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2004 Mazda 3

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 2004 Mazda 3

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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Cerwin-Vega PRD

1" Replacement Diaphragm for P1T, P175T, P1SRT Pro Mobile Tweeters

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1" Replacement Diaphragm for P1T, P175T, P1SRT Pro Mobile Tweeters

• 1" diaphragm for all Pro Mobile tweeters
• Applicable for models: P1T, P175T, P1SRT
• Does not fit Cerwin Vega P75T and P5T tweeters
• East to install, no cutting or drilling required
• Improves high‑frequency performance

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List price $47.99
-17% $39.99

In stock.

• 1" diaphragm for all Pro Mobile tweeters
• Applicable for models: P1T, P175T, P1SRT
• Does not fit Cerwin Vega P75T and P5T tweeters
• East to install, no cutting or drilling required
• Improves high‑frequency performance

Limitless Lithium LL-IR500A

500A Battery Isolator and Relay

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500A Battery Isolator and Relay

• 500-amp Relay and Battery Isolator
• High current isolation relay designed for adding a secondary battery
• Prevents primary battery discharge when the vehicle engine is off
• Maximum Contact Rating: 500 amps
• Mechanical Life Cycle: 100000

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$79.00

In stock

• 500-amp Relay and Battery Isolator
• High current isolation relay designed for adding a secondary battery
• Prevents primary battery discharge when the vehicle engine is off
• Maximum Contact Rating: 500 amps
• Mechanical Life Cycle: 100000

Crimestopper SP-302

2-Way Keyless Entry Car Alarm System with (1) 3000 ft Range 5-Button LCD Transmitter

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2-Way Keyless Entry Car Alarm System with (1) 3000 ft Range 5-Button LCD Transmitter

• 2-Way Paging Remote Car Starter
• 5-Button LCD Transmitter
• 3000 feet of range (0.56 miles)
• Full high speed 2-way data to data

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List price $199.95
-50% $99.99

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• 2-Way Paging Remote Car Starter
• 5-Button LCD Transmitter
• 3000 feet of range (0.56 miles)
• Full high speed 2-way data to data

Stinger SwitchHub (SPXSH440)

100A 4-Channel High Current Solid State Relay System

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100A 4-Channel High Current Solid State Relay System

• 4-Channel SwitchHub Solid-State Relay
• Single 40-amp output and triple 20-amp outputs
• 100-amp combined continuous capacity
• Outputs can be triggered independently

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List price $158.99
-13% $137.99

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Only 3 Left!

• 4-Channel SwitchHub Solid-State Relay
• Single 40-amp output and triple 20-amp outputs
• 100-amp combined continuous capacity
• Outputs can be triggered independently

NVX VCW122 Version 3 (VCW122v3)

2400W Peak (1200W RMS) 12" VC-Series v3 Dual 2-ohm Car Subwoofer

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2400W Peak (1200W RMS) 12" VC-Series v3 Dual 2-ohm Car Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 7.02"
• Sensitivity: 85 dB (1W/1m)

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95
List price $287.99
-17% $239.99

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SMD DD-1+

Distortion Detector/Analyzer

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Distortion Detector/Analyzer

• Check Gain Overlap Settings
• Input Voltage Capacity Raised to 200Vrms
• RMS AC Voltmeter Built-in

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List price $314.98
$304.98

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• Check Gain Overlap Settings
• Input Voltage Capacity Raised to 200Vrms
• RMS AC Voltmeter Built-in

NVX XW8BL20

20 ft 8-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

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20 ft 8-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

• 20 feet 8 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue

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-33% $29.99

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Only 3 Left!

NVX XAPK4

Full Spec 4 Gauge 100% (OFC) Oxygen Free Copper Amplifier Power Wiring Kit with Speaker Wire for Amplifiers up to 1500 Watts

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Full Spec 4 Gauge 100% (OFC) Oxygen Free Copper Amplifier Power Wiring Kit with Speaker Wire for Amplifiers up to 1500 Watts

• 4 Gauge Power Amplifier Installation Kit
• For Amplifiers Up To 1500 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 100 amp fuse
• CEA-2015 and BC5W2 Compliant

2+ offers available
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-24% $99.99

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Available Offers (2) for NVX XAPK4
15% off an NVX XCAP10H w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP10H Capacitor! No code needed — discount applies automatically at checkout.
15% off an NVX XCAP1F w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP1F Capacitor! No code needed — discount applies automatically at checkout.

NVX QBSTA

900W Peak (300W RMS) 11" Spare Tire Powered Subwoofer System with Remote Bass Knob

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900W Peak (300W RMS) 11" Spare Tire Powered Subwoofer System with Remote Bass Knob

• 11" Spare Tire Subwoofer System
• Built-In Class D Amplifier
• Top-mount amplifier controls
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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List price $323.99
-15% $274.99

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Used from: $179.00

• 11" Spare Tire Subwoofer System
• Built-In Class D Amplifier
• Top-mount amplifier controls
• Speaker-Level Inputs
• Wired Remote Bass Level Control

Hertz MPCX 2 TM.3 Single

Mille Pro Series Passive Audio Crossover

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Mille Pro Series Passive Audio Crossover

• Specifically developed for Hertz MP 70.3 and Hertz MP25.3
• Two-position (0 / +2 dB) switch for tweeter level adjustments
• Pure copper wire low series resistance inductors

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List price $90.00
-11% $79.99

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• Specifically developed for Hertz MP 70.3 and Hertz MP25.3
• Two-position (0 / +2 dB) switch for tweeter level adjustments
• Pure copper wire low series resistance inductors

Limited time!

