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Volvo 740 Oxygen Sensors
25 itemsShop best-selling oxygen sensors for Ford, Chevy, Honda, Nissan, Toyota, and more. Direct-fit O2 sensors with fast response, improved MPG, and reliable emissions performance.
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A-Premium®Part # APOS0039
1-Pc O2 Oxygen Sensor A-Premium APOS0039
4.5668 Reviews
$29.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997 - 1998 Aston Martin DB7, 1996 - 1997 Audi S6, 1994 - 1994 Jaguar XJ12, 1994 - 1994 Jaguar XJS, 1994 - 1994 Jaguar XJS, 1993 - 1993 Jaguar XJRS, 1993 - 1993 Jaguar XJS, 1992 - 1994 Jaguar Vanden Plas, 1992 - 1994 Jaguar XJ6, 1991 - 1993 Volvo 940, 1991 - 1992 Yugo Cabrio, 1991 - 1992 Yugo GV, 1989 - 1991 Volvo 780, 1988 - 1988 Alfa Romeo Milano, 1988 - 1988 Alfa Romeo Milano, 1986 - 1987 Volvo 244, 1986 - 1987 Volvo 245, 1985 - 1992 Volvo 740, 1985 - 1990 Volvo 760, 1985 - 1987 Audi 4000
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Vehicle: Volvo 740
Installation PositionCheck the fitment chart
Item LocatedUnited States
ConditionNew
item #10030AGU
Note
【Note-1】For 740 & 745 & 940, this item fits Turbocharged, not fit Naturally Aspirated.
【Note-2】For L6 4.0L 1993-1994 XJS, this item fits Cylinder 1-3/4-6.
【Note-2】For L6 4.0L 1993-1994 XJS, this item fits Cylinder 1-3/4-6.
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A-Premium®Part # APOS1859
1-Pc O2 Oxygen Sensor Upstream A-Premium APOS1859
4.5668 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1990 - 1990 Volvo 740, 1989 - 1992 Volvo 740, 1989 - 1989 Volvo 740
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Vehicle: Volvo 740
Installation PositionUpstream
Item LocatedUnited States
ConditionNew
item #10026DTK
Note
Oxygen Senor - B1S1 Indicates Bank 1 Sensor 1.
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A-Premium®Part # APOS1855
1-Pc O2 Oxygen Sensor A-Premium APOS1855
4.5668 Reviews
$29.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1996 - 1997 Audi A6, 1995 - 1997 Audi A6 Quattro, 1995 - 1995 Audi A6, 1994 - 1998 Audi Cabriolet, 1994 - 1995 Audi 90 Quattro, 1994 - 1994 Audi 100, 1994 - 1994 Audi 100 Quattro, 1993 - 1995 Audi 90, 1993 - 1993 Audi 100, 1993 - 1993 Audi 100 Quattro, 1993 - 1993 Audi 90 Quattro, 1988 - 1988 Ferrari Mondial 3.2, 1988 - 1988 Saab 900, 1988 - 1988 Volvo 244, 1988 - 1988 Volvo 245, 1987 - 1989 Saab 9000, 1986 - 1989 Ferrari 328 GTS, 1985 - 1988 Volvo 740, 1985 - 1986 Volvo 740, 1985 - 1985 Volvo 244
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Vehicle: Volvo 740
Installation PositionCheck the fitment chart
Item LocatedUnited States
ConditionNew
item #10026A8Q
Note
O2 Sensor - Bank 1 Sensor 1 (B1S1).
