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Standard IgnitionPart #: PWS121
Standard Ignition PWS121 Disc Brake Pad Wear Sensor - Rear
⚙️ 7 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$25.84Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, 528i and 540i
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Disc Brake Pad Wear Sensor options
Standard Ignition PWS121 Disc Brake Pad Wear Sensor - Rear
| Brand | Standard Ignition |
| Part Number | PWS121 |
| Connector Gender | Female |
| Connector Quantity | 1 |
| Connector Shape | Round |
| Functions | Brake pad wear sensor |
| Harness Length - inches | 41 |
| Harness Length - mm | 1041.4 |
| Mounting Location | Brake caliper |
| Terminal Gender | Male |
| Terminal Quantity | 2 |
| Terminal Type | Pin |
This part fits 7 vehicles. Search below:
| Year | Make | Model | Body Type | Position | Notes |
|---|---|---|---|---|---|
| 2003 | BMW | 540i | Wagon | Rear | |
| 2002 | BMW | 540i | Wagon | Rear | |
| 2001 | BMW | 540i | Wagon | Rear | |
| 2000 | BMW | 528i | Wagon | Rear | |
| 2000 | BMW | 540i | Wagon | Rear | |
| 1999 | BMW | 528i | Wagon | Rear | |
| 1999 | BMW | 540i | Wagon | Rear |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
34351163207
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.