How to service the Knock Sensor (KS) on the 4.0L SOHC engine on Ford Mustang?

The service of the Knock Sensor (KS) on the 4.0L SOHC engine requires removing the intake manifold as the first step. The Knock Sensor electrical connector needs to be separated before continuing. Uninstall the Knock Sensor by dislodging its securing bolt from the sensor itself. The Knock Sensor installation requires torqueing it up to 20 Nm (177 lb-in) followed by performing the reversal of the removal process for completion of the installation.

OEM Ford Mustang Knock Sensor

Engine Knock Sensor

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8 Knock Sensors found

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Ford Mustang Knock Sensor Part Number: AL3Z-12A699-A
$26.44 MSRP: $40.91
You Save: $14.47 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Replaces: AL3Z-12A699-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2023 Ford Mustang | Boss 302, Bullitt, EcoBoost, EcoBoost Premium, GT, GT 50 Years Limited Edition, GT Premium, Mach 1, Shelby GT350, Shelby GT350R, Shelby GT500 | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS, 8 Cyl 5.4 L GAS, 8 Cyl 5.8 L GAS
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Ford Mustang Knock Sensor Part Number: 2R3Z-12A699-AA
$31.02 MSRP: $48.00
You Save: $16.98 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010 Ford Mustang | Shelby GT500 | 8 Cyl 5.4 L GAS
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Ford Mustang Knock Sensor Part Number: 1S7Z-12A699-BB
$41.01 MSRP: $64.00
You Save: $22.99 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor; Sensor
- Replaces: 1S7Z-12A699-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2023 Ford Mustang | EcoBoost, EcoBoost Premium | 4 Cyl 2.3 L GAS
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Ford Mustang Knock Sensor Part Number: 4L3Z-12A699-AA
$55.59 MSRP: $88.27
You Save: $32.68 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2010 Ford Mustang | Bullitt, GT, Shelby GT, Shelby GT500, Shelby GT500KR | 8 Cyl 4.6 L GAS, 8 Cyl 5.4 L GAS
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Ford Mustang Knock Sensor Part Number: 1L2Z-12A699-AA
$96.98 MSRP: $154.00
You Save: $57.02 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Manufacturer Note: Dual headed Bolt on type sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2009 Ford Mustang | Bullitt, GT, Shelby GT | 8 Cyl 4.6 L GAS
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Ford Mustang Knock Sensor Part Number: 7T4Z-12A699-A
$55.53 MSRP: $88.18
You Save: $32.65 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Replaces: 7T4Z-12A699-AB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2017 Ford Mustang | Base, V6 | 6 Cyl 3.7 L GAS
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Ford Mustang Knock Sensor Part Number: XL3Z-12A699-BA
$45.32 MSRP: $70.73
You Save: $25.41 (36%)
ADD TO CART
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Ford Mustang | Base | 6 Cyl 4.0 L GAS
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Ford Mustang Knock Sensor Part Number: JR3Z-12A699-A
$22.67 MSRP: $36.00
You Save: $13.33 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2024 Ford Mustang | Dark Horse, Dark Horse Premium, EcoBoost, EcoBoost Premium, GT, GT Premium | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS

Ford Mustang Knock Sensor

OEM Knock Sensor boasts unmatched quality. Each part goes through full quality checks. They adhere to Ford's official factory standards. These steps remove flaws and inconsistencies. So you can get Knock Sensor with long life and a perfect fit. Come to our website and find genuine Ford Mustang parts. We keep a wide inventory of OEM Mustang parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

Knock Sensor helps in effective performance of Ford Mustang automobiles because it is responsible for measuring the knock, which is a result of wrong timing of ignition. This device communicates with the powertrain control module (PCM) and allows it to change the ignition timing in order reduce high detonation. Usually, the Ford Mustang Knock Sensors use piezoelectric technology to convert the physical vibration into the electrical signals to check constant pressure spike, which signifies knocking. Through the years Ford Mustang has used different designs of Knock Sensors, which are mainly directed to improving the ability and effectiveness of the engine. Contemporary systems are able to act upon ignition timing for each cylinder and can also control boost pressure in some specific cases. It also allows the Ford Mustang to run smoothly at different conditions while at the same time protecting the engine from damage and offering a chance for using fuel with a lower octane number.

Ford Mustang Knock Sensor Parts and Q&A

Knock Sensor
4L3Z-12A699-AA
Q: How to service the Knock Sensor (KS) on the 4.0L SOHC engine on Ford Mustang?
A:
The service of the Knock Sensor (KS) on the 4.0L SOHC engine requires removing the Intake Manifold as the first step. The Knock Sensor electrical connector needs to be separated before continuing. Uninstall the Knock Sensor by dislodging its securing bolt from the sensor itself. The Knock Sensor installation requires torqueing it up to 20 Nm (177 lb-in) followed by performing the reversal of the removal process for completion of the installation.