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AisinPart # OXSAZ-01129
Upstream O2 Oxygen Sensor | 1-Pc Direct-Fit | Aisin OXSAZ-01129
4.5668 Reviews
$43.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997 - 1998 Aston Martin DB7, 1996 - 1997 Audi S6, 1994 - 1994 Jaguar XJ12, 1994 - 1994 Jaguar XJS, 1993 - 1994 Jaguar XJS, 1993 - 1993 Jaguar XJRS, 1992 - 1994 Jaguar Vanden Plas, 1992 - 1994 Jaguar XJ6, 1991 - 1993 Volvo 940, 1991 - 1992 Yugo Cabrio, 1991 - 1992 Yugo GV, 1989 - 1991 Volvo 780, 1988 - 1988 Alfa Romeo Milano, 1986 - 1987 Volvo 244, 1986 - 1987 Volvo 245, 1985 - 1992 Volvo 740, 1985 - 1987 Audi 4000, 1985 - 1986 Volvo 760, 1985 - 1985 Volvo 745, 1984 - 1990 Volvo 760
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
ConditionNew
item #1018EPA9
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DensoPart # 234-3000
Oxygen Sensor - Denso 234-3000
4.29 Reviews
$53.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2001-2002 Mazda Millenia, 2000-2000 Mazda Millenia, 1999-1999 Mazda Millenia, 1998-1999 Mazda 626, 1998-1998 Mazda Millenia, 1997-1997 Ford Probe, 1997-1997 Mazda 626, 1997-1997 Mazda Millenia, 1997-1997 Mazda MX-6, 1996-1998 Volkswagen Golf, 1996-1997 Kia Sephia, 1996-1996 Ford Probe, 1996-1996 Mazda 626, 1996-1996 Mazda Millenia, 1996-1996 Mazda Millenia, 1996-1996 Mazda MX-3, 1996-1996 Mazda MX-6, 1995-1998 Mazda Protege, 1995-1996 Mazda Millenia, 1995-1995 Chevrolet Blazer
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Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
234-3000, 213-1241, 213-1242, OS516, OS521, 13589, 13936, 13508,
...View moreitem #1002HP48
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BoschPart # 13034
Oxygen Sensor - Upstream - Bosch 13034
46 Reviews
$107.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1993 Volvo 940, 1992-1992 Volvo 940, 1992-1992 Volvo 940, 1992-1992 Volvo 940, 1991-1992 Volvo 740, 1991-1991 Volvo 940, 1990-1992 Volvo 240, 1990-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 244, 1989-1989 Volvo 245, 1989-1989 Volvo 740, 1987-1990 Volvo 760, 1987-1988 Volvo 780
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
13034, 3501753
item #1002C3A6
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DensoPart # 234-3090
Denso 234-3090 Oxygen Sensor
4.29 Reviews
$72.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2004-2004 Nissan Altima, 2004-2004 Nissan Frontier, 2004-2004 Nissan Xterra, 2003-2003 INFINITI QX4, 2002-2004 INFINITI I35, 2002-2003 Nissan Altima, 2002-2003 Nissan Frontier, 2002-2003 Nissan Xterra, 2002-2002 INFINITI QX4, 2001-2001 Nissan Frontier, 2001-2001 Nissan Sentra, 2001-2001 Nissan Xterra, 2001-2001 Nissan Xterra, 2001-2001 Nissan Xterra, 2000-2001 INFINITI QX4, 2000-2001 Nissan Sentra, 2000-2001 Nissan Sentra, 2000-2000 Nissan Xterra, 1999-2002 INFINITI G20, 1999-1999 Subaru Forester
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Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
234-3090, 13224, 13562, 13329, 13019, 15343, 13160, 13350,
...View moreitem #1003RWWP
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BoschPart # 15737
Oxygen Sensor - Upstream - Bosch 15737
46 Reviews
$74.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1995 Volvo 940, 1993-1993 Mercedes-Benz 300TE, 1992-1994 Volvo 960, 1992-1992 Volvo 940, 1992-1992 Volvo 940, 1992-1992 Volvo 940, 1991-1993 Mercedes-Benz 190E, 1991-1992 Volvo 740, 1991-1991 Mercedes-Benz 300E, 1991-1991 Mercedes-Benz 300E, 1991-1991 Volvo 940, 1990-1993 Mercedes-Benz 300SL, 1990-1993 Volvo 240, 1990-1992 Mercedes-Benz 300CE, 1990-1992 Mercedes-Benz 300E, 1990-1992 Mercedes-Benz 300TE, 1990-1991 Mercedes-Benz 300SE, 1990-1991 Mercedes-Benz 300SEL, 1990-1990 Volvo 740, 1989-1990 Volvo 780
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Vehicle: Volvo 740
QuantityOne Set
Installation PositionUpstream
Item LocatedUnited States
Part interchange
15737
item #1002DU5D
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BoschPart # 15735
Bosch 15735 Oxygen Sensor
46 Reviews
