OE/Part Numbers : FSN5-20-660B FSN520660B E9T06871
Compatible Brands: for Mazda
Compatible Vehicles & Years:
- for Mazda 626 (1999-2001), 626 DX (1998), 626 ES (2002), 626 LX (1998-2002)
- for Mazda Protege (1999-2001), Protege DX (2002-2003), Protege ES (2002-2003)
- for Mazda Protege LX (2002-2003), Protege Mazdaspeed (2003), Protege MP3 (2001)
Key Functions: This idle air control valve regulates the engine's idle speed by controlling the amount of air bypassing the throttle body.
Features & Advantages:1.Direct OEM Fit & Function. 2 .High-Quality Components for Reliability. 3.Rigorous Quality Control.
More Details
Key Features
Applications
FAQ
The FSN5-20-660B Idle Air Control Valve is engineered to help maintain stable engine idle speed by precisely regulating airflow during low-throttle operating conditions. Manufactured to meet OE specifications, this valve is designed as a direct replacement for part numbers FSN5-20-660B, FSN520660B, and E9T06871, commonly used in Mazda 626 and Mazda Protege applications. Compatible with selected 1998–2003 models, it offers reliable electrical response, durable housing construction, and accurate fitment for straightforward installation. Each unit undergoes functional and quality testing to ensure consistent performance, helping reduce idle fluctuations, stalling, and rough engine operation while supporting long-term service life. Compatible with Mazda 626 and Protege models using OE reference FSN5-20-660B.
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Q1: Is this a direct-fit replacement part?
A: Yes. The valve is designed according to OE dimensions and connector specifications, allowing installation without modification on compatible vehicles.
Q2: Does the product include a gasket?
A: Packaging options can be customized according to customer requirements. Standard kits may include a gasket depending on the order specification.
Q3: What symptoms indicate a faulty idle air control valve?
A: Common signs include unstable idle speed, engine stalling at stops, rough idling, fluctuating RPM, and difficulty maintaining a smooth idle.
Q4: How do you ensure product quality during manufacturing?
A: Every valve is produced using precision-machined components and tested for electrical operation, airflow control performance, and dimensional accuracy before shipment to ensure reliable operation.
Q5: Can you provide OEM/ODM manufacturing services?
A: Yes. As a manufacturer, we support OEM and ODM projects, including custom branding, packaging design, part number labeling, and bulk production for distributors and aftermarket suppliers.
Wenzhou Guocheng Automobile Electrical Parts Co., Ltd.
Wenzhou Guocheng Automobile Electrical Parts Co., Ltd. is located in Wenzhou, Zhejiang Province, known as China's capital of auto parts. Established in 1997, the company covers a land area of 3,000 square meters with a built-up area of 10,000 square meters. It is a privately-owned enterprise integrating product development, production, and sales.
Our core products include idle speed motors, idle control valves, throttle position sensors, and other sensor series primarily used in automotive and construction machinery engines. To ensure superior quality, key components such as sensor brushes are imported from Japan and Germany, while films are custom-produced by top-tier domestic and international suppliers. Our products are already supplied to first-tier brands both in China and abroad, and our annual production and sales volume holds a significant position in the OEM market.
To meet production demands and customer requirements, we have continuously invested in advanced production, testing, and experimental equipment from both domestic and international sources. This has significantly enhanced our production inspection and testing capabilities, ensuring consistent and reliable product quality. Currently, we have over 80 employees, including 6 experienced technical engineers and 8 professional technical and inspection personnel, providing strong support for product development and quality control.
Since its inception, the company has adhered to the quality policy of "Continuous Learning, Technological Innovation, Pursuit of Excellence, and Customer Satisfaction." We uphold a "people-oriented" talent philosophy and emphasize a customer-centric approach in quality management, focusing on process control, prevention, continuous improvement, and customer satisfaction. Since 2007, the company has been certified with ISO 9001:2000 and ISO/TS 16949:2009 international quality management system standards.
Over the years, through relentless efforts, innovation, and improvement, Guosheng has earned consistent praise from both new and existing customers for its exceptional product quality, comprehensive service, and competitive pricing. To achieve greater development, our team remains committed to striving harder, learning humbly, and making continuous progress. We constantly summarize experiences and enhance product quality while working with passion and sincerity to collaborate with partners worldwide for mutual success. We sincerely welcome your valuable feedback and visits for guidance.
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