12Pin Female Brown Car Aftermarket Stereo Audio Connector 33472-1203 – TS30359-12P-21-2 Sealed Receptacle for Automotive & Marine Wiring Systems

In the world of automotive electronics, where performance meets precision, the TS30359-12P-21-2 stands as a reliable solution for modern vehicle audio and control wiring. Designed as a high-fidelity replacement for the 33472-1203 OEM connector, this 12-pin female housing features a distinctive brown housing for easy identification and system compatibility. Engineered for durability and consistent signal delivery, it serves as a critical component in aftermarket stereo upgrades, factory harness repairs, and custom wire harness builds for cars, yachts, UTVs, and off-road vehicles. Built with advanced sealing, reinforced materials, and global compliance, this connector ensures long-term reliability in even the most demanding environments.

Brown-Housed 12-Pin Female Connector for 33472-1203 Replacement

The TS30359-12P-21-2 is a precision-engineered female receptacle designed to directly replace the 33472-1203 connector in automotive and marine applications. The brown housing provides a clear visual identifier, making it easy to distinguish from green, black, or grey variants during installation or repair. This color-coding helps prevent wiring errors and speeds up service time, especially in multi-connector systems. With its 12-pin configuration, it supports a full range of audio, power, and control signals, making it ideal for head unit replacements, amplifier connections, and factory harness modifications.

Mat-Seal Technology for Moisture and Dust Resistance

Each terminal cavity is equipped with a pre-molded mat seal and cavity diaphragm that compresses around the wire insulation upon insertion. This creates a waterproof seal that blocks moisture, dust, salt spray, and other environmental contaminants from entering the connector body. This sealing mechanism is essential for vehicles exposed to rain, humidity, or coastal conditions, ensuring long-term reliability and preventing corrosion-related failures in audio and control circuits.

Two-Piece Housing with Wedge Lock for Secure Terminal Retention

To combat the effects of vibration and mechanical stress, this connector features a two-piece housing design with a secondary wedge lock system. After Terminals are inserted into the primary housing, the wedge is slid into place to lock all contacts securely. This dual retention system prevents terminal backout caused by engine vibration, road shock, or thermal cycling—common challenges in automotive and off-road applications. The result is a stable, durable connection that maintains electrical continuity over time, even in harsh operating conditions.

Durable Thermoplastic Housing for Extreme Conditions

The connector body is constructed from either PBT+GF15% or PA66+GF30%, both of which are high-performance, glass-reinforced engineering plastics. These materials offer excellent resistance to heat, impact, and chemical exposure, ensuring the housing remains intact and dimensionally stable across a wide temperature range. Whether installed in a hot engine bay or a cold marine environment, the TS30359-12P-21-2 maintains its structural integrity and electrical performance over time.

Flexible Terminal Options for Optimal Performance

This connector supports a range of terminal materials—copper alloy, brass, and phosphor bronze—allowing users to select the best option based on conductivity, cost, and mechanical strength. Its design is compatible with standard crimping tools and widely used in aftermarket installations and OEM repairs. Whether you're replacing a damaged connector or building a custom harness from scratch, the TS30359-12P-21-2 offers a reliable and versatile solution for professional installers and DIY enthusiasts alike.

Complete Sealed Connector System for Diverse Applications

The TS30359-12P-21-2 mates with the TS30359-12P-11-2 male plug to form a fully sealed, secure connection ideal for audio, control, and sensor circuits. It belongs to a broader family of connectors available in multiple pin counts and housing colors, enabling flexible system design and color-coded identification. We also offer matching male housings and individual terminals, providing a complete solution for wiring harness manufacturers, repair technicians, and system integrators.

Ideal for Automotive, Marine, and Off-Road Use

Common applications include:

• Aftermarket car stereo and infotainment upgrades

• Factory audio harness repair and replacement

• Marine radio, navigation, and entertainment systems

• Control modules in UTVs, ATVs, and agricultural equipment

• Custom wire harness manufacturing for OEMs and aftermarket brands

Its rugged, sealed design ensures dependable performance in both protected cabin environments and exposed outdoor installations.

OEM & ODM Services with Custom Mold Development

We provide full customization capabilities for brands and manufacturers, including private labeling, unique pin layouts, and dedicated mold creation. Our engineering team offers end-to-end support—from design and prototyping to mass production—ensuring every custom connector meets exact technical, aesthetic, and compliance requirements. With fast tooling development and scalable manufacturing, we help businesses deliver high-quality, branded connectivity solutions efficiently.

Quality-Controlled to Meet International Standards

Every unit undergoes 100% inspection before shipment, including continuity testing, visual checks, and verification of lock engagement. Certified to IATF 16949 (automotive quality), ISO14001 (environmental management), and RoHS (hazardous substance compliance), our products meet the highest global standards for safety, reliability, and sustainability—giving customers confidence in every product.

Fast Turnaround and Global Support

With a minimum order of 1,000 pieces and delivery times of 2–15 days, we support rapid fulfillment for distributors, installers, and manufacturers worldwide. For product samples, technical drawings, or inquiries about Molex replacement parts, contact our sales team at mandy@tscn.com.cn for prompt and professional service.

About TSCN – Delivering Reliable Connectivity for Demanding Industries

Zhejiang Tongsheng Electronic Co., Ltd. (TSCN) is a trusted manufacturer of high-performance automotive and industrial connectors. With over 25 years of experience, we specialize in durable, precision-engineered solutions that power reliable systems across global markets.

Please compare and check your connector matches our connector on the photos. If unsure, click on the item inquiry and attach photos of your connector or the part that it plugs into and we'll confirm it for you ASAP.

Can't find the connector you need? Email us to mandy@tscn.com.cn and we'll try to locate one.

ZHEJIANG TONGSHENG ELECTRONIC CO.,TLD are founded in 1998, we are a ISO 9001 and ISO/TS16949 certificated professional manufacturer engaged in automotive aftermarket audio connector and wire harness, terminals and mold development.

Our automotive products are widely used in car audio entertainment connection, one-button start, new energy wiring harness, intelligent remote start wiring harness etc.

We are OEM/ODM available, we performs "excellent quality, super connector" as our honest management principles actively, and provide customers with professional solution service. Our main customer are in North America, Southeast Asia, Europe etc.

This TS30359 series is alternative to Molex MX150 Mat-Sealed Female Connector series, we have four color versions, black, grey, green and brown. Black equal to key A code, grey equal to key B code, green equal to key C code, brown equal to key D code. This family of products is available in 4, 6, 8, 12, 16 and 20 pins. Terminals and mating male housings are also available upon request.

The TS30359 Sealed Connector System is compatible with a wide range of automotive and commercial vehicle applications. It provides efficient power and signal transmission, allowing for seamless communication between various components and systems. The connector system's current rating of up to 22.0A ensures efficient power delivery, supporting the demanding requirements of modern vehicles.

Its robust construction and sealing properties provide protection against dust, water, and other contaminants, ensuring reliable operation in challenging environments.

Our TS30359 series is a trusted solution for power and signal connectivity in automotive and commercial vehicle applications. Its high current rating, durability, and compatibility make it an ideal choice for demanding industry requirements.