What happens when a power steering hose fails
A power steering hose carries pressurized fluid from your pump to the steering gear, making it possible to turn the wheel without extreme effort. When a hose cracks, splits, or develops a leak, you lose pressure in the system. The steering wheel becomes stiff and hard to turn, especially at low speeds or when parked. You may also notice red or pink fluid pooling under the front of your car, or smell burnt fluid near the engine.
Replacing the hose yourself is possible if you have basic mechanical skills, a jack, jack stands, and common hand tools. The job typically takes two to four hours depending on which hose has failed and how accessible it is on your vehicle. If you are not comfortable working under a car or do not have the right tools, a mechanic can do this work for $200 to $600 in labor, plus the cost of the hose itself.
Key Takeaways
- Power steering hoses carry pressurized fluid and fail when they crack, split, or develop leaks, making the steering wheel hard to turn.
- You will need to drain some fluid from the reservoir, remove the old hose, and install a new one with new crimped fittings at each end.
- The high-pressure hose (from pump to gear) is more common to replace than the return hose, and location varies by vehicle model.
- After installation, you must refill the reservoir, bleed air from the system, and check for leaks before driving.
- If the hose is difficult to access or you lack a hose crimper, a shop can complete the work faster than attempting it yourself.
Locate the failed hose and gather your tools
Start by identifying which hose is leaking. The high-pressure hose runs from the power steering pump (usually on the engine) to the steering gear (underneath, near the front wheels). The return hose runs from the gear back to the reservoir. Trace both hoses with your eyes while the engine is off and cold. Look for wet spots, cracks, or a fine mist of fluid on the hose surface.
Once you know which hose has failed, gather these tools: a socket set and wrenches (sizes vary by vehicle), a drain pan, jack and jack stands, wheel chocks, a hose crimper or access to one, new hose material (if you are making your own), new hose fittings that match your old ones, power steering fluid that matches your vehicle's specification, and a turkey baster or small pump to remove old fluid from the reservoir.
Check your vehicle's service manual or a repair database to confirm the exact location of the hose on your model, the fluid type, and whether the hose comes as a complete assembly or if you need to crimp new fittings onto new hose material. Some vehicles have the hose routed around the engine in a way that requires removing other components first.
Drain the system and remove the old hose
Park on a level surface and engage the parking brake. Place wheel chocks behind the rear wheels. If the failed hose is difficult to reach, raise the front of the vehicle with a jack and support it securely on jack stands under the frame. Never work under a car supported only by a jack.
Remove the power steering fluid reservoir cap. Use a turkey baster or small pump to remove as much fluid as possible from the reservoir and place it in a drain pan. This reduces spillage when you disconnect the hose. Locate the hose fittings at both ends. One end connects to the pump or gear with a banjo bolt (a bolt that passes through a hollow fitting) or a threaded connection. The other end connects the same way.
Place the drain pan under the first fitting. Using the correct wrench size, loosen and remove the bolt or nut at one end of the hose. Fluid will drip out. Remove the bolt or nut at the other end. The hose may be held in place by clips or brackets along its length. Remove those as well. Carefully pull the hose away from the engine and steering components. Inspect the fittings at each end to see if they are crimped onto the hose or if they are reusable.
Install the new hose and fittings
If your new hose comes as a complete assembly with fittings already attached, skip to the next step. If you are installing new hose material with separate fittings, you will need to crimp the fittings onto each end of the hose using a hose crimper. This tool compresses a metal ferrule around the hose to create a seal. Hose crimpers can be rented from tool rental shops for $15 to $30 per day. Follow the crimper's instructions for the correct ferrule size and compression depth for your hose diameter.
Route the new hose along the same path as the old one, using the same clips and brackets. Do not bend the hose sharply or allow it to touch hot engine surfaces or moving belts. Position the hose so it does not rub against other components as the engine and steering move.
Insert the fitting at one end into the pump or gear connection point. Thread the bolt or nut by hand first to avoid cross-threading. Tighten it snugly with a wrench, but do not over-tighten, which can crack the fitting. Repeat at the other end. If your hose uses a banjo bolt, make sure the small hole in the fitting lines up with the passage in the pump or gear before tightening.
