RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044
RIDEX Knock Sensor • 3921K0044

RIDEX Knock Sensor • 3921K0044

Ridex SKU: 3921K0044

£9.95 GBP

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RIDEX 3921K0044 Knock Sensor — engineered by RIDEX to detect engine knock/ping precisely and help the ECU optimize ignition timing. Stable output signal and robust housing for long‑term reliability across multiple platform families.

  • Type: Knock sensor (detonation sensor), with cable
  • Connector(s): 2‑pin (harness‑specific)
  • Cable length: —
  • EAN: —
  • Approx. weight: —
  • Brand: RIDEX
  • Part No.: 3921K0044

*Always confirm by VIN and OE number. Sensor connector and harness lengths can vary by engine/trim.

Why RIDEX? OE‑matching signal quality and durability at straightforward pricing — a dependable replacement for misfire/knock‑related fault codes.

What’s in the box: Knock sensor with harness (as supplied by RIDEX).

Installation notes: Fit on clean, flat boss; torque to spec to ensure correct sensitivity. Clear codes and perform road‑test. Verify fitment by VIN/OE before purchase.

MakeModelChassis / BodyYearsPower (PS)Engine CodesFuel / Notes
FORDC‑MaxDM202.2007–09.2010122–145Duratec HE 1.8/2.0; 2.0 EcoBoost (sel.)Petrol / E85 / CNG / LPG
FORDFiesta Mk5 HatchbackJH1/JD1/JH3/JD303.2005–06.2008150Duratec ST 2.0Petrol
FORDFocus C‑MaxDM210.2003–03.2007120–145Duratec HE 1.8/2.0Petrol / E85
FORDFocus Mk1 EstateDNW08.2002–11.20041732.0 RS TurboPetrol
FORDFocus Mk1 HatchbackDAW/DBW03.2002–11.20041732.0 RS TurboPetrol
FORDFocus Mk2 Box / Estate—06.2009–07.2011125Duratec HE 1.8/2.0E85
FORDFocus Mk2 ConvertibleDB310.2006–09.2010145Duratec HE 2.0Petrol
FORDFocus Mk2 EstateDA_/FFS/DS07.2004–09.2012125–145Duratec HE 1.8/2.0Petrol / E85 / LPG
FORDFocus Mk2 HatchbackDA_/HCP/DP07.2004–09.2012125–145Duratec HE 1.8/2.0; 2.0 alt‑fuelPetrol / E85 / CNG / LPG
FORDFocus Mk2 SaloonDB_/FCH/DH04.2005–09.2012125–145Duratec HE 1.8/2.0Petrol / E85
FORDFocus Mk3 EstateDYB07.2010–02.2020150–2501.6/2.0 EcoBoost (GTDi)Petrol
FORDFocus Mk3 HatchbackDYB08.2011–02.2020150–3501.6/2.0 EcoBoost (ST/RS)Petrol
FORDFocus Mk3 SaloonDYB10.2013–02.20201501.6/2.0 EcoBoostPetrol
FORDGalaxy Mk2 MPVWA605.2006–06.2015130–2032.0 EcoBoost; Duratec HEPetrol / E85 (+diesel range)
FORDGalaxy Mk3 MPVCK01.2015–…2402.0 EcoBoostPetrol
FORDKuga Mk2DM208.2017–06.20182422.0 EcoBoostPetrol
FORDMondeo Mk3 EstateBWY10.2000–03.2007110–146Duratec HE 1.8/2.0Petrol
FORDMondeo Mk3 HatchbackB5Y10.2000–03.2007110–146Duratec HE 1.8/2.0Petrol
FORDMondeo Mk3 SaloonB4Y10.2000–03.2007110–146Duratec HE 1.8/2.0Petrol
FORDMondeo Mk4 EstateBA703.2007–01.2015145–2402.0/2.3 Duratec; 2.0 EcoBoostPetrol / E85 / LPG
FORDMondeo Mk4 HatchbackBA703.2007–01.2015145–2402.0/2.3 Duratec; 2.0 EcoBoostPetrol / E85 / LPG
FORDMondeo Mk4 SaloonBA703.2007–01.2015145–2402.0/2.3 Duratec; 2.0 EcoBoostPetrol / E85 / LPG
