Guide to the 2005-2011 BMW M5 Disc Brake Pad Wear Sensor
Don't let a simple sensor warning sideline your M5; understand your replacement options before you buy.
- Your 2005-2011 M5 has two wear sensors, one front and one rear, which are single-use items.
- If the brake warning light is on, the sensor must be replaced along with the brake pads.
- OEM-equivalent brands like Pagid, Brembo, and Textar offer the best quality for aftermarket prices.
- After replacement, the service light must be reset via the instrument cluster; failure to reset may indicate a faulty new sensor.
Understanding the Brake Pad Wear Sensor in Your E60 M5
The brake pad wear sensor is a simple but essential maintenance part. Think of it as a one-time-use fuse. Once it wears through and triggers the warning light on your dashboard, it cannot be reused and must be replaced. This is why it's standard practice to replace the sensor every time you replace your brake pads, especially if the warning light was on. Your M5 uses one sensor on the front axle (driver's side) and one on the rear axle (passenger side) to monitor pad life.
Don't Ignore the Warning Light
While the warning light itself is not a critical failure, it signals that your brake pads have reached their minimum recommended thickness. Continuing to drive for an extended period can lead to complete wear of the pad material, causing metal-on-metal contact between the backing plate and the rotor. This will severely reduce braking performance and cause expensive damage to your brake rotors.
🎬 Learn how to fix your brake pad warning light permanently.Choosing the Right Aftermarket Sensor
When it comes to a straightforward part like a wear sensor, you don't always need to pay a premium for a Genuine BMW part. Many aftermarket brands produce high-quality sensors that meet or exceed OEM specifications, often because they are the original equipment manufacturer for BMW. However, quality can vary, so it's important to choose a reputable brand.
Brand Quality Tiers for Your M5
- OEM-Equivalent Brands: Brands like Pagid, Brembo, and Textar are often the original suppliers to BMW. Choosing one of these ensures you get a part with the same fit and quality as the original without the dealership price tag. Bowa is also noted as a reliable OEM-quality manufacturer.
- Quality Aftermarket Brands: Companies like Beck Arnley, Centric, Standard Ignition (SMP), and Vemo have a solid reputation in the industry. They provide reliable sensors that are a good balance between cost and quality.
- Value-Oriented Brands: Brands such as URO Parts and Dorman offer the most budget-friendly options. While they can save you money, some owners have reported issues with fitment or premature failure with lower-cost parts. These can be a viable option, but be aware of the potential for mixed quality.
A Note on Resetting the Light
After replacing the sensor and pads, the brake service light on your iDrive must be reset. This can usually be done through a sequence of button presses on the instrument cluster. 🎬 Watch how to reset your brake light without scan tools. However, if the reset procedure fails, it could indicate a faulty new sensor (a known issue with some cheaper aftermarket parts) or an issue with the wiring.
Common Ordering Mistakes
The most common mistake is ordering the wrong sensor for the axle. The front and rear sensors for the E60 M5 have different lengths and part numbers. Always verify the part number and fitment for your specific vehicle's front or rear axle before purchasing. The front sensor is typically located on the left (driver's side) wheel, and the rear sensor is on the right (passenger side) wheel.
| Part Type | Estimated Price Range |
|---|---|
| New OEM (Genuine BMW) | $30 - $50 per sensor |
| New Aftermarket | $16.66 - $39.86 per sensor |
| Shop Labor (Sensor Only) | $50 - $100 |
Frequently Asked Questions
How many brake pad sensors does a 2005-2011 M5 have?
Your M5 is equipped with two brake pad wear sensors: one for the front brakes and one for the rear brakes.
Do I have to replace the sensor if the warning light isn't on?
If the warning light has not been triggered, you can sometimes reuse the old sensor. However, the plastic often becomes brittle with age and can easily break during removal. Given their low cost, it is highly recommended to replace them with every brake pad change to avoid issues.
Can I bypass the brake pad wear sensor?
Some owners choose to bypass the sensor by cutting the wires and connecting them to complete the circuit. While this will turn off the warning light, it is not recommended. Doing so eliminates the system's ability to warn you when your pads are low, requiring you to perform frequent manual inspections to ensure safety.
Why won't my brake warning light reset after replacing the sensor?
This is a common issue. It can be caused by a faulty new aftermarket sensor, which is more common with cheaper brands. It can also happen if the reset procedure is not performed correctly or if there's a problem in the wiring between the sensor and the control module. Ensure the parking brake is disengaged 🎬 Follow this step-by-step guide to reset your brake service light. during the reset attempt.
Helpful Videos
Technical Specifications
OEM Part Numbers: 34356789492 (Front) 34356789493 (Rear) 34356762253 (Replaced by 34-35-6-789-445)
The E60 M5 uses a two-stage contact sensor. There is one sensor for the front axle and one for the rear axle. They are not interchangeable.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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