Mini Cooper S Faulty Power Steering Pump Keep Draining Battery: Diagnostic and Replacement Guide

If you own a Mini Cooper S, you may have experienced issues with the power steering pump. One common problem is that it drains the battery even when the car is turned off. In this blog post, we will go over the diagnostic process and provide a step-by-step guide on how to replace the power steering pump on your Mini Cooper S.

Diagnosing the Problem

Before replacing the power steering pump, it’s important to diagnose the issue properly. Here are a few steps you can follow to diagnose the problem:

Check the battery voltage

Before you start the car, check the battery voltage using a multimeter. If the voltage is below 12 volts, the battery may be weak and needs to be replaced.

Check for any electrical issues

 If the battery voltage is good, then the problem may be caused by an electrical issue. Check for any loose or frayed wires, damaged fuses, or any other electrical problems.

Check for power steering pump operation

Start the car and listen for any unusual noise coming from the power steering pump. If you hear a grinding or whining noise, the power steering pump may be failing.

Check for leaks

Check for any visible leaks around the power steering pump. A leak could indicate that the power steering pump is damaged and needs to be replaced.

Replacing the Power Steering Pump

If you have diagnosed the issue and determined that the power steering pump is the problem, then you can proceed with replacing it. Here’s how:


Removing the power steering pump: Locate the bolts that hold the power steering pump in place and remove them. Carefully remove the power steering pump from the engine.

Installing the new power steering pump: Install the new power steering pump by carefully placing it in place and securing it with the bolts.

Testing: Start the car and test the power steering system to make sure it’s working properly.


Power Steering Pump,Compatible for BMW Compatible for Mini Cooper R50 R52 R53 OE 32416778425
Power Steering Pump,Compatible for BMW Compatible for Mini Cooper R50 R52 R53 OE 32416778425    [ Buy Now ]

Replacing the power steering pump on a Mini Cooper S is a straightforward process that can be done with a few basic tools. By following the steps outlined in this guide, you should be able to diagnose and replace the power steering pump with ease. If you are unsure about your ability to perform this task, it is always best to consult with a professional mechanic.