$64.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2003-2004 Nissan Frontier, 2003-2004 Nissan Xterra, 2002-2004 INFINITI I35, 2002-2004 Nissan Altima, 2002-2003 INFINITI QX4, 2002-2003 Nissan Maxima, 2001-2002 Nissan Pathfinder, 2001-2001 INFINITI G20, 2001-2001 INFINITI QX4, 2001-2001 Nissan Altima, 2001-2001 Nissan Maxima, 2001-2001 Nissan Sentra, 2001-2001 Nissan Sentra, 2000-2001 INFINITI I30, 2000-2001 Nissan Sentra, 2000-2000 INFINITI G20, 2000-2000 Nissan Maxima, 2000-2000 Nissan Sentra, 1999-1999 INFINITI I30, 1999-1999 Nissan Maxima
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Vehicle: Volvo 740
QuantityOne Set
Item LocatedUnited States
Part interchange
15735, 94460613500
item #1002DVCT
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BoschPart # 13957
Bosch 13957 Oxygen Sensor
46 Reviews
$76.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1995-1997 Audi S6, 1994-1994 Saab 900, 1994-1994 Saab 900, 1993-1993 Hyundai Scoupe, 1993-1993 Hyundai Scoupe, 1992-1994 Audi S4, 1991-1994 Alfa Romeo Spider, 1991-1993 Volvo 940, 1991-1992 Volvo 740, 1991-1991 Volvo 780, 1991-1991 Volvo 940, 1990-1994 Audi V8 Quattro, 1990-1992 Volkswagen Golf, 1990-1992 Volkswagen Jetta, 1990-1991 Audi Coupe Quattro, 1990-1990 Ferrari 348 TB, 1990-1990 Ferrari 348 TS, 1990-1990 Ferrari Mondial t, 1990-1990 Volkswagen Passat, 1990-1990 Volvo 740
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Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
13957, 121515, 125881, 034906265A, 034906265F, 077906265, 7525603, 9392762,
...View moreitem #1002D96A
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Walker ProductsPart # 350-33015
Walker Products 350-33015 Oxygen Sensor, Upstream
56 Reviews
$141.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1991-1992 Volvo 740, 1990-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 740
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
350-33015
item #1001P9QD
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Walker ProductsPart # 250-23811
Walker Products 250-23811 Oxygen Sensor, Upstream
56 Reviews
$152.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1991-1992 Volvo 740, 1990-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 740
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
250-23811
item #1001PDNY
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Walker ProductsPart # 350-33036
Walker Products 350-33036 Oxygen Sensor, Upstream
56 Reviews
$94.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1993 Volvo 240, 1992-1994 Volvo 960, 1991-1992 Volvo 740, 1991-1991 Volvo 940, 1990-1992 Volvo 240, 1990-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 244, 1989-1989 Volvo 245, 1987-1990 Volvo 760, 1987-1988 Volvo 780
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
350-33036
item #1001P91E
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Walker ProductsPart # 250-23019
Walker Products 250-23019 Oxygen Sensor
56 Reviews
$82.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1998 Aston Martin DB7, 1996-1997 Audi S6, 1994-1994 Jaguar XJ12, 1994-1994 Jaguar XJS, 1994-1994 Jaguar XJS, 1993-1993 Jaguar XJRS, 1993-1993 Jaguar XJS, 1992-1994 Jaguar Vanden Plas, 1992-1994 Jaguar XJ6, 1991-1993 Volvo 940, 1991-1992 Volvo 740, 1991-1992 Yugo Cabrio, 1991-1992 Yugo GV, 1991-1991 Volvo 780, 1991-1991 Volvo 940, 1990-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 740, 1988-1988 Alfa Romeo Milano, 1987-1987 Audi 4000
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
250-23019
item #1001PDSA
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Walker ProductsPart # 250-23033
Walker Products 250-23033 Oxygen Sensor, Upstream
56 Reviews
$97.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1993 Volvo 240, 1992-1994 Volvo 960, 1991-1992 Volvo 740, 1991-1991 Volvo 940, 1990-1992 Volvo 240, 1990-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 244, 1989-1989 Volvo 245, 1987-1990 Volvo 760, 1987-1988 Volvo 780
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Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
