Crankshaft Position Sensor (CKP) > MAZDA 3 / 5 / 6 & CX-7 & MX-5 2.0L / 2.3L / 2.5L MZR / L-Series GASOLINE ENGINE > L3G2-18-221 | GENUINE PART (Mazda Original Equipment)
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Genuine OEM Engine Component (Mazda Original Equipment).
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Part Number: L3G2-18-221 (Official Mazda OE Number).
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Interchangeable OE: Also widely cross-referenced with L3K9-18-221A and Ford OE number 6M8G-6C315 series.
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Component Name: Crankshaft Position Sensor (CKP Sensor).
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Primary Applications (Engine Specific): This sensor is highly common across many Mazda models that use the 2.0L, 2.3L, and 2.5L MZR / L-Series (LF/L3/L5) Gasoline engines:
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Mazda 3 (BK/BL): Fits 2.0L and 2.3L (including Mazdaspeed/MPS) models (approx. 2006–2013). Confirms your Mazda 3 2006–2009.
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Mazda 5 (CR/CW): Fits 2.3L and 2.5L models (approx. 2008–2015). Confirms your Mazda 5.
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Mazda 6 (GG/GH): Fits 2.3L and 2.5L models (approx. 2006–2013). Confirms your Mazda 6 2003–2013 (Please double-check 2003–2005 models, as the part is most consistently listed from 2006).
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Mazda 8 (MPV): Fits the 2.3L models (similar to part FSD7-18-221B, but L3G2-18-221 is a common cross-reference/replacement). Confirms your Mazda 8.
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Mazda CX-7: Fits 2.5L (Non-Turbo) and some 2.3L Turbo variants.
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Key Function: Provides the Engine Control Module (ECM) with the primary timing reference for the engine, controlling ignition timing and fuel injection.
This is a Genuine OEM Crankshaft Position Sensor (CKP Sensor), identified by the Mazda part number L3G2-18-221. This sensor is a factory-original component designed for the family of robust and shared 2.0L, 2.3L, and 2.5L MZR / L-Series Gasoline engines that powered a large portion of Mazda's popular models during the 2000s and early 2010s.
The CKP sensor is vital for precise engine operation:
Timing Signal: It reads the rotation of the crankshaft's reluctor wheel, delivering the fundamental data (engine speed and piston position) to the ECM to ensure accurate firing of the spark plugs and injection of fuel.
Engine Families: This part's broad application highlights the extensive shared engineering between the 2.0L, 2.3L (including MPS/Mazdaspeed), and 2.5L naturally aspirated engines, as well as their commonality with certain Ford Duratec and EcoBoost components.
Note on SkyActiv: It is important to note that this sensor is generally not compatible with the later SkyActiv-G engines (post-2012/2013, depending on the model), which use a different sensor design.
Fitment Assurance: The part number L3G2-18-221 is consistently verified as the correct genuine CKP sensor for the 2.0L, 2.3L, and 2.5L MZR Gasoline engine variants of the models you listed.
Compatible Vehicle (Primary Applications - Check VIN for confirmation of 2.0L / 2.3L / 2.5L MZR Engine):
Mazda 3 (BK/BL) 2.0L / 2.3L / 2.5L (2006–2013)
Mazda 5 (CR/CW) 2.3L / 2.5L (2008–2015)
Mazda 6 (GG/GH) 2.3L / 2.5L (2006–2013)
Mazda 8 / MPV 2.3L
Mazda CX-7 2.5L (Non-Turbo) / 2.3L Turbo
Part Number:
✔ L3G2-18-221 (Crankshaft Position Sensor - Genuine Mazda OE)
Other OE Ref: L3K9-18-221A
Part Type:
✔ Crankshaft Position Sensor (CKP) (Genuine Part, 2.0L / 2.3L / 2.5L MZR Gasoline Specific)
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