Motorad 1KS1081 Ignition Knock (Detonation) Sensor
OE Quality 60-Day Returns
Motorad

Motorad 1KS1081 Ignition Knock (Detonation) Sensor

Brand Motorad 1KS1081
Length 18.5
Length 469.90
Terminal Type Blade
Mounting Hardware Included No
Connector Shape Oblong
Connector Shape Oblongo
Connector Shape Oval
Connector Shape Óvalo
Terminal Quantity 2
Connector Gender Female
Terminal Gender Male
Wiring Harness Included No
Mounting Type Atornillado
Mounting Type Bolt-on
Fits Hyundai and Kia · 90 vehicles

OE-spec design. Meets and exceeds OEM specifications for a dependable replacement.

Precision piezoceramic elements. Built to tight tolerances for durability and accurate signal response.

Bolt-on installation. Female oval connector with blade terminals for a straightforward fit.

Cross-references HOLSTEIN 2KNC0104, HOLSTEIN 2KNC0290 and Motorad 1KS1081 for the same application. See all 16.

$61.36Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $61.36
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Ignition Knock (Detonation) Sensor options

Ignition Knock Sensor for Hyundai and Kia

The Motorad 1KS1081 ignition knock sensor is built for precise engine knock detection and accurate signal delivery to the ECM. It is a bolt-on, female-connector sensor with a blade terminal design, made to meet OE-level fitment and performance expectations for Hyundai and Kia applications.

  • Part number: 1KS1081
  • Ignition knock (detonation) sensor for engine timing control
  • Uses a high-quality piezoceramic sensing element for accurate knock response
  • Oblong/oval connector shape with 2 terminals
  • Female connector, male blade terminals
  • Bolt-on mounting style
  • No mounting hardware included
  • No wiring harness included

How It Works

Motorad 1KS1081 monitors a wide range of engine knock frequencies and sends that information to the ECM so ignition timing can be adjusted correctly. This helps the engine management system react to detonation events with the precision needed for smoother operation and proper combustion control. It is a direct-fit style replacement for many Hyundai Sonata, Tucson, Santa Fe, Santa Fe Sport, and Kia Optima, Sorento, Sportage, Forte, Forte Koup, Magentis, and Rondo applications. This part cross-references Standard Ignition KS383 for the same application.

Common Symptoms This Sensor May Address

  • Check engine light related to knock sensor faults
  • Audible spark knock or detonation under load
  • Reduced ignition timing response from the ECM
  • Rough running caused by inaccurate knock feedback
  • Driveability issues tied to failed engine knock detection

Installation Notes

Fits 2007-2019 Hyundai Sonata, N/A; Fits 2010-2015 Hyundai Tucson, N/A; Fits 2010-2012 Hyundai Santa Fe, N/A; Fits 2013-2018 Hyundai Santa Fe Sport, N/A; Fits 2018-2021 Hyundai Tucson, N/A; Fits 2019-2020 Hyundai Santa Fe, N/A; Fits 2009-2020 Kia Optima, N/A; Fits 2011-2020 Kia Sorento, N/A; Fits 2011-2022 Kia Sportage, N/A; Fits 2010-2013 Kia Forte, N/A; Fits 2010-2013 Kia Forte Koup, N/A; Fits 2010 Kia Forte, N/A, with California Emissions System; Fits 2010 Kia Forte Koup, N/A, with California Emissions System; Fits 2010 Kia Magentis, N/A; Fits 2009-2010 Kia Rondo, N/A. Verify connector shape, terminal count, and mounting style before installation. Clean the mounting surface and inspect the harness connector for corrosion or damage before connecting the sensor.

Quality Assurance

Motorad designs this knock sensor to meet and exceed OEM specifications, using tight-tolerance piezoceramic elements for durability and consistent signal accuracy. The 1KS1081 is engineered for dependable engine knock detection in Hyundai and Kia platforms.