Refill and bleed the system
Lower the vehicle to the ground if you raised it. Remove the reservoir cap and pour in the correct power steering fluid until it reaches the full mark on the dipstick or the line inside the reservoir. Do not overfill. Replace the cap.
Start the engine and let it idle for 30 seconds. Turn the steering wheel slowly from lock to lock (all the way left, then all the way right) three or four times while the engine is running. This pushes air out of the system and fills the hose with fluid. Stop the engine and wait one minute. Check the fluid level again and top off if needed.
Repeat this process two or three times until the fluid level stays constant and you do not see air bubbles in the reservoir. If the steering wheel feels spongy or the pump makes a whining noise, air is still trapped in the system. Continue turning the wheel lock to lock until the feeling goes away.
Check for leaks and test the steering
With the engine off, inspect both hose fittings and the entire length of the hose for wet spots or drips. Wipe the hose dry with a clean rag, then start the engine and let it idle for two minutes while watching the hose. If fluid appears, the fitting is not tight enough. Turn off the engine, allow it to cool slightly, and tighten the fitting a quarter turn with a wrench. Repeat the test.
If the leak persists after tightening, the fitting may not be seated correctly. Turn off the engine, disconnect the hose, and inspect the fitting and the connection point on the pump or gear for debris or damage. Clean both surfaces and reconnect, ensuring the fitting is fully inserted before tightening.
Once no leaks appear, start the engine and turn the steering wheel gently in both directions. The wheel should turn smoothly without stiffness or grinding sounds. Listen for whining from the pump, which indicates air is still in the system or the fluid level is low. Check the reservoir one more time and top off if needed. Take the vehicle for a short test drive on a quiet road, turning the wheel at different speeds to confirm normal operation.
When to take the car to a shop instead
If the hose is located in a tight space that requires removing the engine, radiator, or other major components, a shop can access it faster than you can. If you do not have a hose crimper and cannot rent one, a shop has the tool on hand. If the steering feels stiff even after bleeding the system, or if the pump makes a loud whining noise that does not go away, the problem may be deeper than a hose replacement — the pump itself may be failing, and a shop can diagnose this.
If you discover that the hose fittings are damaged or the connection points on the pump or gear are stripped, a shop can often repair or replace those components as part of the hose job. Attempting to force a fitting onto a damaged connection can cause more expensive damage.
Frequently Asked Questions
How do I know if it is the high-pressure hose or the return hose that is leaking?
The high-pressure hose is usually smaller in diameter and runs from the pump to the steering gear. It is more likely to fail because it carries fluid at high pressure. The return hose is larger and softer and runs from the gear back to the reservoir. If you see fluid spraying or misting, it is the high-pressure hose. If you see a slow drip, it could be either one. Trace both hoses with your hands while the engine is off to find the wet spot.
Can I drive the car with a leaking power steering hose?
You can drive it, but the steering will become progressively stiffer as you lose fluid. If you lose too much fluid, the pump can run dry and fail, which is more expensive to repair than replacing the hose. If the hose is leaking, replace it or have it replaced before the fluid level drops below the minimum mark on the reservoir.
What if the hose is still leaking after I tighten the fittings?
The fitting may not be seated correctly, or the hose itself may have developed a second leak. Disconnect the hose, inspect both fittings and the connection points on the pump and gear for debris, cracks, or damage. Clean everything with a rag and reconnect. If the leak continues, the hose material may be defective or the fitting may be damaged. Replace the hose or have a shop inspect it.
Do I need to replace the power steering fluid after replacing the hose?
You do not need to do a complete fluid flush unless the old fluid is very dark or smells burnt. Topping off the reservoir with fresh fluid of the correct type is usually enough. If you drained most of the old fluid into a pan during removal, you can pour it back in if it is clean. If it is dirty or has debris in it, discard it and use new fluid.
How long does it take for a shop to replace a power steering hose?
Most shops can complete the job in one to two hours of labor, depending on hose location and whether they need to make new fittings. Add time if the hose is difficult to access or if the pump or gear connection is damaged. Call ahead and ask for an estimate based on your vehicle model.