AUDI A8 4N Engine Air filter 4N0129620C 4N0129620 4N0129620B

Our Service:

1. We welcome OEM manufacturing partnerships, offering flexible customization across product specifications (e.g., filtration precision, size adaptation for specific models), packaging solutions (including brand-customized designs and export-grade protective packaging), and additional value-added services to align with your market needs and operational goals.
2. We provide samples of standard parts for pre-production validation, allowing you to verify critical attributes such as dimensional compatibility with your equipment, filtration performance, and material durability upfront—effectively reducing risks in mass production.
3. We guarantee a response to all your inquiries (including quotations, technical details, lead times, and customization requirements) within 24 working hours, ensuring timely communication to avoid delays in your procurement or project timelines.
4. After shipment, we will proactively share logistics updates (e.g., tracking numbers, transit locations, estimated delivery dates) every two days until you receive the goods. Upon receipt, please inspect the packaging for integrity, test the product’s functionality, and share your feedback—this helps us enhance our collaboration. If any issues arise (such as transit damage, performance discrepancies, or packaging defects), contact us immediately, and we will promptly provide targeted solutions (e.g., replacements, repairs, or technical support) to resolve them.

   

   

Quality Control

For Guangzhou Yuanzhuang Filter Co., Ltd., quality assurance serves as the cornerstone of our operations in the R&D, design, and production of filters for automotive, construction, and agricultural machinery. We clearly recognize that a filter’s filtration effectiveness and long-term durability are critical to sustaining the optimal performance and service life of the equipment it is integrated into. As such, we have developed and fully implemented a comprehensive, stringent quality control system—one that fully complies with the rigorous requirements of the IATF 16949 quality management system, an authoritative framework tailored specifically for the global automotive and heavy machinery supply chains.

Our Promise:

We have consistently earned the trust of our customers by upholding rigorous quality standards, and an increasing number of overseas customers have also come to place their trust in us—your trust has always been, and will continue to be, a key driving force behind our ongoing progress; we sincerely welcome all our customers to share your valuable opinions and suggestions with us, and let us join hands to work together for mutual success!

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Guangzhou Yuanzhuang Filter Co., Ltd
Innovation driven professional development in the field of environmental filtration
Guangzhou Yuanzhuang Filter Co., Ltd., located at the intersection of the Liuxi River Ecological Corridor and National Highway 105 in Guangzhou, is a technology-based private enterprise deeply involved in the entire industry chain of environmental protection filter cartridges. Since its establishment, the company has always adhered to the business philosophy of "building the foundation with technology and shaping the future with quality", focusing on the research and development of core components in areas such as air purification and industrial filtration. It has now become an important participant and innovation leader in the technical standards of China's environmental filter industry.

Anchor environmental protection needs and lay out a green industrial chain
Faced with the increasingly strict global environmental regulations and the demand for industrial upgrading, Yuanzhuang Filter has precisely entered the high value-added track, building a full category filter matrix covering three major fields: automobile exhaust purification, industrial dust treatment, and building ventilation systems. Its product line includes cutting-edge categories such as nanofiber composite filters, high-temperature resistant ceramic filters, and intelligent self-cleaning filters. Through the dual certification system of ISO 9001 and IATF 16949, it provides customized filtration solutions for world-class brands and automotive host customers. Relying on a 100000 square meter intelligent production base along the Liuxi River and a convenient logistics network on National Highway 105, the company has achieved an annual production capacity of over 10 million filter cartridges, radiating to Southeast Asia, Europe, and America markets.

Building a technological foundation and forging professional competitiveness
The company is guided by the strategy of "technology penetrating the market", investing 6% of its annual revenue in research and development innovation, forming a professional team, and through deep cooperation between industry, academia, and research, overcoming 12 industry pain points such as low wind resistance and high dust holding technology, electrostatic electrostatic polarization and long-lasting antibacterial technology. It has obtained more than 20 invention technology patents, and its unique "gradient density laminating technology" has increased the service life of filter cartridges by 30%, reduced energy consumption by 15%, and technical parameters meet the EU EN 779:2012 standard.

Innovation driven, defining a new paradigm for the industry

The company has launched a revolutionary "Oxygen Health" series of filters, which deeply integrates the function of generating negative oxygen ions into the air purification system through innovative oxygen generating material technology. This product uses natural mineral composite nanomaterials to continuously release negative oxygen ion concentrations of 1200-2000/cm ³ during the air filtration process (meeting forest level air quality standards), breaking through the limitations of traditional filters that only intercept pollutants and achieving a dual upgrade of active purification and health benefits.
Core technology: The filter material not only intercepts PM2.5 and decomposes formaldehyde, but also stimulates the ionization of air water molecules to produce ecological level negative oxygen ion groups. It has been tested and certified by the Guangzhou Microbial Testing Center and applied to high-end residential buildings, medical cleanrooms, and new energy vehicle cabins, helping consumers enjoy a "forest oxygen bar" level breathing experience in urban environments and redefining new standards for healthy air purification.