- Shop
- /
- Emission Control
- /
- Sensors
- /
- Ignition Knock (Detonation) Sensor
Ignition Knock (Detonation) SensorHella BehrPart # 009108821
Ships in 24 hours
Order soon only 1 left In Stock

Built on trust. Stocked and shipped from our U.S. distributors.
All parts come with easy returns, full warranty and money back guarantee.
Learn MoreDetails:
The HELLA Ignition Knock Sensor detects engine vibrations to prevent knock and optimize performance. It features corrosion-resistant terminals and durable coatings, and is engineered to meet or exceed OE standards for reliable, long-lasting engine protection.
Provides accurate detection of engine knocking, safeguarding engine components from potential damage with precision vibration monitoring.
Ensures reliable performance in demanding environments with construction specifically designed to endure high temperatures and chemical exposure.
Offers universal compatibility, ensuring seamless integration with most modern vehicles.
Withstands harsh underhood conditions, enabling consistent long-term operation due to corrosion-resistant terminals and durable coatings.
Meets or exceeds OE standards, ensuring dependable and consistent knock detection aligned with automotive manufacturer requirements.
Warranty
Product Details:
| California Proposition 65 Required | No |
| Sensor Type | PiezoElectric Sensor |
| Number of pins | 2 |
| Assy/Disassy by Qualified Personnel Required! | . |
| Tightening Torque [Nm] | 20 |
| Supplementary Article/Info 2 | without Cable |
$53.68
Warranty
12 month/24K Miles
QTY

Built on trust. Stocked and shipped from our U.S. distributors.
All parts come with easy returns, full warranty and money back guarantee.
Learn MoreDetails:
The HELLA Ignition Knock Sensor detects engine vibrations to prevent knock and optimize performance. It features corrosion-resistant terminals and durable coatings, and is engineered to meet or exceed OE standards for reliable, long-lasting engine protection.
Provides accurate detection of engine knocking, safeguarding engine components from potential damage with precision vibration monitoring.
Ensures reliable performance in demanding environments with construction specifically designed to endure high temperatures and chemical exposure.
Offers universal compatibility, ensuring seamless integration with most modern vehicles.
Withstands harsh underhood conditions, enabling consistent long-term operation due to corrosion-resistant terminals and durable coatings.
Meets or exceeds OE standards, ensuring dependable and consistent knock detection aligned with automotive manufacturer requirements.
Product Details:
| California Proposition 65 Required | No |
| Sensor Type | PiezoElectric Sensor |
| Number of pins | 2 |
| Assy/Disassy by Qualified Personnel Required! | . |
| Tightening Torque [Nm] | 20 |
| Supplementary Article/Info 2 | without Cable |
Our Parts
Your mechanic’s suppliers are our suppliers. Our parts come from the same trusted distributors that supply professional shops nationwide. That means factory-fresh OEM and premium aftermarket parts from authorized channels only. Every order ships from U.S. warehouses.
We partner exclusively with reputable U.S. companies so you can buy with confidence. Every part is new and original from the manufacturer, covered by full warranties, plus our money-back guarantee.
FAQ
Genuine only. We source through the largest U.S. distributors that supply professional shops nationwide. Parts are new and original from the manufacturer, from authorized channels only. No marketplace sellers. No gray imports.
Buy With Confidence
Massive Selection:
Access 400+ trusted brands and thousands of parts—if it fits your vehicle, we’ve got it.

Lightning-Fast Shipping:
Get back on the road sooner with same-day or next-day shipping on most orders.

Expert Support, Anytime:
Our team of real mechanics and parts pros delivers immediately.

Peace-of-Mind Warranty:
Every part is backed by our industry-leading 12 month 24,000 mile warranty.
All your favorite brands in one place




















+ 400 more

The Smarter Way to Get Parts
Partnered with 400+ global suppliers, offering 1 million+ parts with same or next day shipping, and backed by a 12-month / 24,000-mile warranty—HowToo makes getting the right part fast, reliable, and hassle-free. Expert support and install guidance included, every time.
$53.68
Warranty
12 month/24K Miles