Crankshaft Position Sensor (CKP) > MAZDA 6 (GG/GY/GH) & MAZDA 3 (BK) 1.8L / 2.0L / 2.3L MZR / L-Series GASOLINE ENGINE > L813-18-221A | GENUINE PART (Mazda Original Equipment)
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Genuine OEM Engine Component (Mazda Original Equipment).
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Part Number: L813-18-221A (Official Mazda OE Number).
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Supersedes/Interchangeable OE: This part is an update to L813-18-221.
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Cross-Reference: This part number is highly specific to the early 1.8L and 2.0L MZR engines.
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Component Name: Crankshaft Position Sensor (CKP Sensor).
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Primary Applications (Engine Specific): This sensor is crucial for earlier Mazda models equipped with the 1.8L, 2.0L, and 2.3L MZR / L-Series (L8/LF/L3) Gasoline engines:
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Mazda 6 (First Generation, GG/GY Chassis): Fits 1.8L, 2.0L, and 2.3L models (approx. 2002–2007). This confirms your Mazda 6 2003–2007.
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Mazda 3 (First Generation, BK Chassis): Fits 1.6L, 2.0L and 2.3L models (approx. 2003–2009).
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Mazda 5 (First Generation, CR Chassis): Fits 1.8L and 2.0L models (approx. 2005–2010).
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Key Function: Provides the Engine Control Module (ECM) with the primary timing reference for the engine, controlling ignition timing and sequential fuel injection.
This is a Genuine OEM Crankshaft Position Sensor (CKP Sensor), identified by the Mazda part number L813-18-221A. This sensor is a factory-original component specifically designed for the earlier versions of the MZR / L-Series Gasoline engines that powered the popular first-generation Mazda 6 (GG/GY) and the first-generation Mazda 3 (BK).
The CKP sensor is vital for the reliable operation of the engine:
Timing Signal: The sensor reads the position of the crankshaft's reluctor wheel, supplying the ECM with the fundamental data for engine speed and piston position. This data is the basis for all ignition and fuel injection calculations.
Part Distinction: While many later Mazda 6 models (post-2006) use the L3G2-18-221 sensor, the L813-18-221A part number is specifically associated with the earlier model years and smaller 1.8L/2.0L MZR engines of the GG/GY chassis, making it the correct Genuine OE choice for your Mazda 6 2003–2007.
Fitment Assurance: The part number L813-18-221A is consistently verified as the correct genuine CKP sensor for the 1.8L / 2.0L / 2.3L MZR Gasoline engine variants of the Mazda 6 2003–2007.
Compatible Vehicle (Primary Applications - Check VIN for confirmation of 1.8L / 2.0L / 2.3L MZR Engine):
Mazda 6 (GG/GY) 1.8L / 2.0L / 2.3L (2002–2007)
Mazda 3 (BK) 1.6L / 2.0L / 2.3L (2003–2009)
Mazda 5 (CR) 1.8L / 2.0L (2005–2010)
Part Number:
✔ L813-18-221A (Crankshaft Position Sensor - Genuine Mazda OE)
Supersedes: L813-18-221
Part Type:
✔ Crankshaft Position Sensor (CKP) (Genuine Part, 1.8L / 2.0L / 2.3L MZR Gasoline Specific)
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