Ignition Knock (Detonation) Sensor

Part Number 242-91027 (117547648)

UPC: 724620130632

Package contents: 1 Each per Box

Select vehicle for guaranteed fit

Color

$35.79

In stockShips by 6th Nov

Description

Walker Products Ignition Knock (Detonation) Sensors are OE Replacement components that monitor engine vibrations to detect knocking or detonation events. These sensors are a critical part of the engine control system, allowing the ECU to adjust ignition timing in real time to prevent spark knock—a condition that can cause internal engine damage, reduced fuel economy, and drivability issues. Walker Knock Sensors are engineered to match OE specifications for frequency range, sensitivity, and electrical output. Each unit is tuned to detect the specific resonant frequency of knock in a given engine platform, enabling precise spark retard when knock is detected. Built from high-quality, heat- and oil-resistant materials, these sensors are designed to endure the harsh conditions of the engine block and cylinder head. With exact OE fitment, Walker Knock Sensors install directly into the original threaded locations and connect using factory-style electrical terminals. Whether addressing a fault code (e.g., P0325, P0330), correcting timing issues, or replacing a failed sensor, Walker Knock Sensors restore proper knock detection, improve engine safety, and support optimal ignition performance across a wide range of gasoline applications.

Fitment

This part fits the following vehicles.

BMW

2017-2020 230i
2017-2020 230i xDrive
2016-2018 330e
2017-2019 330i
2017-2019 330i GT xDrive
2017-2019 330i xDrive
2016-2018 340i
2017-2019 340i GT xDrive
2016-2018 340i xDrive
2017-2020 430i
2017-2020 430i Gran Coupe
2017-2020 430i xDrive
2017-2020 430i xDrive Gran Coupe
2017-2020 440i
2017-2020 440i Gran Coupe
2017-2020 440i xDrive
2017-2020 440i xDrive Gran Coupe
2018-2020 530e
2018-2020 530e xDrive
2017-2020 530i
2017-2020 530i xDrive
2017-2020 540i
2017-2020 540i xDrive
2018-2019 640i xDrive Gran Turismo
2017-2019 740e xDrive
2016-2020 740i
2017-2020 740i xDrive
2020 745e xDrive
2020 840i
2020 840i Gran Coupe
2020 840i xDrive
2020 840i xDrive Gran Coupe
2014-2017, 2019-2020 i8
2017-2020 M240i
2017-2020 M240i xDrive
2020 M340i
2020 M340i xDrive
2017-2019 M760i xDrive
2016-2020 X1
2018-2020 X2
2018-2020 X3
2019-2020 X4
2019-2020 X5
2020 X6
2019-2020 X7
2019-2020 Z4

Kia

1996 Sportage

Mini

2014-2020 Cooper
2016-2020 Cooper Clubman
2017-2020 Cooper Countryman

Porsche

1995 968

Saab

1995 900

Features & benefits

Detects Engine Knock: Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
OE Replacement Sensitivity: Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
Built for Harsh Environments: Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
Restores Ignition Timing Accuracy: Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
Direct replacement - this ignition knock sensor is made to match the fit, function and performance of the original equipment on specified vehicles
Ideal solution - engineered to detect vibrations from knock and other combustion problems and replace a knock sensor that has failed
Durable construction - designed and manufactured to strict specifications for reliable performance
Trustworthy quality - backed by a team of product experts in the United States and more than a century of automotive experience

Specifications

Connector Gender	Female
Connector Quantity	1
Connector Shape	Rectangle
Country Of Origin	CN
Length	44.1000
Mounting Hardware Included	No
Street Legal	Yes
Terminal Gender	Male
Terminal Quantity	2
Terminal Type	Blade
Wiring Harness Included	No