FORDMondeo Mk5 EstateCF09.2014–…203–2402.0 EcoBoostPetrol
FORDMondeo Mk5 HatchbackCE09.2014–…203–2402.0 EcoBoostPetrol
FORDMondeo Mk5 SaloonCD05.2015–…149–2401.5/2.0 EcoBoostPetrol
FORDS‑Max Mk1WA605.2006–12.2014145–2402.0/2.3 Duratec; 2.0 EcoBoostPetrol / E85
FORDS‑Max Mk2CJ01.2015–…2402.0 EcoBoostPetrol
FORDTransit Mk5 MinibusV184/V18503.2004–05.2006137—Diesel
FORDTransit Mk5 Platform / ChassisV184/V18503.2004–05.2006137—Diesel
FORDTransit Mk5 VanV184/V18503.2004–05.2006137—Diesel
FORDTransit Mk6 ChassisV347/V34804.2006–08.2014136–1452.3 Duratec; 2.0 EcoFuelPetrol / CNG / LPG
FORDTransit Mk6 VanV347/V34804.2006–08.2014136–1452.3 Duratec; 2.0 EcoFuelPetrol / CNG / LPG
JAGUAR(models with 2.0 GTDi)—03.2015–…200–241AJ200 / 2.0 GTDiPetrol
JAGUARXF SaloonX25006.2012–04.2015241AJ200 2.0 GTDiPetrol
JAGUARXF SaloonX26005.2015–…241AJ200 2.0 GTDi (Ingenium)Petrol
JAGUARXJ SaloonX35105.2012–12.2019241AJ200 2.0 Ti4Petrol
LAND ROVERDiscovery SportL55011.2014–…240–2412.0 Si4 (GTDi)Petrol
LAND ROVERFreelander 2L35910.2011–10.20142412.0 Si4 (GTDi)Petrol
LAND ROVERRange Rover EvoqueL53806.2011–12.2019240–2412.0 Si4 (GTDi)Petrol
LAND ROVERRange Rover Evoque ConvertibleL53811.2015–12.20192412.0 Si4 (GTDi)Petrol
MAZDA3 HatchbackBK10.2003–12.2009141–150Z6, L8‑DE, LF‑DE/VE, L3‑VEPetrol
MAZDA3 HatchbackBL12.2008–09.2014147–166Z6, L8‑DE, LF‑VE, L3‑VEPetrol
MAZDA3 SaloonBK10.2003–12.2009141–150Z6, L8‑DE, LF‑DE/VE, L3‑VEPetrol
MAZDA3 SaloonBL02.2009–09.2014147–151Z6, L8‑DE, LF‑VE, L3‑VEPetrol
MAZDA5CR1902.2005–05.2010110–146L8‑DE, LF‑DE/VE, L3‑VE (market‑dep.)Diesel, Petrol
MAZDA5CW06.2010–…116–144L8‑DE, LF‑VEPetrol
MAZDA6 EstateGH12.2007–07.2013120–170LF‑VE, L3‑VEPetrol
MAZDA6 EstateGY01.2002–02.2008120–166L8‑DE, LF‑DE, L3‑VEPetrol
MAZDA6 HatchbackGG08.2002–08.2007120–166L8‑DE, LF‑DE, L3‑VEPetrol
MAZDA6 HatchbackGH08.2007–07.2013120–170LF‑VE, L3‑VEPetrol
MAZDA6 SaloonGG06.2002–08.2007120–260L8‑DE, LF‑DE, L3‑VE (incl. MPS 2.3 DISI)Petrol
MAZDA6 SaloonGH08.2007–07.2013120–170LF‑VE, L3‑VEPetrol
MAZDACX‑7ER07.2009–03.2013163L5‑VE 2.5 (EU)Petrol
MAZDAMPV IILW07.2002–02.2006141L3‑DE 2.3Petrol
MAZDAMX‑5 IIINC03.2005–12.2014126–169Z6 1.8; LF‑VE 2.0Petrol; manual
MAZDATribute EstateEP12.2003–05.2008150L3‑DE 2.3Petrol
VOLVOC3053310.2006–12.2012125–146B4204S/B4204TPetrol / E85
VOLVOS40 IIMS/54404.2004–12.2012125–146B4184S11/B4204S/B4204TPetrol / E85
VOLVOS60 IIY20/13404.2010–12.2015203–245B4204T (Drive‑E/GTDi)Petrol
VOLVOS80 IIAS/12401.2008–12.2016146–241B4204S/B4204TPetrol / E85
VOLVOV50MW/54504.2004–12.2012125–146B4184S11/B4204S/B4204TPetrol / E85 / LPG
VOLVOV60 I155/15707.2010–12.2014203–241B4204TPetrol
VOLVOV70 IIIBW/13510.2007–12.2014145–241B4204S/B4204TPetrol / E85
VOLVOXC60 I15612.2009–02.2017203–241B4204TPetrol

Fitment compiled from the user's list. Engine codes are best‑effort families; confirm by VIN/OE and regional spec.