Genuine 0008305784 HVAC Heater Control Valve

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Genuine 0008305784 HVAC Heater Control Valve

Brand	Genuine 0008305784
Fits	Porsche, Mercedes-Benz, Audi, and Volkswagen · 72 vehicles

Heater control valve. Regulates coolant flow for precise cabin temperature control.

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HVAC Heater Control Valve for Porsche, Audi, Mercedes-Benz

This Genuine HVAC heater control valve, part number 0008305784, regulates coolant flow through the heater circuit to help maintain proper cabin temperature control. It is a direct-fit style replacement for select Porsche, Audi, Mercedes-Benz, and Volkswagen applications with confirmed fitment.

Key Features

Genuine HVAC heater control valve for temperature control system service
Part number 0008305784 for accurate ordering and identification
Fits select Porsche 928, Porsche 944, Porsche 968, Audi 80, Audi 90, Audi 100, Audi 200, Audi 5000 Quattro, Mercedes-Benz 190E, and Volkswagen Fox applications
Application-specific fitment for vehicles with standard A/C or vacuum-actuated heater control setups where noted
Compatible With 1978-1995 Porsche 928 and related European HVAC systems

Detailed Description

Use this heater control valve to restore coolant routing through the heater hoses and maintain consistent heat output in the cabin. The Genuine 0008305784 is listed for a wide range of European vehicles, including Porsche 928, Porsche 944, Porsche 968, Audi 80 and 90 models, Mercedes-Benz 190E, and Volkswagen Fox. Fitment notes include standard A/C on several Audi applications, vacuum actuation on the Mercedes-Benz 190E, and specific production cutoffs on select Porsche and Volkswagen models. This part number 0008305784 is a practical match for owners servicing aging HVAC systems on classic Porsche and Audi platforms.

What It Helps Fix

Weak or inconsistent cabin heat
Coolant flow problems through the heater core circuit
Temperature control issues caused by a sticking valve
HVAC performance loss on vacuum-actuated or standard A/C systems
Leaks or deterioration at the heater hose valve assembly

Installation Notes and Tips

Install in the heater hose circuit and verify the vehicle’s exact year, engine, and HVAC configuration before ordering. Several listings include production-date and VIN breakpoints, so confirm those details against the vehicle before replacement. On Mercedes-Benz 190E applications, the valve is located between the heater hoses and uses vacuum actuation. On Audi applications, confirm standard A/C equipment where specified.

Quality Assurance

Genuine replacement part engineered for the listed applications. This part cross-references 1A Auto (e.g., 0008305784) for the same application.

This part fits 72 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Position	Notes
1995	Porsche	928	—	N/A	—
1995	Porsche	968	—	N/A	—
1994	Porsche	928	—	N/A	—
1994	Porsche	968	—	N/A	—
1993	Mercedes-Benz	190E	2.3	N/A	Between heater hoses; Vacuum actuated
1993	Porsche	928	—	N/A	—
1993	Porsche	968	—	N/A	—
1992	Audi	80	—	N/A	w/ Std. A/C
1992	Audi	80 Quattro	—	N/A	w/ Std. A/C
1992	Mercedes-Benz	190E	2.3	N/A	Between heater hoses; Vacuum actuated
1992	Porsche	968	—	N/A	—
1991	Audi	80	—	N/A	w/ Std. A/C
1991	Audi	80 Quattro	—	N/A	w/ Std. A/C
1991	Audi	90	—	N/A	w/ Std. A/C
1991	Audi	90 Quattro	—	N/A	w/ Std. A/C
1991	Mercedes-Benz	190E	2.3	N/A	Between heater hoses; Vacuum actuated
1991	Porsche	928	—	N/A	—
1991	Porsche	944	—	N/A	—
1991	Volkswagen	Fox	—	N/A	To 2/91
1990	Audi	100	—	N/A	Thru 10/89; VIN 44.L.031 530
1990	Audi	100 Quattro	—	N/A	Thru 10/89; VIN 44.L.031 530
1990	Audi	200	—	N/A	Thru 10/89; VIN 44.L.031 530
1990	Audi	200 Quattro	—	N/A	Thru 10/89; VIN 44.L.031 530
1990	Audi	80	—	N/A	w/ Std. A/C
1990	Audi	80 Quattro	—	N/A	w/ Std. A/C
1990	Audi	90	—	N/A	w/ Std. A/C
1990	Audi	90 Quattro	—	N/A	w/ Std. A/C
1990	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1990	Porsche	928	—	N/A	—
1990	Porsche	944	—	N/A	—
1990	Volkswagen	Fox	—	N/A	—
1989	Audi	100	—	N/A	—
1989	Audi	100 Quattro	—	N/A	—
1989	Audi	200	—	N/A	—
1989	Audi	200 Quattro	—	N/A	—
1989	Audi	80	—	N/A	w/ Std. A/C
1989	Audi	80 Quattro	—	N/A	w/ Std. A/C
1989	Audi	90	—	N/A	w/ Std. A/C
1989	Audi	90 Quattro	—	N/A	w/ Std. A/C
1989	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1989	Porsche	928	—	N/A	—
1989	Porsche	944	—	N/A	—
1989	Volkswagen	Fox	—	N/A	—
1988	Audi	5000 Quattro	—	N/A	—
1988	Audi	80	—	N/A	w/ Std. A/C
1988	Audi	80 Quattro	—	N/A	w/ Std. A/C
1988	Audi	90	—	N/A	w/ Std. A/C
1988	Audi	90 Quattro	—	N/A	w/ Std. A/C
1988	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1988	Porsche	928	—	N/A	—
1988	Porsche	944	—	N/A	—
1988	Volkswagen	Fox	—	N/A	—
1987	Audi	5000 Quattro	—	N/A	—
1987	Mercedes-Benz	190E	2.3	N/A	Between heater hoses; Vacuum actuated
1987	Porsche	928	—	N/A	—
1987	Porsche	944	—	N/A	—
1987	Volkswagen	Fox	—	N/A	—
1986	Audi	5000 Quattro	—	N/A	—
1986	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1986	Porsche	928	—	N/A	—
1986	Porsche	944	—	N/A	—
1985	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1985	Porsche	928	—	N/A	—
1985	Porsche	944	—	N/A	From 85/2; Late Series
1984	Mercedes-Benz	190E	—	N/A	Between heater hoses; Vacuum actuated
1984	Porsche	928	—	N/A	—
1983	Porsche	928	—	N/A	—
1982	Porsche	928	—	N/A	—
1981	Porsche	928	—	N/A	—
1980	Porsche	928	—	N/A	—
1979	Porsche	928	—	N/A	—
1978	Porsche	928	—	N/A	—
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