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What This Kit Covers

The Koeep 1800442 / 1800441 kit is a matched pair: the 1800442 unit reads the camshaft, the 1800441 unit reads the crankshaft. It is precision-engineered for the 2026 Mazda MX-5 Miata ND3 with the Skyactiv-G 2.0L inline-4 engine.

The same pair stays backward-compatible with the Mazda 323 (BJ), Demio (DY), and earlier MX-5 NA, NB, and NC platforms. You can order the 2Pcs Camshaft & Crankshaft Position Sensor for the Mazda Miata MX-5 (1800442 / 1800441) straight from the Koeep product page.

Factory calibration holds ±0.5° of crankshaft angular resolution across the full 7,200 RPM range, which drives precise ignition timing and variable valve timing (VVT) actuation. The high-temp composite housing resists thermal degradation up to 180°C (356°F), the rating is 100,000+ miles across a 2026–2030 duty cycle, and the OE-identical gold-plated connector (SAE/USCAR-2) makes the install plug and play.

2026 Standards It Meets

• Diagnostics: ISO 27145 (WWH-OBD), the global diagnostic standard mandated for 2026–2030 model-year vehicles.
• Network: SENT-protocol digital output reaches the PCM with zero signal loss over CAN-bus 3.0 (ISO 11898-1:2024).
• Security: ISO/SAE 21434 cybersecurity requirements for ECU-integrated sensor networks.
• Sensing: Hall-effect magnetoresistive technology compliant with the SAE J2716 SENT digital protocol.

How the Sensors Work

Hall element and trigger decoding

Each sensor runs an InSb (indium antimonide) Hall-effect IC from the 2026 Infineon TLE496x series. Sensitivity is 3.5 mV/Gauss and response latency stays under 10 µs. That speed lets the PCM run per-cylinder ignition trim and VVT phasing at the granularity that 2026 CARB LEV IV and Euro 7 emissions rules demand.

The crank sensor decodes the 58X trigger wheel with misfire detection resolution down to 0.5%. The 2026 OBD-II mandate under ISO 27145-4 WWH-OBD monitoring sets the threshold at 1.0%, so this pair clears the requirement with room to spare.

SENT-B output and housing

Signal output runs over SAE J2716 SENT-B (Single Edge Nibble Transmission, Revision B). This revision doubles the data throughput of legacy SENT while keeping backward pin compatibility, so the pair also works with previous-generation ECUs in the NB/NC Miata, 323, and Demio platforms.

The housing is glass-fiber-reinforced PPS (polyphenylene sulfide), the same thermoplastic specified in 2026 OEM sensor bodies, dimensionally stable across -40°C to +180°C thermal cycles. The ND3 follows Mazda's Gram Strategy, which favors low mass, so the light but stable housing suits the platform. Koeep validated the combination through multi-vehicle qualification testing.

Specification Matrix

Every value below comes straight from the kit's technical data.

Codes This Kit Clears

The 1800442 addresses P0340, P0344, P0345, P0349, P0365, P0369, P0390, and the P0011/P0012 VVT correlation faults. The 1800441 covers P0335, P0336, P0339, P0315, and P0300 to P0304. Definitions follow ISO 27145-4 (WWH-OBD) and SAE J2012-DA (2026 Edition).

Run as a set, the pair also prevents erroneous P0300 to P0304 misfire codes and U0401 invalid-data faults on the CAN-bus 3.0 network. If a rough-running complaint on an older MX-5 traces to air metering rather than timing, Koeep also lists a MAF mass air flow sensor meter for the 2010 Mazda MX-5 Miata, RX-8, and Toyota 4Runner.

Fitment Beyond the ND3

Backward compatibility maps to real part numbers, so match the number on your old sensor against this list:

• BP4W-18-221A/B: 1999–2005 NB Miata
• ZL01-18-221A: 1998–2004 Mazda 323 BJ
• J5T27071 / J5T27072: 2002–2007 Mazda Demio DY

Only need the crank sensor on one of those cars? Koeep sells it on its own as a crankshaft position sensor for the Mazda 323, Demio, and Miata MX-5 (J5T27072 / ZL0118221A).

Also on the Koeep blog: a 2026 technical review of front struts and shocks for the 1990–1997 Mazda Miata, worth a look if your NA or early NB needs suspension work alongside sensors.

Materials, Testing, and Lifecycle

• PPS body conforms to SAE J1639 (Classification for Automotive PPS Composites) with a UL 94 V-0 flammability rating.
• InSb Hall IC qualified to AEC-Q100 Grade 0: -40°C to +150°C ambient, extended to +180°C junction.
• Connector terminals meet SAE/USCAR-2 Rev.7 performance class 3 (150°C, gold-plated).
• Certifications: ISO 27145, SAE J2716-B, ISO/SAE 21434, and RoHS 3 (EU 2025/2026) with full material disclosure. REACH SVHC screening shows zero substances above the 0.1% w/w threshold.
• Validation: 1,000 accelerated thermal cycles from -40°C to +180°C, plus ISO 16750-3 Test VII random vibration (10–2,000 Hz, 27.8 m/s² RMS). Each unit ships with a QR-coded batch traceability label for forward and reverse lot tracking under ISO/TS 16949.

The SKU is 1800442-1800441-KIT. Projected service life runs 2026–2030, covering the full ND3 production run and extending through the anticipated ND4 transition (2028–2030). MTBF is rated at 100,000 miles / 10 years under normal operating conditions.

Frequently Asked Questions