Bmw e90 brake pad replacement – e91, e92, e93 pelican parts diy maintenance article gas under 3 dollars

You should check your brake pads every time you service your BMW E90. Replace your brake pads if thickness is 2.4 mm (0.09 in.) or below. There are brake pad wear sensors that trigger a warning light when pads reach the minimum, however the sensor is only located on one brake per axle. This leaves 3 brake pads on each axle that is not monitored by the warning system. This is why periodic inspections are required. When replacing your brake pads, you can replace 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 new pads when reused. On late model BMW models, including E90, the brake pad wear sensor has been updated. It is now more dedicated and prone to breaking when removed. The sensor is no longer a simple wire circuit that is broken when pad wear hits minimum, it is now a two-stage wear sensor. This provides the vehicle with more accurate brake pad monitoring. So if the sensor shows the slightest bit of wear, replace it.

Comments: Mystery solved. The wires on the new rear sensor had broken when going over a bump. I did learn however that the sensors have 2 wear stages. When new, they are closed circuit +/- zero ohms. At a certain point wire of the closed circuit wears and a 470 ohm resistor is in circuit. Finally when fully worn they are open circuit.

Comments: My brake pad warning light came on and went off a few times and then stayed on. I still have 6mm left on the front pads but I can see that the sensor is worn.Strange! I have replaced the sensor but have not inserted it in to the brake pad as I will run the pads down to 2.5mm and then replace. I still cannot reset the warning light.Does the sensor have to contact the pad to reset?

Comments: Hello Nick, I have run-flats my car 2006 BMW 325i it came with no jack; what model of floor jack would you recommend? I dont wanna be smashed on first use, lol! Also a link to pads and rotors on your site would be appreciated. : Thank you

Comments: I have an E90 325i Sports set up with 18" rims staggered- front 255/40/18 and rear 235/35/18- I’ve opted to swap to non RFT tyres.. now I need a spare tyre- the donuts seem to me area waste of money given their thread and tyre size- what is the minimum size spare wheel/tyre can I use as spare for this set up?

Followup from the Pelican Staff: A small 17" wheel and tire should fit in truck, but you will lose a lot of storage space. You can buy a spare tire kit. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.

Comments: I just replaced front rotors and pads all Pagid on my 2006 E90, and now have a squeal once the brakes have warmed up a bit 5 to 10 minutes of driving. I’ve replaced brakes on this vehicle since it was new and never had this problem. The only thing I can think of that I did differently was used lube on the anti-rattle clip. Could that cause a problem?

Comments: It turns out, I had to have both sensors front and rear shorted out to be able to reset the warning and miles, where as I first shorted the front then the rear and it did not work. so for anyone else who has this problem and tried all other options ensure both sensors are replaced or shorted at the same time and then reset.

Comments: Hello I have a BMW 335d 2006 my pads and disks are fine I tried to reset my service light but I also reset my brake pad sensors by accident, as soon as i did this the fault come on the dash that they need replacing now and the milage was showing —. it now tells me to go to bmw to change pads. I tried to short the sensors but this doesn’t work it just shows —- when i try to reset either the front or rear. Will new sensors remedy this problem ? how does the computer know they arent new sensors when I un plug and replug the old sensors …Thanks

Followup from the Pelican Staff: If the sensors are in good shape, the light should go off when you reset it. It is a simple circuit the DME doesn’t know old or new, only circuit integrity. The sensor operates similarly to this: http://www.pelicanparts.com/techarticles/MINI_R56/09-BRAKES-Brake_Pad_Sensor_Testing/09-BRAKES-Brake_Pad_Sensor_Testing.htm – Nick at Pelican Parts

Comments: ’09 E90 335i – Is there a way to code out the brake sensor error/warning completely??? It is idiotic to have a sensor tell you when to change the brakes. It only adds needless complexity and expense. They get inspected yearly at minimum where I am any way. How about just tucking them up out of the way where it never gets used/worn out??

Followup from the Pelican Staff: I believe that paste is used for the back side of the pad, where the caliper makes contact, to remedy noise complaints. However, is rarely helps with noise, most noise is caused by pad compound, not movement. – Nick at Pelican Parts

Comments: I replaced rear pads, rotors, and ware sensor on my 2006 325 xi sports wagon. the sensor wire disappears up and behind a splash guard under the rear end of the car. I cant see the little box where the wear sensor connects. where is the connector box?

Comments: It’s worth noting that the brake caliper mounting fasteners Figure 5 are different lengths. I removed them fully to lubricate and did not notice, but was able to find elsewhere that the longer one should be installed in the lower position closer to the ground.