NVX VAD11005 v2 (VAD11005v2)

1100W RMS Class D V-Series Full-Range 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

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1100W RMS Class D V-Series Full-Range 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

• 80 watts x 4 channel + 350 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Save 30% off an NVX XKIT46 Amp Kit at Checkout!
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-17% $349.99

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Deaf Bonce Apocalypse ATOM 1300.1 PRO

1300W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

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1300W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

• 490 watts x 1 channel @ 4 ohm
• 780 watts x 1 channel @ 2 ohm
• 1300 watts x 1 channel @ 1 ohm
• Total RMS Power: 1300 watts
• Class D 1 ohm Stable Monoblock Amplifier

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$199.90

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• 490 watts x 1 channel @ 4 ohm
• 780 watts x 1 channel @ 2 ohm
• 1300 watts x 1 channel @ 1 ohm
• Total RMS Power: 1300 watts
• Class D 1 ohm Stable Monoblock Amplifier

Belva BST808

Pair of 8 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

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Pair of 8 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

• Spade Terminals • 8 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

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-75% $2.49

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• Spade Terminals • 8 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

Fortin EVO-ONE

All-In-One Remote Starter, Alarm, Immobilizer Bypass and Data Interface Module

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All-In-One Remote Starter, Alarm, Immobilizer Bypass and Data Interface Module

• Easily Interface a Vehicle with an All-In-One Solution
• Preloaded Interface Module with Remote Start Technology
• Compatible with Most Protocols, RF-Kits and Telematic Modules
• Equipped with 5 Built-In Relays
• Hassle-Free Installation

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• Easily Interface a Vehicle with an All-In-One Solution
• Preloaded Interface Module with Remote Start Technology
• Compatible with Most Protocols, RF-Kits and Telematic Modules
• Equipped with 5 Built-In Relays
• Hassle-Free Installation

MTX Audio RT8PT

360W Peak (120W RMS) Loaded Single 8" Vented Amplified Bass Tube Enclosure

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360W Peak (120W RMS) Loaded Single 8" Vented Amplified Bass Tube Enclosure

• 8" Amplified Loaded Subwoofer System
• 120 watts RMS (360 watts Peak)
• Built-In amplifier
• Variable bass boost
• Speaker-Level Inputs
• EBC wired remote bass level control

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List price $219.95
-9% $199.95

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Used from: $119.97

• 8" Amplified Loaded Subwoofer System
• 120 watts RMS (360 watts Peak)
• Built-In amplifier
• Variable bass boost
• Speaker-Level Inputs
• EBC wired remote bass level control

Escort Redline 360c

Radar and Laser Detector with Android Auto and Apple CarPlay Support

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Radar and Laser Detector with Android Auto and Apple CarPlay Support

• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

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List price $899.99
-11% $799.95

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• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

JL Audio XB-BTU Battery Terminal

Universal (Positive or Negative) Battery Connector Terminal for 8 AWG to 1/0 AWG Power Wire Cable

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Universal (Positive or Negative) Battery Connector Terminal for 8 AWG to 1/0 AWG Power Wire Cable

• Works with power wire 8 gauge to 1/0 gauge
• Great for positive or negative connections to your battery
• Forged and machined 360 brass connection
• Elements and set screws have marine-grade, anti-corrosive Stannum plating

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$69.99

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• Works with power wire 8 gauge to 1/0 gauge
• Great for positive or negative connections to your battery
• Forged and machined 360 brass connection
• Elements and set screws have marine-grade, anti-corrosive Stannum plating

Rockford Fosgate Punch PEQ

Wired Bass/Treble Equalization Remote Controller for Select 2007-2025 Punch and Power Amplifiers

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Wired Bass/Treble Equalization Remote Controller for Select 2007-2025 Punch and Power Amplifiers

• Wired Bass/Treble Remote for select 2007-2025 Punch and Power amplifiers
• Controls bass on rear outputs of 4-channel amplifiers
• Conveniently mount under dash, inside center console or glovebox

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$49.99

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• Wired Bass/Treble Remote for select 2007-2025 Punch and Power amplifiers
• Controls bass on rear outputs of 4-channel amplifiers
• Conveniently mount under dash, inside center console or glovebox

Metra IBWRD00

Dual 1/0-Gauge to Single 1/0 Gauge Input Wire Reducers

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Dual 1/0-Gauge to Single 1/0 Gauge Input Wire Reducers

• Dual 1/0-gauge input and output to 1/0-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

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List price $49.99
-10% $44.99

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Ships in 10-14 days

• Dual 1/0-gauge input and output to 1/0-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

NVX XWS1625

25 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

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25 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

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-50% $14.99

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• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

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    FAQ for Universal-Fit Audio & Electronics in 2004 3

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2004 Mazda 3?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 3.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.