4F0820521A Blower Motor Regulator for Audi A6 (C6) and Audi R8 Series

Cross Reference Numbers for Blower Motor Regulator 4F0820521A

Category	Brand / Manufacturer	Reference Number
OE Number	VAG Group (Audi)	4F0820521A (4F0 820 521 A)
OE No.	VAG Group (Audi)	4F0820521 / 470910521
Major Aftermarket Brands	VEMO (Germany)	V10-79-0019
	NRF	342080
	METZGER	0917070
	Febi Bilstein	36040
Interchange Part Nos.	Topran / Hans Pries	111 416
	LPR / GAUSS	JA1735 / GA15467

Specification for Blower Motor Regulator 4F0820521A

Technical Parameter	Professional Specification
Control Logic	Advanced PWM
Heatsink Type	High-Density Extruded Aluminum Fins
Operating Voltage	12V DC
Terminal Configuration	6-Pin Multi-Connector
Housing Material	PA66 + 35% GF
Signal Compatibility	Direct LIN-Bus / PWM Interface Support
Safety Logic	Short-Circuit & Thermal Overload Protection
Quality Standard	IATF 16949 / CE Certified

Vehicle Application for Blower Motor Regulator 4F0820521A

Brand	Model	Year Range	Engine & Fitment Notes
Audi	A6 / S6 Saloon (4F2, C6)	2004 – 2011	2.0TFSI, 2.4, 2.8FSI, 3.0TDI, 4.2
Audi	A6 Avant (4F5, C6)	2005 – 2011	All Wagon / Estate Variants
Audi	A6 Allroad (4FH, C6)	2006 – 2011	Off-road Suspension Variants
Audi	R8 (422, 423)	2007 – 2015	4.2 FSI / 5.2 FSI V10
Audi	R8 Spyder (427, 429)	2010 – 2015	Convertible Supercar Variants

Why Choose Elecdura as Your Blower Motor Resistor Supplier

Elecdura Blower Motor Resistor Wholesale & Logistics Services

• Custom Branding Solutions: All units are supplied in neutral packaging by default, with full support for customized labels, private-label packaging, and logo printing to enhance your brand presence.

• Flexible Bulk Ordering: Our standard Wholesale MOQ starts at 100 units per item, and we encourage you to discuss any specific volume requirements or custom terms with our dedicated sales team.

• Ready-to-Distribute Supply: We provide high-quality finished products ideal for rapid distribution, with a reliable 60-day production lead time for all wholesale orders to ensure your inventory stays consistent.

Elecdura Blower Motor Resistor Partner Factory Tour

Why Choose Elecdura for Blower Motor Resistor?

1. Backed by Tier-1 Manufacturing Excellence

Our resistors are manufactured in China’s top-tier automotive facilities, which serve as trusted OEM suppliers for global automotive giants such as BYD, Geely, and Chery, as well as renowned international aftermarket brands like Valeo, NRF, and Dorman. By choosing Elecdura, you gain access to the same rigorous production standards and technical expertise required by the world's leading car manufacturers.

2. Optimized Price-Performance through Strategic Sourcing

As a specialized automotive aggregator, Elecdura does more than just sell parts—we manage a premium factory network. We conduct deep comparisons across multiple top-scale manufacturers to select the optimal balance of quality and cost. This allows us to provide you with a product that matches OE reliability while maintaining a competitive price edge that factory-direct models often cannot offer due to their rigid pricing structures.

3. Proven Market Success and Supply Stability

The Blower Motor Resistor is a cornerstone of our thermal management line with a proven track record. We currently supply high-volume orders to major international wholesalers, meaning our products are already "battle-tested" in the global aftermarket. This ongoing, stable production ensures that we have both the refined quality control and the massive capacity to fulfill your bulk requirements without lead-time fluctuations.

4. Professional Quality Assurance & Testing

Leveraging our partners' advanced laboratory capabilities, every batch of our resistors undergoes 100% End-of-Line testing. From salt spray resistance to thermal cycling, we ensure that the components you receive are built to survive extreme conditions, significantly reducing your RMA (Return Merchandise Authorization) rates and protecting your brand reputation.

Blower Motor Resistor Successful Aftermarket Case

4F0820521A Blower Motor Resistor Wholesaler Frequently Asked Questions

1. Does this regulator support the "Automatic Defrost" and "Rest" functions in the Audi A6?

Yes. Our 4F0820521A is fully compatible with Audi's MMI-integrated climate control logic. It accurately interprets signals for high-speed defrosting as well as the low-speed residual heat (REST) functions common in European models.

2. Why is the heatsink design so critical for the Audi R8 application?

The Audi R8's engine and cabin environment generate significant heat. We use a high-thermal-flux aluminum alloy for the heatsink to ensure the electronic components remain stable even during high-performance driving or in extreme Summer conditions.

3. Is this 6-pin regulator interchangeable with 4-pin versions?

No. The 4F0820521A uses a specific 6-pin interface that handles both power and the complex data signals required by the C6 platform. Always verify the pin configuration and OE suffix "A" before bulk purchase.

4. How does Elecdura address the "Blower Motor Noise" related to regulator failure?

In many cases, an aging regulator sends an unstable signal, causing the blower motor to hum. We use high-grade smoothing capacitors in our circuitry to provide a clean DC output, ensuring silent and smooth motor operation.

5. What is the typical wholesale MOQ for this Audi premium SKU?

Our MOQ for the 4F0820521A is 100 units. This is a high-demand SKU for VAG-specialist wholesalers due to the large global population of Audi C6 vehicles.

6. Do you provide localized tech-data sheets for European distributors?

Absolutely. We provide comprehensive technical dossiers, including electrical load parameters and IATF 16949 certificates, to help our partners meet the strict compliance requirements of the EU aftermarket.