming every opening is populated.
- If your truck has a 4-speaker setup, verify each location individually before choosing replacement speakers.
Check Before Buying
- Measure mounting depth and compare it with the replacement speaker before ordering.
- Confirm the factory bracket and connector style at each speaker location.
- Check whether your trim uses a 2-speaker or 4-speaker audio layout, since equipment can vary.
- Factory amplifier details should be verified by trim and audio package before selecting speakers.
Installation Notes
The 1999 Toyota Tacoma uses 6.5-inch full-range speakers in the front doors and behind the seat, with total speaker count varying by trim from 2 to 4. Start by removing the interior panels carefully so you do not crack clips or mar the trim. Before disconnecting anything, verify the speaker wiring and note polarity, since factory audio equipment can vary by trim and audio package. Check speaker depth and mounting clearance before ordering replacements, especially in tighter locations behind the seat. Some aftermarket speakers may need mounting adapters to match the factory openings, and a harness adapter can help keep the wiring clean and reversible. If your vehicle has the factory subwoofer, confirm its wiring separately before changing the rest of the system. After installation, test each speaker at low volume first to confirm balance, fade, and correct operation before fully reassembling the panels.
Moderate difficulty, since panel removal, wiring checks, and fitment clearance all need careful attention.
Common Mistakes When Replacing Speakers
When shopping for speakers for a 1999 Toyota Tacoma, the biggest errors usually come from assuming every truck is wired the same or skipping fitment checks before ordering.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle. This Tacoma uses direct speaker-location data, and the speaker count can vary by trim and audio package, so verify the exact locations before you buy.
- Ignoring trim and audio package differences. The listed trims show 2-speaker and 4-speaker setups, so factory audio equipment should be checked by trim rather than assumed from the model year alone.
- Skipping mounting depth checks. A 6.5-inch speaker can still fail to fit properly if the depth is too great for the opening, so measure the available space before ordering.
- Overlooking connector style and wiring compatibility. Even when the speaker size matches, the factory connector may not match the new speaker, so confirm the connector type and be ready to adapt the wiring if needed.
- Assuming tweeters or a subwoofer are part of every Tacoma audio system. Tweeters are not listed here, and a factory subwoofer is not listed, so treat any extra audio equipment as if equipped and verify the vehicle before purchase.
- Reassembling the door or cab panels before testing the new speakers. Always test each speaker first so you can catch wiring issues, polarity problems, or fitment problems before everything is put back together.
Generation & Model Family
The 1999 Toyota Tacoma belongs to the First generation (N140/N150/N160/N170/N190) - Facelift (1999–2000) family. Nearby model years often share similar speaker locations and audio layouts, but exact fitment can vary by trim and audio package – verify before ordering.
Recommended Upgrade Path
The 1999 Toyota Tacoma uses a simple factory speaker layout, and equipment can vary by trim and audio package. That makes it a good candidate for targeted upgrades based on your goal, whether you want cleaner sound, more low-end output, or a more refined factory-style refresh. Start with the areas you hear most, then build from there.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, then add tweeters if equipped or if you are building a front-stage-focused system. | The front speakers do most of the work for vocals and detail, so improving them usually gives the biggest jump in clarity. If tweeters are part of your setup, upgrading the front stage together can help the highs and mids sound cleaner and more balanced. |
| More bass | Add an aftermarket subwoofer to complement the factory speakers and fill in the low end. | This Tacoma’s factory speaker layout is better suited to mids and highs than deep bass. Adding a subwoofer gives you the low-frequency output that the stock speakers cannot provide on their own, while keeping the rest of the system focused on clarity. |
| Louder sound | Properly matched speakers and amplifier integration can improve volume and reduce distortion. Verify factory amp or premium system integration before adding aftermarket amplifiers. | If you want more output, speaker sensitivity and amplifier matching matter as much as raw power. Checking how the factory audio system is configured first helps avoid integration problems and makes it easier to build a louder system that stays clean at higher volume. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers and the correct mounting brackets. | Front speakers usually deliver the most noticeable improvement for the money because they handle the sound you hear most often. Starting there keeps the upgrade focused and affordable, while still giving you a clear step up from worn factory speakers. |
| Factory look | Use same-size replacement speakers with the correct mounting brackets and harness adapters for a clean install that preserves the factory wiring and appearance. | This approach keeps the cabin looking original while refreshing the sound system. Matching the factory opening and using the right adapters helps maintain a neat installation and avoids unnecessary changes to the vehicle’s interior. |
Mounting Adapters and Wiring
The same nominal diameter does not guarantee a direct mount. Before ordering, confirm:
- Speaker depth: Aftermarket speakers often have larger magnets – measure available depth at each location.
- Mounting brackets: Door locations typically need a bracket or spacer to clear the window regulator and achieve correct mounting depth.
- Wiring harness adapters: Use a plug-and-play harness adapter to preserve factory wiring.
- Tweeter mounting cups: Replacing OEM tweeters may require surface-mount cups or brackets depending on the location.
- Factory or premium amplified systems: If the vehicle has a premium or factory-amplified audio system, confirm how the factory radio, amplifier, and speakers are connected before adding aftermarket amplifiers. Depending on the setup, a line output converter, DSP, integration harness, or professional installation may be needed.
- Connector type: Factory connectors vary by trim and model year – confirm compatibility before splicing or using an adapter.
Frequently Asked Questions
What size are the front door speakers in a 1999 Toyota Tacoma?
The front door speakers are 6.5-inch full-range units. This size is listed directly for the 1999 Tacoma and applies to the front door location.
What size are the rear speakers in a 1999 Toyota Tacoma?
The rear speaker location behind the seat uses 6.5-inch full-range speakers. Speaker count can vary by trim, but the listed rear size is 6.5 inches.
Does the 1999 Toyota Tacoma have a factory subwoofer?
A factory subwoofer is not listed for this model year. If equipped on a specific audio package, it should be verified by trim and factory audio equipment.
Do I need mounting adapters for speaker replacement?
Mounting adapter needs can depend on the speaker location and the replacement speaker design. The factory sizes are 6.5 inches, so checking the install hardware before buying is a good idea.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done without changing the radio. The factory radio setup varies by trim, so speaker choice should match the existing system and wiring.
Does the 1999 Toyota Tacoma have a factory amplifier?
Factory amplifier details should be verified by trim and audio package. The available trim data lists amplifier information as N/A, so it is best to confirm the exact system before planning upgrades.