How to service the knock sensor (KS) on Mercury Mariner?

You must have the vehicle in neutral position while using a hoist during the knock sensor (KS) servicing operation. Before working start disconnect the battery ground cable and proceed to remove the intake manifold. First disconnect the knock sensor bolt before removing both the bolt and the sensor. Installation requires following the backward steps of removal while torquing the bolt to 20 Nm (15 lb-ft).

How to service the knock sensor (KS) on Mercury Mountaineer?

The knock sensor (KS) servicing needs to start with removing the intake manifold according to the illustration before dismantling the other components. Perform device installation by following the reverse steps of removal.

OEM Mercury Knock Sensor

Engine Knock Sensor

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19 Knock Sensors found

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Mercury Knock Sensor Part Number: XL3Z-12A699-AA
$36.93 MSRP: $57.64
You Save: $20.71 (36%)
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Grand Marquis | 2003-2011 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
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Mercury 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
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
- Sable | 2002-2005 | GS, LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Knock Sensor Part Number: 1S7Z-12A699-BB
$39.67 MSRP: $64.00
You Save: $24.33 (39%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor; Sensor
- Replaces: 1S7Z-12A699-BA
Fits the following Mercury Models:
- Mariner | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
- Milan | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Knock Sensor Part Number: 4L3Z-12A699-AA
$55.59 MSRP: $88.27
You Save: $32.68 (38%)
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Mariner | 2009-2011 | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Milan | 2010 | Premier | 6 Cyl 3.0 L FLEX
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Mercury Knock Sensor Part Number: 1L2Z-12A699-AA
$96.98 MSRP: $154.00
You Save: $57.02 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
- Manufacturer Note: Dual headed Bolt on type sensor
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Knock Sensor Part Number: 7T4Z-12A699-A
$53.59 MSRP: $88.18
You Save: $34.59 (40%)
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
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Knock Sensor Part Number: XF5Z-12A699-AA
$158.59 MSRP: $215.81
You Save: $57.22 (27%)
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS
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Mercury Knock Sensor Part Number: XL3Z-12A699-BA
$45.32 MSRP: $70.73
You Save: $25.41 (36%)
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Mountaineer | 2001-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Knock Sensor Part Number: AU5Z-12A699-A
$13.75 MSRP: $21.27
You Save: $7.52 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Milan | 2011 | Premier | 6 Cyl 3.0 L FLEX
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Mercury Knock Sensor Part Number: XS8Z-12A699-AA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Cougar | 1999-2000 | V6 | 6 Cyl 2.5 L GAS
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Mercury Knock Sensor Part Number: F77Z-12A699-BA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Mountaineer | 1998 | Base | 6 Cyl 4.0 L GAS
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Mercury Knock Sensor Part Number: YL8Z-12A699-AA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Mariner | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Knock Sensor Part Number: YF1Z-12A699-AA
Product Specifications
- Other Name: Sensor - Engine Knock
Fits the following Mercury Models:
- Sable | 2000-2002 | LS, LS Premium | 6 Cyl 3.0 L GAS
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Mercury Knock Sensor Part Number: F6RZ-12A699-DA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base | 4 Cyl 2.0 L GAS
- Mystique | 1996-1999 | GS, LS | 4 Cyl 2.0 L GAS
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Mercury Knock Sensor Part Number: F6RZ12A699AA
Product Specifications
- Other Name: Sensor - Engine Knock
Fits the following Mercury Models:
- Cougar | 1999 | V6 | 6 Cyl 2.5 L GAS
- Mystique | 1995-1999 | Base, GS, GS Spree, LS, LS Young America | 6 Cyl 2.5 L GAS
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Mercury Knock Sensor Part Number: F3XY-12A699-A
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Villager | 1993-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS
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Mercury Knock Sensor Part Number: 3M8Z-12A699-AA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Milan | 2006-2009 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Knock Sensor Part Number: 1S8Z-12A699-AA
Product Specifications
- Other Name: Sensor - Engine Knock
Fits the following Mercury Models:
- Cougar | 2001-2002 | Base, S, V6 | 6 Cyl 2.5 L GAS
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Mercury Knock Sensor Part Number: XS2Z-12A699-BA
Product Specifications
- Other Name: Sensor - Engine Knock; Ignition Knock (Detonation) Sensor
Fits the following Mercury Models:
- Mariner | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
- Mystique | 1999-2000 | GS | 4 Cyl 2.0 L GAS

Mercury Knock Sensor

If you own Mercury and want to keep it in top shape, choosing OEM Knock Sensor is a smart move. They are precisely engineered and follow strict factory standards. They are made in advanced facilities that use cutting edge technology. Each part goes through thorough testing to confirm strength and safety, so you can trust it. FordPartsDeal.com gives you genuine Mercury Knock Sensor at some of the affordable online prices without cutting quality. Every OEM Mercury part includes the manufacturer's warranty, easy returns, and super-fast delivery. So why wait? Shop now and get your vehicle back to peak condition.

Mercury Knock Sensor is applied to detect any harmful engine knock and instruct the computer to retard timing. In 1939, Mercury began to roll out on the roads under the name of the Roman messenger, with a promise of more stylishness. The brand combined smoother rides with spacious cabins, allowing the family to cruise without experiencing every pothole. The Mercury interiors dampened wind and tire noises, and balanced suspensions made steering light but steady. The combination of panache and worth that drivers preferred was present in the first sedans and later in other sedans such as Cougar and Grand Marquis. Mercury continued to add comfort over the decades, which testifies that it is possible to make mid-sized cars luxurious without taking a toll on wallets. The marque only targeted that sweet ride sticker price balance even before production ceased in 2011. Knock Sensor has a hardened piezoelectric core which converts the spikes of pressure into immediate voltage for the powertrain control module. That Knock Sensor signal allows the computer to boost ignition timing before ping has time to develop to piston destruction. The Knock Sensor utilizes real-time information as it operates its engine a cylinder at a time to allow the module to adjust spark angles, safeguard parts, and generate plausible power on low-octane fuel even at full load. The Knock Sensor responds in milliseconds, drivers experience softer pulls and eliminate the rattle that makes it look like they use fuel in vain. All modern Mercury gain, be it in city traffic or in the running of its legs on a highway.

Mercury Knock Sensor Parts and Q&A

Knock Sensor
1S7Z-12A699-BB
Q: How to service the knock sensor (KS) on Mercury Mariner?
A:
You must have the vehicle in neutral position while using a hoist during the knock sensor (KS) servicing operation. Before working start disconnect the battery ground cable and proceed to remove the intake manifold. First disconnect the knock sensor bolt before removing both the bolt and the sensor. Installation requires following the backward steps of removal while torquing the bolt to 20 Nm (15 lb-ft).
Knock Sensor
1L2Z-12A699-AA
Q: How to service the knock sensor (KS) on Mercury Mountaineer?
A:
The knock sensor (KS) servicing needs to start with removing the intake manifold according to the illustration before dismantling the other components. Perform device installation by following the reverse steps of removal.