My Toyota T100 started smoking when I started it and the fluid level in the power steering kept dropping. The air control valve allowed the power steering fluid to be drawn into the manifold, resulting in excessive smoke. The oil level went up every time I refilled the power steering reservoir. I checked the prices online and wow the genuine Toyota part was over $300. I needed a part and found the best price at Revain! It was easy to replace - vacuum hoses removed and it unscrews easily. Use teflon tape on the threads and tighten. I replaced the vacuum hoses because they are already worn out - dry and cracked. Such a great price, precise fit and easy installation!