Related reading

This part fits 90 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersFuel TypeNotes
2022KiaSportage—2.4LL4——
2021HyundaiTucson—2.4LL4——
2021KiaSportage—2.4LL4——
2020HyundaiSanta Fe—2.4LL4——
2020HyundaiTucson—2.4LL4——
2020KiaOptima—2.4LL4——
2020KiaSorento—2.4LL4——
2020KiaSportage—2.4LL4——
2019HyundaiSanta Fe—2.4LL4——
2019HyundaiSonata—2.4LL4——
2019HyundaiTucson—2.4LL4——
2019KiaOptima—2.4LL4——
2019KiaSorento—2.4LL4——
2019KiaSportage—2.4LL4——
2018HyundaiSanta Fe Sport—2.4LL4——
2018HyundaiSonata—2.4LL4——
2018HyundaiTucson—2.4LL4——
2018KiaOptima—2.4LL4——
2018KiaSorento—2.4LL4——
2018KiaSportage—2.4LL4——
2017HyundaiSanta Fe Sport—2.4LL4——
2017HyundaiSonata—2.4LL4——
2017KiaOptima—2.4LL4——
2017KiaSorento—2.4LL4——
2017KiaSportage—2.4LL4——
2016HyundaiSanta Fe Sport—2.4LL4——
2016HyundaiSonata—2.4LL4——
2016KiaOptima—2.4LL4GAS—
2016KiaSorento—2.4LL4——
2016KiaSportage—2.4LL4——
2015HyundaiSanta Fe Sport—2.4LL4——
2015HyundaiSonata—2.4LL4GAS—
2015HyundaiTucson—2.4LL4——
2015KiaOptima—2.4LL4GAS—
2015KiaSorento—2.4LL4——
2015KiaSportage—2.4LL4——
2014HyundaiSanta Fe Sport—2.4LL4——
2014HyundaiSonata—2.4LL4GAS—
2014HyundaiTucson—2.4LL4——
2014KiaOptima—2.4LL4GAS—
2014KiaSorento—2.4LL4——
2014KiaSportage—2.4LL4——
2013HyundaiSanta Fe Sport—2.4LL4——
2013HyundaiSonata—2.4LL4GAS—
2013HyundaiTucson—2.4LL4——
2013HyundaiTucson—2.0LL4——
2013KiaForte—2.4LL4——
2013KiaForte—2.0LL4——
2013KiaForte Koup—2.4LL4——
2013KiaForte Koup—2.0LL4——
2013KiaOptima—2.4LL4GAS—
2013KiaSorento—2.4LL4——
2013KiaSportage—2.4LL4——
2012HyundaiSanta Fe—2.4LL4——
2012HyundaiSonata—2.4LL4GAS—
2012HyundaiTucson—2.4LL4——
2012HyundaiTucson—2.0LL4——
2012KiaForte—2.4LL4——
2012KiaForte—2.0LL4——
2012KiaForte Koup—2.4LL4——
2012KiaForte Koup—2.0LL4——
2012KiaOptima—2.4LL4GAS—
2012KiaSorento—2.4LL4——
2012KiaSportage—2.4LL4——
2011HyundaiSanta Fe—2.4LL4——
2011HyundaiSonata—2.4LL4GAS—
2011HyundaiTucson—2.4LL4——
2011HyundaiTucson—2.0LL4——
2011KiaForte—2.4LL4——
2011KiaForte—2.0LL4——
2011KiaForte Koup—2.4LL4——
2011KiaForte Koup—2.0LL4——
2011KiaOptima—2.4LL4GAS—
2011KiaSorento—2.4LL4——
2011KiaSportage—2.4LL4——
2010HyundaiSanta Fe—2.4LL4——
2010HyundaiSonata—2.4LL4——
2010HyundaiTucson—2.4LL4——
2010KiaForte—2.4LL4——
2010KiaForteAutomatic2.0LL4—with California Emissions System
2010KiaForte Koup—2.4LL4——
2010KiaForte KoupAutomatic2.0LL4—with California Emissions System
2010KiaMagentis—2.4LL4——
2010KiaOptima—2.4LL4——
2010KiaRondo—2.4LL4——
2009HyundaiSonata—2.4LL4——
2009KiaOptima—2.4LL4——
2009KiaRondo—2.4LL4——
2008HyundaiSonata—2.4LL4——
2007HyundaiSonata—2.4LL4——
Directly replaces or cross-references 16 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
HOLSTEIN — 2KNC0104HOLSTEIN — 2KNC0290Motorad — 1KS1081NTK — ID0033Standard Ignition — KS3835S124852502G0002502G200171520392502G000392502G100392502G200716959DKS823S8983SU13900