Yazaki 58 Series 9.5mm 2-Way Female Housing 7123-4129-90

Terminals are not included

2 Way Automotive Connector

Classified Parts Housing

Family 58 Connectors

Type L Type

Yazaki Part Number 7123-4129-90

Connection Type Wire to Wire

Wire to Board

Wire to Device

Unsealed/Sealed Unsealed

Male/Female Female

Number of Poles 2

Tab Width mm(inches) 9.5(375)

Material Nylon66

Plating -

Colour Blue

Rating -

Mating Part Numbers 7122-4129-90

Yazaki 7123-4129-90 58 Series L-Type 2-Way High-Current Female Connector Housing (Blue)

Manage heavy electrical loads, restore maximum power delivery, and bypass burnt factory block junctions with this genuine Yazaki 7123-4129-90 2-way unsealed female automotive connector housing. Precision-molded in Japan by Yazaki to demanding original equipment standards, this high-performance 2-pin socket block belongs to the robust 58 Connector L-Type family and features a distinct Blue identification housing. Engineered explicitly to isolate high-amperage lines, it accommodates substantial 9.5mm width female terminal contacts to deliver ultra-stable conductivity under substantial electrical strain.

The 7123-4129-90 housing is a critical, heavy-duty repair component widely relied upon across passenger vehicles, commercial trucks, and agricultural fleet platforms. Boasting an outstanding allowable continuous current rating of up to 60 Amps, it is the standard factory interface for dominant, high-exposure powertrain components—most notably acting as the primary connection for high-capacity interior blower motor fans, radiator cooling fan arrays, and high-load vehicle air conditioning climate assemblies. Because these specific sub-circuits draw massive continuous currents, any minor terminal backing or loose contact tension creates severe electrical resistance. Over time, this thermal buildup degrades, warps, or outright melts the original factory plastic housing, causing total subsystem failure or hazardous short circuits. This authentic replacement shell allows master auto-electricians to confidently depin a heat-damaged factory block and seat the lines into a pristine, high-temp Nylon 66 casing, eliminating the vast cost and labor of an entirely new vehicle wire loom overlay. It docks effortlessly into its matching male inline partner housing, part number **7122-4129-90**.

### Key Features & Technical Specifications:

* **Genuine Yazaki Manufacturing Integrity:** Guarantees absolute dimensional accuracy, zero-tolerance terminal slot alignments, and factory-specified mating retention. Eliminates the high risks of terminal push-out or terminal fretting common with generic unbranded alternatives.

* **60A Allowable Current Capacity:** Heavy-duty architecture utilizing a 9.50mm tab size grid, purpose-built to handle continuous large-current loads without thermal saturation or voltage drops.

* **Premium Nylon 66 Construction:** Molded using heavy-duty, flame-retardant, and thermal-stabilized engineering polyamide built to safely withstand extreme operating temperature ranges from -40°C up to +120°C.

* **Distinct Visual & Mechanical Polarization:** Finished in an easily scannable blue polymer shell with precise internal alignment tracks, preventing cross-mating errors during installation on crowded multi-relay dashboards or engine bay panels.

* **Scalable B2B Volume Trade Accounts:** Running an independent auto-electrical garage, diagnostic service center, or a high-volume commercial fleet workshop? Access automated tiered trade savings applied instantly to your basket at checkout.

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