4-Pin 1.0mm Rearview Mirror Heating Connector OEM MX19004S51 / MX19004P51 / MX19004S52 / MX19004P52
Direct OEM-specification replacement for the 4-pin 1.0mm fine-pitch waterproof connector used on powered rearview mirror assemblies — covering heated mirror element, electric folding motor, and mirror position adjustment harnesses. Cross-references OEM numbers MX19004S51 (female/socket), MX19004P51 (male/pin), MX19004S52, and MX19004P52. The MX19 series is a compact 1.0mm pitch connector designed for door and mirror harness applications where space is limited and vibration resistance is required.
| OEM Number | Type | Variant |
|---|---|---|
| MX19004S51 | Female housing (socket contacts) | Standard – 51 color/lock variant |
| MX19004P51 | Male housing (pin contacts) | Standard – 51 color/lock variant |
| MX19004S52 | Female housing (socket contacts) | Alternate – 52 color/lock variant |
| MX19004P52 | Male housing (pin contacts) | Alternate – 52 color/lock variant |
| Pin | Function | Failure Symptom if Open/Corroded |
|---|---|---|
| 1 | Heated mirror element power (+12V switched) | Mirror not defrosting; ice / condensation on mirror |
| 2 | Heated mirror ground | Heater element inoperative even with power present |
| 3 | Electric fold motor power / signal | Mirror not folding or unfolding on command |
| 4 | Mirror fold ground / position feedback | Mirror stuck in one position; B-code fold fault |
| Attribute | Detail |
|---|---|
| Pin Count | 4-Pin |
| Terminal Pitch | 1.0mm (MX19 series) |
| OEM Numbers | MX19004S51 / MX19004P51 / MX19004S52 / MX19004P52 |
| Housing Material | PA66 nylon, waterproof sealed |
| Sealing | Individual wire seals |
| Application | Rearview mirror heating element, electric fold motor, position adjustment |
Q: My heated mirror stopped working but the folding function is fine — is it the connector?
A: Yes. If only the heating function fails while folding works, the fault is isolated to Pin 1 or Pin 2 (heater circuit). Inspect the MX19004 connector for corrosion on these two pins specifically. The 1.0mm fine-pitch terminals are susceptible to corrosion from door seal moisture ingress.
Q: What is the difference between MX19004S51 and MX19004S52?
A: The “51” and “52” suffixes denote different color or secondary lock variants within the MX19004 series. The housing geometry and terminal pitch are identical — both are interchangeable for connector repair purposes. Select based on the color of your original connector.
Q: Are terminals included?
A: Yes, 1.0mm fine-pitch terminals and wire seals are included with all variants.
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