Metra 72-8104: The Multi-Brand Door Speaker Harness
Quick answer / TL;DR: The Metra 72-8104 is the speaker harness for the select 1988-2025 Toyota, Scion, Lexus and related models, carrying the factory door connector to the replacement speaker's leads. It is the two-pin door harness in the common case – the positive and the negative on the pair – and the install is the plug transferred from the door to the harness, the new speaker crimped to the harness's leads, the door's wiring uncut. The fit list is the manufacturer's survey, and the door's own connector is the check that confirms it.
The Metra 72-8104 is the door speaker harness that the Toyota-family upgrade runs through, and it is the part number that appears in the install threads when the door speaker comes out and the new one needs the factory plug carried to it. It is a multi-brand part – the manufacturer's fit list spans the select Toyota, Scion, Lexus, Honda, Hyundai, Mitsubishi, Pontiac and Subaru models from the late 1980s into the 2020s – and the common case is the door speaker swap on the car that the factory wired with the two-pin door connector.
This is the part view: what the 72-8104 connects, the pins it carries, the fit list and how to read it, and the place it holds in the harness family.
What the 72-8104 Connects
| End | The connector | Carries |
|---|---|---|
| Door end | The factory-style door plug, the two-pin form in the common case | The vehicle's door wire, terminated at the factory |
| Speaker end | The bare leads, crimped to the replacement speaker | The signal to the new driver |
| The pair between | The 18 to 16 AWG conductors, insulated | The positive and the negative, the polarity held in the pair |
The harness is the bridge between the two ends the install has in front of it: the door's wiring, which the factory terminated in its plug and which the upgrade leaves intact, and the replacement speaker, which arrives with the bare leads and no connector of its own. The 72-8104 carries the door's plug form on one end – the socket that the door's plug seats into – and the bare leads on the other, the conductors the new speaker's terminals are crimped to. The pair between is the in-vehicle gauge, the 18 to 16 AWG that serves the short run from the door's location to the speaker's baffle. The part is the transfer piece: the door's connector stays alive on the harness, the speaker's leads meet it at the crimp, and the wire the factory loomed is never cut.
The pins, the two-voice pair
The common form of the 72-8104 is the two-pin door harness: the door's plug presents the two positions, the positive and the negative of the speaker pair, and the harness maps them to the two leads at the speaker end. The two-voice simplicity is what makes the swap fast – the plus lead to the plus position, the minus to its partner, the crimp on each – and it is the form the door's own connector confirms. Where the vehicle's door loom carries the four positions, the harness family's four-pin sibling is the part, and the 72-8104 in its common form is the two. The pin check at the door is the step that keeps the two forms apart, because the count is read from the socket, not assumed from the year.
The Fit List, and How to Read It
The manufacturer's fit list for the 72-8104 spans the select models from the 1988-2025 window: the Toyota line as the core, with the Scion, Lexus, the 1998-2002 Honda Passport, the select Hyundai, Isuzu, Mitsubishi, Pontiac and Subaru models that the factory wired with the same door connector. The list is long because the connector is common – the door's two-pin socket is the shared hardware across the brands that the platform or the parts bin brought together – and the list is the survey that says which vehicles carry that socket. The reading that matters is the physical one: the door's plug comes out, the pins are counted and the positions checked, and the socket the plug came from is the confirmation. The list shortens the search; the socket confirms the part.
Why one number serves the many-year span
The 1988-2025 span on a single part number is the connector's longevity, not the harness's. The factory's door speaker connector – the two-pin socket and its plug – was the standard across the model years, and the harness that carries that plug form serves every year the socket survived. The change that ends the span is the connector change: the model year that the factory moved to the different socket, the different pin count or the different assignment, is the year the sibling part number begins. The 72-8104's long fit list is the statement that the socket did not change across those years, and the check at the door is the statement that it did not change on this car.
