Parts Catalog Accessories Catalog Tech Info Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Front Brake Duct Replacement
 
Bookmark and Share

Pelican Technical Article:

Front Brake Duct Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$100

Talent:

***

Tools:

Set of sockets, wrenches, screwdrivers, floor jack, two jack stands, two wheel chocks, safety glasses, lug wrench

Applicable Models:

BMW X5 (2000-06)

Parts Required:

Brake duct, splash shield, plastic rivets

Hot Tip:

Have a universal 8mm socket on hand to save time

Performance Gain:

Proper brake cooling

Complementary Modification:

Replace lower front wheel well liner trim or splash shield if damaged

The disc brakes on your BMW E53 are extremely efficient for slowing down and stopping the vehicle under most routine conditions. The friction of brake pads against the brake rotors (discs) heats up the brakes: The kinetic motion of the moving vehicle is converted to thermal energy. Slowing down from a high speed drive, controlling the speed of descent through a long downhill, repeated high speed stops, or an emergency braking situation all contribute to a great deal of brake heating. Hot brake rotors can warp, causing uneven braking. Brake pads that are heated beyond a certain point are less effective. And finally, enough heat in the brakes may boil the brake fluid; this causes major loss of braking power.

The brake rotors are designed to dissipate much of this heat as they spin through the air. An additional and important source of brake rotor cooling air is the brake cooling ducts, located in the right and left corners of the front bumper. Each duct sends cooling air to the brake rotor, improving brake performance. If a duct is damaged, brake performance can suffer, especially under repetitive braking situations. Impact with a parking block, curb, or large speed bump can damage a brake duct and the lower splash shield. This repair can be done by removing the front wheel and working in the wheel well.

Remember that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Start by loosening the wheel bolts on the side of the vehicle that you are replacing the brake duct. Do not remove the bolts. Just break the bolts free. Raise the vehicle off the ground and support it safely using a jack stand. Remove the wheel bolts and remove the wheel. See our article on jacking up your vehicle for more info.

Remove the engine splash shield. See our tech article on engine splash shield removing.

Remove the wheel well liner on the side of the vehicle you are replacing the brake duct on. See our tech article on wheel well liner replacing.

I will be replacing the duct on the left side of the vehicle.
Figure 1

I will be replacing the duct on the left side of the vehicle. The right side is similar, except it doesn't have an ambient air temperature sensor in the duct. The brake duct feeds air from the front bumper (blue arrow) and directs it to the brake rotor area (red arrow).

With the wheel well liner removed, you now have access to the brake duct (red arrow).
Figure 2

With the wheel well liner removed, you now have access to the brake duct (red arrow). First you have to remove the ambient air temperature sensor. It is fed through a rubber grommet (blue arrow) in the duct.

The red arrow points to the rubber grommet.
Figure 3

The red arrow points to the rubber grommet. The blue arrow points to the ambient air temperature sensor mounted inside the brake duct. Reach inside the duct and pull the sensor straight out of the mount.

Then, pull the rubber grommet out of the duct and remove the sensor and wiring harness out of the brake duct.
Figure 4

Then, pull the rubber grommet out of the duct and remove the sensor and wiring harness out of the brake duct. You can leave the sensor electrical connector attached.

Working through the front bumper grille, use a trim panel tool to lever out the center plastic rivet (red arrow).
Figure 5

Working through the front bumper grille, use a trim panel tool to lever out the center plastic rivet (red arrow). The inset photo shows the plastic rivet pulled out. Once the center is out, lever the bottom portion of the rivet out of the duct.

Working at the brake duct, remove the two 8mm fasteners (red arrows).
Figure 6

Working at the brake duct, remove the two 8mm fasteners (red arrows).

Pull the duct down away from the bumper to detach it.
Figure 7

Pull the duct down away from the bumper to detach it. Pull it down on an angle, detaching the top first, then the bottom. Remove it from the vehicle. When installing the front brake duct, be sure the plastic rivet is properly seated. Install the brake duct fasteners, the air temp sensor and reassemble the wheel well liner.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location] [Careers]

Copyright © Pelican Parts Inc.

Page last updated: Mon 12/5/2016 02:43:06 AM