Metra 70-8121 Amp Bypass Harness for Toyota Tundra

Metra 70-8121 is a factory amplifier bypass wiring harness for select Toyota Tundra vehicles. It is designed for aftermarket radio installations that need to interface with or bypass the factory amplifier or retained factory system functions.

At a Glance

• Factory amplifier bypass wiring harness for select Toyota Tundra vehicles
• Plugs into the original radio connectors and factory amplifier where compatible
• Harness length is 204 inches with 8-inch power harness
• Factory subwoofer is not retained in select vehicles
• Color-coded leads connect to the aftermarket radio

System / Wiring Notes

• Must have tweeters in the front doors
• Factory subwoofer is not retained in select vehicles
• Verify factory amplifier and speaker configuration before installation

Exact Vehicle Compatibility

Find your vehicle below, then match the model year and factory-equipment details in the same row. Factory radio, amplifier, navigation, trim, speaker location, and connector differences can change which installation parts are required. If anything differs, contact MCOR before ordering.

Fitment note: Year and model alone are not always enough to confirm compatibility. Match every factory-equipment qualifier shown for your vehicle, and contact MCOR Automotive if the radio, amplifier, navigation, speaker, camera, trim, or connector details are uncertain.

Installation Notes

• Confirm exact vehicle fitment, factory audio system, trim level, and radio connector before installation
• Retained features and amplifier behavior depend on the vehicle's original equipment and installation setup
• Additional installation parts may be required depending on the aftermarket radio and vehicle configuration
• Professional installation is recommended for best results
• Check the manufacturer's instructions and vehicle fit guide before installation

What's in the Box

• Amp bypass harness

Technical Specifications

• Brand: Metra
• Model: 70-8121
• Product Type: Factory amplifier bypass wiring harness
• Application: select Toyota Tundra vehicles
• Compatibility Type: Vehicle-specific
• Harness Length: 204 inches
• Power Harness Length: 8 inches
• Factory Subwoofer: Not retained in select vehicles

Identifiers & Packaging

• MPN: 70-8121
• UPC: 086429339846
• Sold As: Each
• Included Components: Amp bypass harness

Why Buy From MCOR Automotive

• Authorized retailer for the brands we sell
• Specialists in vehicle audio integration, radio replacement parts, and installation accessories
• 22+ years of professional automotive electronics experience
• Expert support for compatibility verification and proper setup