How to service the Knock Sensor (KS) on 2009 Ford Flex?

To maintain the Knock Sensor (KS) the thermostat housing, lower intake manifold and coolant tube need to be removed. Open the connector of the KS and take off the bolts. Install the new KS, screwing the bolts to 20 Nm and greasing the O-ring with coolant. Proper type of Motorcraft coolant depends on the date of construction of the vehicle.

OEM 2009 Ford Flex Knock Sensor

Engine Knock Sensor

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2009 Ford Flex Knock Sensor Part Number: 7T4Z-12A699-A
$55.53 MSRP: $88.18
You Save: $32.65 (38%)
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Replaces: 7T4Z-12A699-AB
- Item Weight: 0.30 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 7T4Z-12A699-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
More Info
Fits the following 2009 Ford Flex Submodels:
- Limited, SE, SEL, Titanium | 6 Cyl 3.5 L GAS

2009 Ford Flex Knock Sensor

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2009 Ford Flex Knock Sensor Parts Q&A

Q: How to service the Knock Sensor (KS) on 2009 Ford Flex?
A: To maintain the Knock Sensor (KS) the thermostat housing, lower intake manifold and coolant tube need to be removed. Open the connector of the KS and take off the bolts. Install the new KS, screwing the bolts to 20 Nm and greasing the O-ring with coolant. Proper type of Motorcraft coolant depends on the date of construction of the vehicle.