The power steering pressure hose is the high-pressure artery of your vehicle's steering system. It is responsible for transporting hydraulic fluid from the power steering pump to the steering rack (or gearbox) at incredibly high pressures—often exceeding 1,000 psi during sharp turns. This fluid creates the "power assist" that allows you to turn a two-ton vehicle with just one hand. Because these hoses are made of reinforced rubber and metal, they must be flexible enough to handle engine vibrations yet tough enough to survive the intense heat of a South African summer. If your car was built in the last decade, you might have Electric Power Steering (EPS), but for the millions of hydraulic-assisted bakkies and sedans on our roads, this hose is a critical failure point.
The power steering pressure hose transfers the high-pressure hydraulic output of the power steering pump to either a steering gear box or steering rack and pinion unit to create the power assist that you rely on when you turn the steering wheel. The pressure hose is only used in cars with a power steering pump and reservoir, so if you have a newer car you may have electric power steering instead. The pressure hose is relatively large in diameter to withstand high hydraulic pressure, flex as the engine moves and vibrates, and withstand engine heat, accidental cuts, and abrasion. The underhood routing of the power steering pressure hose varies greatly between car models. The repair procedure ranges from simple to quite involved. The basic steps are: No. The fluid in the power steering pressure hose is under very high pressure and flammable. A leak that sprays fluid into a hot engine part, such as the exhaust manifold, can cause a fire. Leaks that cause significant fluid loss can cause difficulty in steering. If a leak causes the fluid level in the reservoir to drop too low, it can cause damage to the power steering pump, necessitating the installation of a new one hose and a new pump.