Discover the Secret to Changing Your BMW E90 Power Steering Pump Like a Pro – Learn How to Change Power Steering Pump BMW E90

Are you experiencing a frustratingly stiff steering wheel in your BMW E90? A groaning sound when you turn? These could be signs of a failing power steering pump, a crucial component for smooth and effortless driving. While the thought of tackling this repair might seem daunting, it’s actually a DIY project within reach for many car owners. This comprehensive guide will walk you through the process of how to change power steering pump BMW E90, equipping you with the knowledge and confidence to tackle this common maintenance task.

Why Your Power Steering Pump Might Be Dying

Before diving into the replacement process, let’s understand why your E90’s power steering pump might be on the fritz.

• Worn-out Seals: Over time, the seals inside the pump can wear out, allowing fluid to leak out. This loss of fluid reduces the pump’s effectiveness and can lead to a noisy operation.
• Bearing Failure: The pump’s bearings, responsible for smooth operation, can wear down, causing grinding noises and eventually leading to pump failure.
• Fluid Contamination: Contaminated power steering fluid can damage the pump’s internal components, leading to reduced performance and eventual failure.

Essential Tools and Supplies for the Job

Before you get started, make sure you have the following tools and supplies readily available:

• New Power Steering Pump: Ensure you purchase a compatible pump for your specific BMW E90 model year.
• Power Steering Fluid: Use the correct type of fluid recommended by BMW for your E90.
• Fluid Catch Pan: This will collect the old power steering fluid during the draining process.
• Torque Wrench: Essential for tightening bolts to the correct specifications.
• Jack and Jack Stands: For safely lifting the vehicle.
• Socket Set: To remove and install various bolts and nuts.
• Wrench Set: For loosening and tightening components.
• Flat-Head Screwdriver: For removing plastic covers and clips.
• Gloves: To protect your hands from oil and grime.
• Safety Glasses: To protect your eyes from flying debris.

Step-by-Step Guide to Replacing the Power Steering Pump

Now, let’s get into the nitty-gritty of replacing the power steering pump in your BMW E90.

1. Preparation:

• Safety First: Always park your vehicle on a level surface, engage the parking brake, and chock the rear wheels.
• Fluid Drain: Remove the cap from the power steering reservoir and drain the old fluid into the catch pan.
• Disconnect Battery: For safety, disconnect the negative terminal of the battery to prevent accidental electrical shock.

2. Accessing the Pump:

• Remove Air Intake: Detach the air intake system to gain access to the power steering pump.
• Locate the Pump: The power steering pump is usually situated on the front of the engine, near the driver’s side.
• Disconnect Hoses: Carefully remove the hoses connected to the pump, ensuring you note their positions for reinstallation.
• Remove Mounting Bolts: Loosen and remove the bolts holding the pump to the engine block.

3. Replacing the Pump:

• Install New Pump: Position the new power steering pump in place, aligning the mounting holes.
• Secure the Pump: Tighten the mounting bolts to the specified torque using the torque wrench.
• Reconnect Hoses: Carefully reattach the power steering hoses to the new pump, ensuring they are properly seated.

4. Refill and Bleed the System:

• Refill Reservoir: Pour the new power steering fluid into the reservoir until it reaches the “FULL” mark.
• Bleed the System: Start the engine and turn the steering wheel from lock to lock several times to bleed air from the system.
• Check Fluid Level: Turn off the engine and check the fluid level again. Top it off if necessary.

5. Final Touches:

• Reconnect Battery: Reconnect the battery’s negative terminal.
• Reassemble Components: Reinstall all removed components, ensuring everything is securely fastened.
• Test Drive: Take your BMW E90 for a short test drive to ensure the steering operates smoothly.

Troubleshooting and Tips

• Fluid Leak: If you notice a fluid leak after installing the new pump, double-check the hose connections for proper tightness.
• Air in the System: If the steering feels sluggish or noisy, there might be air trapped in the system. Repeat the bleeding process.
• Steering Wheel Stiffness: If the steering wheel remains stiff, ensure the new pump is compatible with your E90 model.

Time to Take the Wheel: A Final Drive

You’ve successfully tackled the power steering pump replacement! Now, you can enjoy a smooth, responsive steering experience in your BMW E90. Remember, regular maintenance and proper fluid levels are key to preventing future issues.

What You Need to Learn

1. How often should I change the power steering fluid?

It’s generally recommended to change the power steering fluid every 30,000 to 50,000 miles or according to your vehicle’s maintenance schedule.

2. What are the signs of a failing power steering pump?

Signs include a stiff steering wheel, groaning noises when turning, fluid leaks, and a whining sound from the pump.

3. Can I use any power steering fluid in my BMW E90?

No, it’s crucial to use the specific type of power steering fluid recommended by BMW for your E90 model.

4. Is it difficult to change the power steering pump?

While it’s not the easiest DIY repair, it’s achievable with the right tools and a bit of patience. If you’re unsure, it’s always best to consult a professional mechanic.

5. How much does it cost to replace a power steering pump?

The cost of replacing a power steering pump can vary depending on the specific model, labor costs, and parts. However, doing it yourself can save you a significant amount of money compared to taking it to a shop.