NB1/NB2Seller listing
Listed price$139.02 · $129.02
View listing at Gomiata; opens in a new tabMiata · Buyer's guide
1999-2005 NB Miata Crankshaft and Camshaft Position Sensors
US-market 1999-2000 NB1 and 2001-2005 NB2 1.8L only. NA adjustable cam-angle sensors are excluded.
Current seller options
WHERE TO BUY
Open an exact listing, then confirm fitment, stock, price, and shipping with the seller before ordering.
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NB1/NB2Seller listing
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View listing at Leroyengineering; opens in a new tabNB1/NB2Seller listing
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View listing at Planet Miata; opens in a new tabNB1/NB2Seller listing
Listed price$139.02 · $129.02
View listing at Gomiata; opens in a new tabNB1/NB2Seller listing
Listed priceSee seller for current price
View listing at Treasure Coast Miata; opens in a new tabNB1/NB2Seller listing
Listed priceSee seller for current price
View listing at Planet Miata; opens in a new tabChecking live eBay listing…
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What you need to know
NB 1.8L only. Separate crank and cam sensor locations and diagnose wiring/air gap before ordering. The fixed NB sensors are not interchangeable with the 1990-1997 adjustable CAS covered by MIA-0001.
OEM numbers
Checked references include crank-sensor family BPS1-18-221BP4W-18-221B and cam-sensor reference ZJ10-18-221. Confirm the number and connector on the removed sensor.Supersession
No cross-generation supersession is claimed. Seller descriptions differ in the printed crank reference, so physical connector and VIN/year confirmation remain required.
Fitment
NB 1.8L only. Separate crank and cam sensor locations and diagnose wiring/air gap before ordering. The fixed NB sensors are not interchangeable with the 1990-1997 adjustable CAS covered by MIA-0001.
Aftermarket options
Genuine Mazda, Mitsubishi, and application-specific aftermarket paths exist. Prefer an exact connector and bracket match; do not use an NA CAS listing.
Before you buy
Confirm whether the fault is crank or cam, inspect wiring and connector damage, and set/check the crank sensor air gap as the service procedure requires. These NB fixed sensors are not the NA CAS.
Research and fitment sources
Supersede reviewed 9 unique research sources for this guide. 6 also appear above as a seller or official action and are not repeated here; 3 additional citations follow.
Research last verified .