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2003 BMW M3

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 2003 BMW M3

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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4 Pack of 80 Amp Nickel-Plated MANL Fuse (Belva BMANL80)

Four fuses per order. High quality 80 Amp MANL Fuses

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Four fuses per order. High quality 80 Amp MANL Fuses

• 80A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

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• 80A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

DS18 EN-JS8/BK (Sold by Pair)

Empty Single 8" Universal Flat Mount Kick Panel Speaker Pods in Black with RGB LED

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Empty Single 8" Universal Flat Mount Kick Panel Speaker Pods in Black with RGB LED

• Pair of 8" universal flat mount kick panel speaker pods in black
• Durable high-density and durable plastic construction
• Enclosure houses 1 8" coaxial speaker
• IP36 and UV rated, all elements ready
• Speakers sold by pair

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$214.95

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• Pair of 8" universal flat mount kick panel speaker pods in black
• Durable high-density and durable plastic construction
• Enclosure houses 1 8" coaxial speaker
• IP36 and UV rated, all elements ready
• Speakers sold by pair

NVX - Worth the Envy - Direct to Consumer Car Audio

Stinger SSCB200

Stinger Select 200 Amp Circuit Breaker

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Stinger Select 200 Amp Circuit Breaker

• High Current Transfer
• Stinger Select 200 Amp Circuit Breaker
• Manual Trip Reset
• High Current Protection

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• High Current Transfer
• Stinger Select 200 Amp Circuit Breaker
• Manual Trip Reset
• High Current Protection

NVX VAD10001 v2 (VAD10001v2)

2000W Peak (1000W RMS) Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote (Marine Certified)

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2000W Peak (1000W RMS) Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote (Marine Certified)

• 420 watts x 1 channel @ 4 ohm
• 760 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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NVX XWS1250

50 ft 12-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

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50 ft 12-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

• True Spec 12 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Translucent EnvyFlex flexible multi-strand construction

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• True Spec 12 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Translucent EnvyFlex flexible multi-strand construction

Stinger SGW9920

20 ft. 18 Gauge 9 Conductor Speed Speaker Wire

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20 ft. 18 Gauge 9 Conductor Speed Speaker Wire

• 20 ft. 18 Gauge 9 Conductor Speed Speaker Wire
• Great for a 4-channel amplifier setup
• EIA standard easy color-coded copper wires
• Easy and fast installations
• Color: Blue

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• 20 ft. 18 Gauge 9 Conductor Speed Speaker Wire
• Great for a 4-channel amplifier setup
• EIA standard easy color-coded copper wires
• Easy and fast installations
• Color: Blue

JL Audio XB-SPTM Side-Post Battery Terminal Adaptors

1 Pair Side-Post to Top-Mount Battery Terminal Adapters

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1 Pair Side-Post to Top-Mount Battery Terminal Adapters

• 1 Pair (1 negative, 1 positive) of. Side-Post to Top-Mount Battery Terminal Adapters
• Forged and machined brass construction
• Marine-grade, anti-corrosive Stannum plating

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• 1 Pair (1 negative, 1 positive) of. Side-Post to Top-Mount Battery Terminal Adapters
• Forged and machined brass construction
• Marine-grade, anti-corrosive Stannum plating

Crimestopper SPLCD-52

2-Way 5-Button Remote Start Keyless Entry Replacement LCD Remote

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2-Way 5-Button Remote Start Keyless Entry Replacement LCD Remote

• 2-Way 5-Button Replacement LCD Remote
• Up to 3000 feet of range (0.56 miles)
• Replacement remote for SP-502

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• 2-Way 5-Button Replacement LCD Remote
• Up to 3000 feet of range (0.56 miles)
• Replacement remote for SP-502

JBL Stage 122 (JBLSUBST122AM)

1000W Peak (250W RMS) 12" Stage Series Single 4-ohm Car Subwoofer

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1000W Peak (250W RMS) 12" Stage Series Single 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 6"
• Sensitivity: 91 dB

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-15% $109.95

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JL Audio XD-AICDO-3

3-Foot Digital Optical Audio Cable with Toslink Connectors

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3-Foot Digital Optical Audio Cable with Toslink Connectors

•Digital Optical Audio Connection Cable
• Digital Optical Audio Connection Cable
• Built-in Toslink Connectors
• Length: 3 feet

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•Digital Optical Audio Connection Cable
• Digital Optical Audio Connection Cable
• Built-in Toslink Connectors
• Length: 3 feet

