Says I need to spend over $1000 to replace all 4 brake pads and rotors

Hi,

Replacing front brake pads and rotors really isn't too hard. You can expect to get around 25,000 miles from a set of pads, but that is based on driving habits and terrain. Changing them yourself can save you a lot. If you get lifetime parts from a parts store and do it yourself, you shouldn't have to pay for brake pad replacement again.

First, here is a link that shows in general how the process is done:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

Here are the directions specific to your vehicle. The attached pics correlate with the directions.

_______________________________

2006 BMW Z4 3.0si Coupe (E86) L6-3.0L (N52)
Removing and Installing/Replacing Brake Linings of Both Front Disk Brakes
Vehicle Brakes and Traction Control Disc Brake System Brake Pad Service and Repair Procedures Front Removing and Installing/Replacing Brake Linings of Both Front Disk Brakes
REMOVING AND INSTALLING/REPLACING BRAKE LININGS OF BOTH FRONT DISK BRAKES
34 11 000 Removing and installing/replacing brake linings of both front disk brakes

Note:
After completing the tasks, press brake pedal several times to the floor so that brake linings contact brake disks.
When installing new brake linings on front and rear axles, check brake fluid level; top up to "MAX" marking if necessary.
Remove wheels.

pic 1

Lift out retaining spring (1).
Left:
Disconnect plug connection for brake lining wear sensor.
If necessary, replace brake lining wear sensor.

pic 2

Remove plastic plugs (2).

pic 3

Unfasten guide screws (1) and lift out brake caliper towards rear of vehicle. Do not allow brake caliper to hang from brake hose, risk of damage to brake hose.
Installation: Only clean guide screws; do not grease.
Check threads.
Replace all guide screws which are not in perfect condition.

pic 4

Turn piston fully back with special tool 34 1 050.

Important:
When turning back the piston, watch the brake-fluid level in the expansion tank, as overflowing brake fluid will destroy the paintwork.

pic 5

Remove outer brake lining.
Inner brake lining is located with its spring in the piston.

Important: Mark any worn brake linings.

In the event of one-sided brake lining wear, do not change brake linings round.
New brake linings may only be installed if the brake disk thickness is greater than or equal to the minimum brake disk thickness (MIN TH).
Observe minimum thickness of brake linings,
Clean brake linings.
Do not grease backs of brake linings sleeve.

pic 6

Check dust sleeve (1) for damage and replace if necessary.
Clean contact face (2) of brake piston and apply a thin coating of anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids.

Important: Dust sleeve must not come into contact with anti-squeak compound as this may cause the dust sleeve to swell.

pic 7

Clean contact faces (1...2) of brake lining hammer heads/brake caliper housing and coat with anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids.

pic 8

Clean contact face (3) of brake caliper and apply a thin coating of anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids.

pic 9

Clean contact face of brake caliper mounting bracket and apply a thin coating of anti-squeak compound.
Anti-squeak compound, refer to BMW Service Operating Fluids.

_________________________________

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe