[HEAVY-DUTY SPECS] This 12V 40A 4-pin SPST power relay is a functional replacement for OE part numbers 4H0951253A and V23136-B0006-X080. It features high-conductivity alloy pins to maintain electrical circuit integrity in high-load powertrain management systems. [BROAD COMPATIBILITY] Expertly engineered to be compatible with Volkswagen Jetta, compatible with Volkswagen Tiguan, and fits Audi A4, fits Audi Q5, fits Porsche Panamera, and fits Porsche Cayenne models (2011-2024). It integrates seamlessly into factory engine bay or under-dash relay panels. [FIXES COMMON ISSUES] Restores reliable power supply to solve intermittent engine stalling, non-responsive fuel pumps, and "crank but no start" conditions. Effectively clears diagnostic trouble codes such as P0230 and P0691 related to terminal 15/30 circuit malfunctions. [PREMIUM BUILD] Constructed with an upgraded high-temperature resistant PA66 nylon housing designed to survive engine bay heat up to 257 degrees F. The internal silver-alloy contact points resist welding and carbon buildup, ensuring a crisp mechanical click and long-term stability. [MAINTENANCE RELIABILITY] This single-unit relay serves as a direct plug-and-play solution for critical electrical systems including the ignition, cooling fan, and horn. It provides a reliable alternative for replacing aged factory units that are prone to overheating and intermittent failures.

Are you dealing with an engine that fails to start or stalls intermittently?

If your vehicle’s fuel pump fails to engage or you hear erratic clicking from the dashboard, the culprit is often a worn-out electrical switch. The 645 Power Relay (4H0951253A) is a critical link in your electrical system, managing power to the ignition and powertrain modules. Replacing a failing relay is a fast, effective step to restore your vehicle's reliability and clear persistent warning lights.

Precision Engineering for High-Heat EnvironmentsBuilt to handle the intense heat soak of modern engine bay fuse boxes, this 40-Amp relay features high-conductivity contacts that prevent voltage drops. It is designed as a compatible replacement for original relays in models fits Audi, compatible with Volkswagen, and fits Porsche Panamera. Our high-specification components are engineered to resist internal contact wear, providing a cleaner circuit path than standard generic alternatives.

Applications Include:

• Fuel Delivery: Compatible with Volkswagen Jetta and fits Audi A4 fuel pump circuits.

• Ignition Systems: Power distribution for Terminal 15 and Terminal 30 load reduction.

• Thermal Management: Controls radiator cooling fans and secondary air injection systems.

• Accessory Power: Compatible with Volkswagen Tiguan horn and AC blower circuits.

How to Choose:Before installation, verify the "645" stamp on the top of your original relay and match the 4-pin layout with OE part number 4H0951253A. Ensure the relay seats firmly into the socket for a vibration-resistant connection in your vehicle’s electrical panel.