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1-Pack 645 4H0951253A 4RA007791-20 12V DC 40A SPST Relay – Compatible with Audi A3/A4/A6 & VW Passat – Fixes A/C Clutch (P0641) & Cooling Fan Errors (P0480/P0481)

KWD 3
KWD 3.500

Brand
Sonzrod
Number of Items1
1 +

Special Features

  • 40A SPST High-Load Design - 12VDC Single Pole Single Throw relay controls A/C compressors and radiator fans. Direct replacement for OEM 4H0 951 253A and 4RA 007 791-20 relays
  • European Vehicle Coverage - Compatible with Audi A3/A4/A6 (2015–2021) climate systems and Volkswagen Passat (2017–2023) cooling modules
  • Diagnostic Code Resolution:Fixes P0480 (Cooling Fan 1 Control Circuit) and P0481 (Cooling Fan 2 Control Circuit) errors caused by relay contact corrosion or coil degradation
  • Industrial-Grade Durability - Silver-tin oxide contacts resist arcing in 40A loads. IP52 housing protects against dust and humidity (-40°F to 185°F)
  • Plug-and-Play 4-Pin Design - Matches factory fuse box sockets (terminals 30-85-86-87). Epoxy-sealed construction prevents coil

Description

Reliable Climate Control for European Vehicles
This SPST relay restores critical functionality to A/C compressors and radiator fans in compatible Audi and Volkswagen models. Designed to replace worn or corroded relays, it ensures stable operation under high electrical loads.

Technical Specifications:

Contact Type: SPST (Normally Open)

Terminal Layout: 4-pin (ISO 7588-1 compliant)

Electrical Rating: 40A 12VDC resistive / 25A 14VDC inductive

Environmental: IP52-rated housing, epoxy-sealed coil

Primary Applications:

A/C Compressor Control: Resolves intermittent cooling or clutch disengagement during idle.

Radiator Fan Systems: Restores high-speed activation to prevent engine overheating.

Auxiliary Circuits: Supports aftermarket lighting or audio upgrades.

Cross-Reference Compatibility:

Direct swap for HELLA 4RA 007 791, TYCO V23134, and Bosch 0332019150.

Installation Guide:

Locate the original relay in the under-hood fuse box (labeled "A/C" or "FAN").

Align the housing arrow with the socket orientation for correct terminal alignment.

Test A/C cooling and fan speeds post-installation.

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