The Place It Holds in the Family
| Part | The role | The search that finds it |
|---|---|---|
| 72-8104 | The door speaker harness, the Toyota-family common case | The part number from the install guide |
| The bracket siblings | The mounting plates for the speaker swap | The size-gap search, the 82 series |
| The Ford and Mazda siblings | The door harnesses for that platform's connectors | The brand-and-vehicle search |
| The four-pin siblings | The loomed doors with the separate leads | The pin-count search |
The family view is what the part-number search is inside: the 72-8104 is the door harness for its connector, the bracket line is the mounting plates for the size gap, and the sibling harnesses are the door plugs for the other platforms. The family is indexed by the connector – the plug form and the pinout – and each part number is one connector's harness. The 72-8104's place is the Toyota-family door's connector, and the search for it is the install that has that door in front of it. Knowing the place is what keeps the part from being ordered by the year alone – the year narrows, the connector decides.
The Install the Part Serves
- The door panel off, the factory speaker out
- The door's plug unseated, the harness's socket ready
- The plug into the harness – the transfer, no cut
- The new speaker's leads stripped, crimped to the harness's ends
- The plus to the plus, the map held at the crimp
- The speaker into the baffle, the panel back, the door closed
The step list is the install the 72-8104 exists to run, and it is the short version of the door swap. The panel comes off and the factory speaker out, the door's plug unseats from the old speaker's socket, and the plug transfers into the harness – the move that replaces the cut. The new speaker's leads are stripped to the crimp, seated to the harness's ends with the polarity held, and the speaker mounts in the baffle. The panel back, the door closed, and the system checks the driver at the next track. The install is six steps, and the harness is the piece that makes step three a transfer instead of a splice – the property the upgrade keeps when the car is sold and the factory speakers go back in.
The 72-8104 and its siblings are stocked as the door speaker harnesses for the select model ranges, the two-pin and four-pin forms at the in-vehicle gauge; the catalog lists the fit range, the pin form and the length per part number.
Real-World Applications
The sedan's front door pair: the factory speakers out after the years, the 72-8104 harnesses in, the new drivers crimped and the plugs transferred, both doors upgraded with the loom intact. The compact that outlived its speakers: the 2000s model in the fit window, the door's plug the two-pin the harness carries, the swap an hour's job. The fleet car's standard upgrade: the part in the bin by number, the install procedure the step list, the door's wiring the factory's through every rotation. In each the 72-8104 is the connector's harness – the plug form the door presents, carried to the leads the new speaker presents – and the fit list is the survey that put the part in front of the install.
Related reading: The install steps in detail, the swap end to end: Metra 72-8104 speaker wiring harnesses — metra-72-8104-harnesses
Related reading: The fit check, the near-miss parts ruled out: Metra 72-8104 wiring — metra-72-8104-wiring
Frequently Asked Questions
What vehicles does the Metra 72-8104 fit?
The select 1988-2025 models the manufacturer lists: the Toyota line as the core, with the Scion, Lexus, the 1998-2002 Honda Passport, and the select Hyundai, Isuzu, Mitsubishi, Pontiac and Subaru models that share the door connector. The list is the survey – the door's own plug, removed and checked, is the confirmation for the specific car.
Is the 72-8104 a two-pin or a four-pin harness?
The common form is the two-pin door harness – the positive and the negative pair the factory wired in the two-position socket. Where the door's loom presents the four positions, the family's four-pin sibling is the part. Count the pins at the door's plug before ordering; the count, not the year, selects the form.
Do I need the 72-8104 if I am only replacing the speakers?
Yes, if the replacement speakers arrive with bare leads and the door's wiring terminates in the factory plug – which is the standard case. The harness carries that plug to the new speaker's leads, and the swap is the transfer instead of the cut. If the new speakers came with the factory plug pre-fitted, the harness is not the piece – the speaker's own connector is.
Will the 72-8104 work in my specific year and model?
If the year and model are in the manufacturer's fit list and the door's connector matches – the pin count and the positions – then yes. The list is necessary and the connector check is sufficient: a car in the list with the changed socket is the exception the physical check catches, and the check is the plug out of the door and the pins counted.
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