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NVX VAD22008 v2 (VAD22008v2)

2200W RMS Class D V-Series 8-Channel Car, Marine and Powersports Amplifier

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2200W RMS Class D V-Series 8-Channel Car, Marine and Powersports Amplifier

• 150 watts x 6 channel + 250 watts x 2 channels @ 4 ohm
• 225 watts x 6 channel + 400 watts x 2 channels @ 2 ohm
• Bridged: 450 watts x 3 channel + 850 watts x 1 channel @ 4 ohm
• Total RMS Power: 2200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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• 150 watts x 6 channel + 250 watts x 2 channels @ 4 ohm
• 225 watts x 6 channel + 400 watts x 2 channels @ 2 ohm
• Bridged: 450 watts x 3 channel + 850 watts x 1 channel @ 4 ohm
• Total RMS Power: 2200 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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NVX QB12SPA

1200W Peak (350W RMS) Single 12" Amplified Ported Loaded Subwoofer Enclosure with Remote Bass Knob

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1200W Peak (350W RMS) Single 12" Amplified Ported Loaded Subwoofer Enclosure with Remote Bass Knob

• 12" Amplified Loaded Subwoofer System
• 350 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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• 12" Amplified Loaded Subwoofer System
• 350 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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Kicker CXA400.1 (46CXA4001T)

400W RMS Class D CX-Series Monoblock Car Amplifier

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400W RMS Class D CX-Series Monoblock Car Amplifier

• 150 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• 400 watts x 1 channel @ 1 ohm
• Total RMS Power: 400 watts
• Class D 1 ohm Stable Monoblock Amplifier

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NVX MVPA4

1200W Peak (600W RMS) Class D Marine-V Series 4-Channel Marine/Powersports/Motorcycle Amplifier

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1200W Peak (600W RMS) Class D Marine-V Series 4-Channel Marine/Powersports/Motorcycle Amplifier

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Save 30% off an NVX XKIT84 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT84 Amp Kit! No code needed — discount applies automatically at checkout.
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XS Power XP950

950W 35 Ah Absorbent Glass Mat (AGM) Secondary Battery

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950W 35 Ah Absorbent Glass Mat (AGM) Secondary Battery

• 12-volt Absorbent Glass Mat (AGM) Secondary Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 950W car audio stereo systems
• Compatible with most vehicle applications

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• 12-volt Absorbent Glass Mat (AGM) Secondary Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 950W car audio stereo systems
• Compatible with most vehicle applications

JL Audio MMC-6

6 ft. MediaMaster remote controller cable

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6 ft. MediaMaster remote controller cable

• Media Master Remote controller cable
• 6-foot Extension Cable

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$34.99

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• Media Master Remote controller cable
• 6-foot Extension Cable

JL Audio JD500/1

500W RMS Class D JD Series Monoblock Car Amplifier

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500W RMS Class D JD Series Monoblock Car Amplifier

• 250 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier

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Cobra RAD 480i

Radar and Laser Detector with Bluetooth and App Control

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Radar and Laser Detector with Bluetooth and App Control

• Multiple Band Radar and Laser Detector
• Long range detection
• 2nd generation false alarm filtering
• Built-in Digital Signal Processing (DSP)
• Sensitivity (SEN) button
• Defender database

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• Multiple Band Radar and Laser Detector
• Long range detection
• 2nd generation false alarm filtering
• Built-in Digital Signal Processing (DSP)
• Sensitivity (SEN) button
• Defender database

NVX XLOC66X

6 Input / 6 Output Line Output Converter with Impedance Matching and Remote Level Control

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6 Input / 6 Output Line Output Converter with Impedance Matching and Remote Level Control

• 6-Channel Speaker Level Inputs
• 6-Channel RCA Outputs
• Handles up to 40V (400 watts RMS)
• Provides up to 9.5 Volts of output
• Auto turn-on via DC offset or Audio detection 
• Load selection switch (20, 60, or 20K ohm)
• Wired remote bass level control included
• LED Clip indicator

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• 6-Channel Speaker Level Inputs
• 6-Channel RCA Outputs
• Handles up to 40V (400 watts RMS)
• Provides up to 9.5 Volts of output
• Auto turn-on via DC offset or Audio detection 
• Load selection switch (20, 60, or 20K ohm)
• Wired remote bass level control included
• LED Clip indicator

Limited time!

