Topfactory Knock Sensor: Engine performance optimization
Engine knocking is the automotive equivalent of a bad cough—it signals trouble deep within. The knock sensor is the engine's stethoscope, listening for that telltale pinging caused by uneven fuel combustion. When it detects trouble, it sends an alert to the engine control unit (ECU), which tweaks the ignition timing on the fly. This quick fix prevents damage, boosts efficiency, and keeps your ride humming smoothly—saving you money on fuel, cutting emissions, and prolonging engine life.
This little gadget is a perfect fit for a range of General Motors workhorses, from Buicks and Chevys to Cadillacs, GMCs, Pontiacs, and even Hummers. It's a direct swap for OEM codes like 12589867 and 12601822, making upgrades a breeze. In practice, slapping in a new sensor can banish woes like sluggish acceleration, power dips, or that annoying check engine light. Think of it as a tune-up in a box: regular swaps ward off pricey overhauls and keep your car purring like it just rolled off the lot.
- Compatible with multiple vehicle brands
- Easy installation process
- Durable construction
- Accurate knock detection
- Engine performance optimization
General specs
- Brand: Topfactory
- Seller: Joom
- Compatibility: Buick, Chevy, Cadillac, GMC, Pontiac, Hummer
- Part Numbers: 12589867, 12601822
- Quantity: 2 pieces
- First listed by seller: 8/24/25
If you are interested in more details, you can find full information on the seller's page.
View on seller's site
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$39.44
Last price update: 8/24/25
Available to order
Shipping options
Delivery to 
United States
United States
Unavailable
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Knock Sensor Engine performance optimization
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Crash Impact 77930-SNA-A320 Accurate engine knock detection
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feiyanautoparts 10456520 Accurate engine timing
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apadautoparts 05033307AC Precise engine timing
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Automotivemechanicalcomponents 55565708 Dual sensor set for intake and exhaust
|
Fuel Injection Pressure Sensor Compatible with multiple vehicle models
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| Brand | Topfactory | Crash Impact | feiyanautoparts | apadautoparts | Automotivemechanicalcomponents | Mlina-J |
| Model | 77930-SNA-A320 | 10456520 | 05033307AC | 55565708 | ||
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| Price | $39.44 | $61.86 | $28.44 | $22.89 | $31.29 | $37.02 |
| Seller | Joom | Joom | Joom | Joom | Joom | Joom |
| Update | August 17, 2025 | August 17, 2025 | August 15, 2025 | August 16, 2025 | August 15, 2025 | August 17, 2025 |
| Compatibility | Buick, Chevy, Cadillac, GMC, Pontiac, Hummer | Honda Civic 2006-2011 | Chevrolet | Chrysler, Dodge, Fiat, Jeep, Lancia | Chevrolet vehicles | Chevrolet Avalanche, Chevrolet Camaro, Chevrolet Caprice, Chevrolet Captiva Sport, Chevrolet Corvette, Chevrolet Equinox, Chevrolet Express 1500, Chevrolet Impala, GMC, Hummer, Saturn |
| Function | Detects engine knocking | Monitors crankshaft position and speed | Monitors crankshaft position and speed, Sends data to engine control unit | Monitors fuel pressure in injection system | ||
| Installation | Direct replacement, Easy to install | Requires basic tools | Direct replacement for OEM parts | |||
| Part Number | 10456520 | 05033307AC | 55565708 | |||
Knock Sensor
$39.44
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