1999 Nissan Sentra Speaker Sizes and Audio System Guide
1999 Nissan Sentra Speaker Sizes and Audio System Guide
This page covers the factory speaker locations, original speaker sizes, and the key notes you need before planning an upgrade for the 1999 Nissan Sentra. Equipment can vary by trim, body style, or audio package, so factory amplifier details should be verified by trim and audio package. Selected audio systems may also include additional equipment if equipped, which can change what you find behind the panels.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 1999 Nissan Sentra
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 Nissan Sentra
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 Nissan Sentra
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 |
|---|---|---|---|---|
| GXE 4dr Sedan | 4 | – | – | – |
| GXE 4dr Sedan | 4 | – | – | – |
| SE 4dr Sedan | 4 | – | – | – |
| SE-L 4dr Sedan | 4 | – | – | – |
| XE 4dr Sedan | 4 | – | – | – |
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 Nissan Sentra?
Aftermarket fitment should start with the factory speaker locations listed above, but diameter alone is not enough. Check mounting depth, bracket fit, connector type, and whether the vehicle has a premium or factory-amplified audio system. On this 1999 Nissan Sentra, the listed factory speaker sizes give you a starting point, but the final choice still depends on the exact installation space and trim equipment. Selected audio systems may also include additional equipment if equipped, so verify the vehicle before ordering.
Usually Safe Upgrades
- If your vehicle uses the front door 6.5 inch full-range location, a 6.5 inch aftermarket speaker is the first size to compare.
- If your vehicle uses the rear deck corner 6.5 inch full-range location, a 6.5 inch aftermarket speaker is the first size to compare.
- If your vehicle has a 4-speaker layout, matched full-range replacements for the listed locations are the safest starting point.
- If your vehicle has a factory subwoofer if equipped, keep in mind that the subwoofer location is separate from the main speaker openings.
Check Before Buying
- Confirm the speaker location before ordering, since front door and rear deck corner openings can have different mounting requirements.
- Measure mounting depth and opening clearance so the new speaker will sit correctly behind the panel or grille.
- Check the connector style and wiring condition, especially if the vehicle has been modified over time.
- Verify trim and audio package details, because factory amplifier details should be verified by trim and audio package.
- If you are replacing all speakers, compare the listed 4-speaker layout with the parts already in the vehicle to make sure the system matches the data.
Installation Notes
This 1999 Nissan Sentra uses 6.5-inch full-range speakers in the front doors and rear deck corners, with a 4-speaker layout listed for the sedan trims. Installation usually starts with careful panel removal so you can access the factory speaker locations without damaging clips or trim pieces. Before buying speakers, check mounting depth and basket clearance, since older vehicles can have limited space behind the door panel or rear deck opening. Speaker wiring should be handled carefully, and a harness adapter is a smart choice to avoid cutting the factory wiring. Mounting adapters may also be needed to match the original openings and help new speakers sit correctly. If you are upgrading the radio at the same time, verify the wiring connections before final assembly. After each speaker is installed, test balance, fade, and polarity before reinstalling all panels. Factory amplifier details should be verified by trim and audio package.
Moderate difficulty, since panel removal, wiring checks, and fitment measurements all matter on an older vehicle.
Common Mistakes When Replacing Speakers
When shopping for speakers for a 1999 Nissan Sentra, the biggest errors usually come from assuming every car is the same instead of checking the actual audio layout and trim details.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle.
- Ignoring trim and audio package differences, since speaker count, radio setup, and related equipment can vary by trim.
- Choosing speakers without confirming mounting depth and overall clearance behind the front door and rear deck openings.
- Overlooking connector and wiring compatibility, which can turn a simple speaker swap into extra adapter or wiring work.
- Assuming tweeters or a factory subwoofer are present when they are not listed, instead of verifying whether those items are actually equipped.
- Skipping a test fit and sound check before reassembly, which can hide fitment issues or wiring mistakes until the panels are already back on.
Generation & Model Family
The 1999 Nissan Sentra belongs to the Fourth generation (B14) - Facelift (1999–1999) 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
This 1999 Nissan Sentra uses a simple 4-speaker layout, so the biggest gains usually come from replacing the front stage first and then building out from there. Equipment can vary by trim and audio package, so it is smart to verify the radio and any factory amplifier details before planning upgrades. A focused approach can improve clarity, bass, and overall output without overcomplicating the system.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, then add tweeters if equipped or use a front-stage setup that improves midrange and high-frequency detail. | The front speakers do most of the work for vocals and instruments, so improving them gives the cleanest jump in clarity. If tweeters are part of the audio setup, a better front-stage upgrade can sharpen highs and improve stereo imaging. |
| More bass | Add an aftermarket subwoofer to complement the factory speakers and keep the rest of the system focused on mids and highs. | The listed speaker layout does not include a factory subwoofer, so adding one is the most effective way to increase low-end output. This lets the main speakers handle detail while the subwoofer covers deeper bass. |
| Louder sound | Use properly matched speakers and amplifier integration to improve volume and reduce distortion, and verify factory amp or premium system integration before adding aftermarket amplifiers. | Higher output can sound harsh if the system is not matched correctly, so speaker and amplifier pairing matters. Checking the factory audio setup first helps avoid integration problems and keeps the upgrade balanced. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers and the correct mounting brackets. | The front doors are the most-used speakers in daily driving, so this gives the best value for the money. Starting there improves the sound you hear most often without requiring a full system overhaul. |
| 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 still improving sound quality. It also helps maintain the factory wiring layout and makes the upgrade look intentional rather than modified. |
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 Nissan Sentra?
The front door speakers are 6.5-inch full-range units. Speaker data for this model year is listed directly for the 1999 Sentra sedan.
What size are the rear speakers in a 1999 Nissan Sentra?
The rear deck corner speakers are 6.5-inch full-range units. This size is listed in the direct speaker data for the 1999 Sentra.
Does the 1999 Nissan Sentra 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 equipment.
Do I need mounting adapters to replace the speakers?
Mounting adapters may be needed depending on the replacement speaker design and the vehicle’s factory openings. Check the speaker depth, mounting pattern, and trim clearance before ordering.
Can I replace the speakers without replacing the radio?
Yes, speaker replacement can be done without replacing the radio. The factory radio setup varies by trim, so confirm compatibility with the existing system before choosing new speakers.
Does the 1999 Nissan Sentra 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 or not listed.