NVX XTGSP2

Tone Generator and Speaker Polarity Tester

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Tone Generator and Speaker Polarity Tester

• Tone Generator • Speaker Polarity Tester
• Perfect Troubleshooting and Testing
• Output Range of 0-8 Volts
• Includes RCA and Alligator Clips
• 9V Speaker Popper • Auto Shutoff

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• Tone Generator • Speaker Polarity Tester
• Perfect Troubleshooting and Testing
• Output Range of 0-8 Volts
• Includes RCA and Alligator Clips
• 9V Speaker Popper • Auto Shutoff

Metra IBR146

SAE Top Post Battery Terminals (Sold as Pair)

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SAE Top Post Battery Terminals (Sold as Pair)

• SAE Top Post Battery Terminals
• Pair of positive or negative battery clamps
• Top-mounted or side-mounted options
• Machined brass construction with satin chrome finish

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List price $53.99
-11% $47.99

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• SAE Top Post Battery Terminals
• Pair of positive or negative battery clamps
• Top-mounted or side-mounted options
• Machined brass construction with satin chrome finish

Crimestopper SP-402

1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

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1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

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• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

Energie PR4800

12V 110Ah Absorbent Glass Mat (AGM) Car Battery

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12V 110Ah Absorbent Glass Mat (AGM) Car Battery

• 12-volt Absorbent Glass Mat Car Audio Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 4800W car audio stereo systems
• Left positive terminal

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• 12-volt Absorbent Glass Mat Car Audio Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 4800W car audio stereo systems
• Left positive terminal

Metra 44-EC6R Antenna Extension

6" Universal Antenna Extension Cable with Right Angle Male

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6" Universal Antenna Extension Cable with Right Angle Male

• Universal Antenna Extender
• Extends Antenna 6" (.5 ft.)
• Right Angle Male Connector

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• Universal Antenna Extender
• Extends Antenna 6" (.5 ft.)
• Right Angle Male Connector

Stinger SVMR

Red LED Voltage Display

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Red LED Voltage Display

• Red LED Voltage Display
• Universal Mounting
• Monitor System Voltage
• Easy Installation

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• Red LED Voltage Display
• Universal Mounting
• Monitor System Voltage
• Easy Installation

Sundown Audio U-6.5SW D4 6.5" (U65SWD4)

1000W Peak (500W RMS) 6.5" U Series Dual 4-ohm Car Subwoofer (SW-UV16.5D4)

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1000W Peak (500W RMS) 6.5" U Series Dual 4-ohm Car Subwoofer (SW-UV16.5D4)

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 5.71"
• Sensitivity: 78.14 dB

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List price $239.99
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2 Pack of 100 Amp Nickel-Plated ANL Fuse (Belva BANL100)

Two fuses per order. High quality 100 Amp ANL Fuses

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Two fuses per order. High quality 100 Amp ANL Fuses

• 100A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

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• 100A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

JL Audio XD-BTS Battery Terminal

Ultra-Compact Universal Brass Battery Connector Terminal with Marine-Grade Stannum Plating - Positive or Negative

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Ultra-Compact Universal Brass Battery Connector Terminal with Marine-Grade Stannum Plating - Positive or Negative

• Ultra-Compact Battery Connector, Positive or Negative
• 10 - 4 Gauge
• High-Temperature Polycarbonate Cover
• Marine-Grade Stannum Plating

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• Ultra-Compact Battery Connector, Positive or Negative
• 10 - 4 Gauge
• High-Temperature Polycarbonate Cover
• Marine-Grade Stannum Plating

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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• 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

Escort MAX 360c MKII (360cmkii)

Radar and Laser Detector with Wi-Fi, GPS, Bluetooth, and App Control

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Radar and Laser Detector with Wi-Fi, GPS, Bluetooth, and App Control

• Multi Band Radar and Laser Detector
• Works with Apple CarPlay and Android Auto
• AutoLearn Intelligence GPS-based technology
• Dual-band Wi-Fi for software updates
• True 360-degree awareness
• Variable speed sensitivity
• Supports Drive Smarter software
• M2 and Shifter compatible

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• Multi Band Radar and Laser Detector
• Works with Apple CarPlay and Android Auto
• AutoLearn Intelligence GPS-based technology
• Dual-band Wi-Fi for software updates
• True 360-degree awareness
• Variable speed sensitivity
• Supports Drive Smarter software
• M2 and Shifter compatible

Escort MAX 360 MKII

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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• 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

Viper 7654V (Requires Programming)

