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BMW E46 Brake Pad Sensors

BMW E46 Brake Pad Sensors BMWs are built with a wear indicator for the front and rear brake pads. When the pad wears to a certain point, the metal of the brake rotor will contact the sensor and trip the [BRAKE] light on your dash. This is an indication that your pads are low and need to be replacement soon. It's impossible to know exactly how many miles are left so have a shop inspect the pads and make recommendations for additional brake work to have done. Remember that if the dash light comes on then the sensor needs to be replaced in addition to the pads. Most BMWs have one sensor in the front (left-front) and one in the rear (right rear) since pads are replaced in axle sets only.
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URO Brake Pad Wear Sensor - Front - E46 330/M3

Replacement pad wear sensor, typically replaced when changing brake pads. If your brake lining warning is activated, the sensor will need to be replaced.

E46 330/M3 (also fits 325Xi) Front Brake Pad Sensor. Only one sensor required for front. 

This item fits the following BMWs:
1999-2005 E46 BMW 325xi 330i 330ci 330xi M3

URO
Part #: 34356751311
Price: $5.95 (USD) 
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URO Rear Brake Pad Wear Sensor

Replacement pad wear sensor, typically replaced when changing brake pads. If your brake lining warning is activated, the sensor will need to be replaced.

E46 M3 Rear Brake Pad Sensor. Only one sensor required for front.  

This item fits the following BMWs: 
1999-2005  E46 BMW  M3

URO
Part #: 34352229780
Price: $5.99 (USD) 
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Genuine BMW Front Brake Pad Wear Sensor - 34356751311 This allows your car to sense when your brake pad is too thin and alert you. Thin brake pads can lead to multiple issues including uneven wear and higher pad temperatures.
Genuine BMW
Part #: 34356751311
Price: $19.91 (USD) 
$23.06 (14% off MSRP)
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Bowa Brake Pad Wear Sensor - Front - E46 323i/ci/ 325i/ci 328i/ci E46 all (except 330/M3, or all Xi) Front Brake Pad Sensor. Only one required for front brakes.

This item fits the following BMWs:
1999-2005  E46 BMW  323i 323ci 325i 325ci 328i 328ci
2003-2006  Z4 BMW  Z4 2.5i Z4 3.0i
Bowa
Part #: 34351164371
Price: $10.57 (USD) 
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