Z33Seller listing
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View listing at Z1 Motorsports; opens in a new tab350Z/G35 · Buyer's guide
350Z Air/Fuel and Oxygen Sensors: Upstream vs Downstream, DE vs HR
US-spec 2003-2008 Nissan 350Z; connector, production date, engine, bank, and upstream/downstream position must be matched.
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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Z33Seller listing
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View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Z1 Motorsports; opens in a new tabZ33Seller listing
Listed priceSee seller for current price
View listing at Nissan Parts Deal; opens in a new tabWhat you need to know
Upstream sensors are air/fuel-ratio sensors and downstream sensors monitor catalyst performance. Read the DTC and confirm bank, sensor position, connector pin count, engine, and production date before ordering. Do not use a downstream oxygen sensor as an upstream A/F substitute.
OEM numbers
Verified examples: 2005+ VQ35DE upstream 22693-CD700VQ35DE right rear 226A0-AM6012007 VQ35HR upstream 22693-ZE00A2008 EPC also shows alternate 22693-1NA0A. Earlier DE and downstream numbers vary by date/side, so no universal four-sensor set is claimed.Supersession
No universal chain is claimed. 22693-ZE00A and 22693-1NA0A are recorded as catalog alternatives, not a proven sequential supersession.
Fitment
Upstream sensors are air/fuel-ratio sensors and downstream sensors monitor catalyst performance. Read the DTC and confirm bank, sensor position, connector pin count, engine, and production date before ordering. Do not use a downstream oxygen sensor as an upstream A/F substitute.
Aftermarket options
Checked OEM Nissan and Denso direct-fit paths. Avoid universal splice-in sensors unless the manufacturer documents the exact electrical application and connector procedure.
Before you buy
Never order only by a generic four-sensor diagram. Confirm DTC, engine, model year/production date, bank, upstream/downstream position, and connector. A catalyst-efficiency code does not automatically prove the downstream sensor is bad.
Research and fitment sources
Supersede reviewed 10 unique research sources for this guide. 6 also appear above as a seller or official action and are not repeated here; 4 additional citations follow.
Research last verified .