Responder LC3/HD Replacement Companion Remote Control Compatible with Viper 5501, 5901 and 7901

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Responder LC3/HD Replacement Companion Remote Control Compatible with Viper 5501, 5901 and 7901

• Replacement Companion Remote Control
• White and Black Design
• 5 Rubberized Buttons
• Super Code 1-Way LE Transmitter
• Confirms the Commands you Send to the Vehicle with Bright LEDs
• Uses the 2016 3V Round Lithium Battery

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• Replacement Companion Remote Control
• White and Black Design
• 5 Rubberized Buttons
• Super Code 1-Way LE Transmitter
• Confirms the Commands you Send to the Vehicle with Bright LEDs
• Uses the 2016 3V Round Lithium Battery

Alpine RUE-4360

Wireless Audio Remote Control for Remote-Ready Alpine Stereos

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Wireless Audio Remote Control for Remote-Ready Alpine Stereos

• Wireless remote control for remote-ready Alpine stereos
• 20 soft push-buttons for variety of control functions
• Siri voice assistant activation on paired iPhone
• Voice recognition mode when paired with other smartphones
• Utilizes IR (Infrared) to send commands wirelessly

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• Wireless remote control for remote-ready Alpine stereos
• 20 soft push-buttons for variety of control functions
• Siri voice assistant activation on paired iPhone
• Voice recognition mode when paired with other smartphones
• Utilizes IR (Infrared) to send commands wirelessly

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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• 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

Belva 1.0 Farad Capacitor

1.0 Farad Capacitor with Digital Red Display

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1.0 Farad Capacitor with Digital Red Display

• 1.0 Farad Power Capacitor
• Perfect for Systems up to 1000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

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• 1.0 Farad Power Capacitor
• Perfect for Systems up to 1000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

Limited time!

NVX VCW154v3RC

Recone Kit for VCW154v3 Version 3 Subwoofers

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Recone Kit for VCW154v3 Version 3 Subwoofers

• Kits are assembled to ensure perfect fitment and alignment
• Each kit includes all new soft moving parts
• Impedance: Dual 4-ohm
• CA glue adhesive is NOT included

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• Kits are assembled to ensure perfect fitment and alignment
• Each kit includes all new soft moving parts
• Impedance: Dual 4-ohm
• CA glue adhesive is NOT included

Limited time!

JL Audio BassWedge CP110-W0v3

Single 10" BassWedge Loaded Ported Enclosure with Gray Carpet Finish

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Single 10" BassWedge Loaded Ported Enclosure with Gray Carpet Finish

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

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• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

Sound Extreme by ECOXGEAR SEB26 (GDI-EXSEB2601)

500W Peak 28” Elite Series 8-Speaker Amplified Bluetooth Soundbar with Battery Charger

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500W Peak 28” Elite Series 8-Speaker Amplified Bluetooth Soundbar with Battery Charger

• Peak Power: 500 watts
• Built-in D amplifier
• Weatherproof IPX-66 rating enclosure
• (4) 2-1/4" Mid-range front speakers
• (2) 2-1/4" Mid-range rear speakers
• (2) 1" tweeters
• (2) 4" side-mounted woofers
• AUX input for smartphones and MP3
• Dimensions: 27-3/8" W x 5-5/8" H x 6-1/2" D

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• Peak Power: 500 watts
• Built-in D amplifier
• Weatherproof IPX-66 rating enclosure
• (4) 2-1/4" Mid-range front speakers
• (2) 2-1/4" Mid-range rear speakers
• (2) 1" tweeters
• (2) 4" side-mounted woofers
• AUX input for smartphones and MP3
• Dimensions: 27-3/8" W x 5-5/8" H x 6-1/2" D

Limited time!

Belva BCCAP22 (CC2218)

22/18 Gauge Nylon Crimp Cap 100 Pack

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22/18 Gauge Nylon Crimp Cap 100 Pack

• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 100

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• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 100

Infinity Reference 10001A (AMPRF10001AAM)

1000W Reference Class D Reference Series Monoblock Car Amplifier with Remote Bass

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1000W Reference Class D Reference Series Monoblock Car Amplifier with Remote Bass

• 600 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier

2+ offers available
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FREE NVX Amp Kit at Checkout!
Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.
NVX - Worth the Envy - Direct to Consumer Car Audio

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    FAQ for Universal-Fit Audio & Electronics in 2003 M3

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 BMW M3?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your M3.

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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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