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Brake Pads Replacement
 
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Pelican Technical Article:

Brake Pads Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$200

Talent:

***

Tools:

7mm Allen bit, flathead screwdriver, brake piston compressor, set of sockets

Applicable Models:

BMW X5 (2000-06)

Parts Required:

Front or rear brake pads, brake pad wear sensors, brake fluid, brake cleaner

Hot Tip:

Stay clear of brake dust

Performance Gain:

Proper brake function

Complementary Modification:

Flush the brake fluid and replace the brake rotors

You should check your brake pads every time you service your BMW E53. Replace your brake pads if the thickness is 2.4 mm (0.9 in.) or below. There are brake pad wear sensors that trigger a warning light when the pads reach the minimum. However the sensor is only located on one brake per axle. This leaves 3 brake pads on each axle that are not monitored by the warning system. This is why periodic inspections are required. When replacing your brake pads, you can replace the pads on one axle at a time. Have a new brake pad wear sensor handy. Even though the sensor may be reused, they become brittle and do not always fit tightly into the new pads when they are reused.

In this article, I will show you how to replace the brake pads on the front axle of your vehicle. Replacing the rear brake pads is similar.

Lift and support the axle of the vehicle you are replacing the brake pads on. See our tech article on jacking up your vehicle.

Remove the wheels on the axle you are replacing the brake pads on.

Using a flathead screwdriver, remove the brake caliper anti-rattle spring (green arrow) by prying it out while securing it with your hand.
Figure 1

Using a flathead screwdriver, remove the brake caliper anti-rattle spring (green arrow) by prying it out while securing it with your hand. The spring can pop off and go flying. Be sure to hold it steady.

Pull the brake pad wear sensor (green arrow) out of the driver side brake pad.
Figure 2

Pull the brake pad wear sensor (green arrow) out of the driver side brake pad. Be very careful as the sensor tends to break when removed. I like to use a pair of needle nose pliers to pull the sensor out.

Using a flathead screwdriver, slowly press the brake caliper piston in.
Figure 3

Using a flathead screwdriver, slowly press the brake caliper piston in. This allows the brake caliper to be pulled off the brake rotor more easily. I like to pry between the outer brake pad and brake rotor. This way there is less chance of damaging the caliper piston.

Remove the rubber plugs from the brake caliper mounting fasteners (green arrows).
Figure 4

Remove the rubber plugs from the brake caliper mounting fasteners (green arrows).

Next, using a 7mm Allen bit, remove the brake caliper mounting fasteners (green arrows).
Figure 5

Next, using a 7mm Allen bit, remove the brake caliper mounting fasteners (green arrows).

Working behind the front strut (yellow arrow), open the plastic door (green arrow) for the brake pad wear sensor electrical connector.
Figure 6

Working behind the front strut (yellow arrow), open the plastic door (green arrow) for the brake pad wear sensor electrical connector.

Disconnect the brake pad wear sensor electrical connector by pressing the release tab and pulling it apart.
Figure 7

Disconnect the brake pad wear sensor electrical connector by pressing the release tab and pulling it apart. Remove the brake caliper from the mounting bracket. Do not allow the brake caliper to hang from the brake hose. Secure it to the vehicle using a piece of a metal coat hanger or a strong bungee cord.

Remove the brake pads from the brake caliper.
Figure 8

Remove the brake pads from the brake caliper. Then press the piston back into the caliper using a brake caliper piston tool. Install new brake pads into the caliper and caliper mounting bracket. Install the caliper to the mounting bracket and tighten the fasteners. Then install the rubber plugs. Connect the pad wear sensor electrical connector and route the wiring harness as before. Install the brake pad wear sensor into the brake pad. Install the brake pad anti-rattle clip by pressing it into the caliper and pushing it down to confirm it is properly seated. Once the calipers are installed and the fasteners are tight, press the brake pedal to pump the brakes up. Once the brake pedal is hard to push, install the wheels and check the brake operation of your vehicle.

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Page last updated: Mon 12/5/2016 02:36:53 AM