250-23033
item #1001PE7L
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DensoPart # 234-3028
Oxygen Sensor - Upstream - Denso 234-3028
4.29 Reviews
$65.99
Low stock: Only 1 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1988-1988 Saab 900, 1988-1988 Volvo 244, 1988-1988 Volvo 245, 1987-1989 Saab 9000, 1986-1991 Volkswagen Transporter, 1986-1991 Volkswagen Vanagon, 1986-1988 Volvo 740, 1985-1988 Volvo 740, 1985-1985 Volvo 244, 1985-1985 Volvo 245, 1985-1985 Volvo 745
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Installation PositionUpstream
Item LocatedUnited States
Part interchange
234-3028, 25576, 25034, 7525603, 213-3059, 213-1244, OS517, OS543,
...View moreitem #1003S10L
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Walker ProductsPart # 350-33077
Walker Products 350-33077 Oxygen Sensor
56 Reviews
$66.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1998 Aston Martin DB7, 1996-1997 Audi S6, 1994-1994 Jaguar XJ12, 1994-1994 Jaguar XJS, 1994-1994 Jaguar XJS, 1993-1993 Jaguar XJRS, 1993-1993 Jaguar XJS, 1992-1994 Jaguar Vanden Plas, 1992-1994 Jaguar XJ6, 1991-1993 Volvo 940, 1991-1992 Volvo 740, 1991-1992 Yugo Cabrio, 1991-1992 Yugo GV, 1991-1991 Volvo 780, 1991-1991 Volvo 940, 1990-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 740, 1988-1988 Alfa Romeo Milano, 1987-1987 Audi 4000
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
350-33077
item #1001P95Z
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Walker ProductsPart # 350-33059
Walker Products 350-33059 Oxygen Sensor
56 Reviews
$63.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1998-1998 Audi Cabriolet, 1997-1997 Audi A6, 1997-1997 Audi Cabriolet, 1996-1997 Audi A6 Quattro, 1995-1996 Audi A6, 1995-1995 Audi A6 Quattro, 1994-1996 Audi Cabriolet, 1994-1995 Audi 90, 1994-1995 Audi 90 Quattro, 1994-1994 Audi 100, 1994-1994 Audi 100 Quattro, 1993-1993 Audi 100, 1993-1993 Audi 100 Quattro, 1993-1993 Audi 90, 1993-1993 Audi 90 Quattro, 1988-1988 Ferrari Mondial 3.2, 1988-1988 Saab 900, 1988-1988 Saab 900, 1988-1988 Volvo 244, 1988-1988 Volvo 245
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
350-33059
item #1001PCH2
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Walker ProductsPart # 250-23028
Walker Products 250-23028 Oxygen Sensor
56 Reviews
$74.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1998 Audi Cabriolet, 1997-1997 Audi A6, 1997-1997 Audi A6 Quattro, 1996-1996 Audi A6, 1996-1996 Audi A6 Quattro, 1996-1996 Audi Cabriolet, 1995-1995 Audi 90 Quattro, 1995-1995 Audi A6, 1995-1995 Audi A6 Quattro, 1994-1995 Audi 90, 1994-1995 Audi Cabriolet, 1994-1994 Audi 100, 1994-1994 Audi 100 Quattro, 1994-1994 Audi 90 Quattro, 1993-1993 Audi 100, 1993-1993 Audi 100 Quattro, 1993-1993 Audi 90, 1993-1993 Audi 90 Quattro, 1988-1988 Ferrari Mondial 3.2, 1988-1988 Saab 900
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
250-23028
item #1001P913
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ÜRO PartsPart # 3501753
ÜRO Parts 3501753 Oxygen Sensor
4.535 Reviews
$66.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1993 Volvo 940, 1992-1992 Volvo 940, 1991-1993 Volvo 240, 1991-1992 Volvo 740, 1991-1991 Volvo 940, 1990-1990 Volvo 240, 1990-1990 Volvo 740, 1990-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 740, 1989-1990 Volvo 780, 1989-1989 Volvo 244, 1989-1989 Volvo 245, 1987-1990 Volvo 760, 1987-1988 Volvo 780
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Volvo 740
Quantity1
Item LocatedUnited States
Part interchange
3501753, 3501753, 1378123, 13034, ES10957, 234-3033, 107030, 175965,
...View moreitem #1000ZGY0
Show less
Your vehicle’s oxygen sensor (also known as O2 sensors) plays a critical role in engine performance, fuel efficiency, and emissions control. By continuously measuring the amount of unburned oxygen in the exhaust, the oxygen sensor sends real-time feedback to your engine control unit (ECU), ensuring the perfect air-fuel mixture.
When an oxygen sensor fails, your engine essentially runs “blind,” leading to poor fuel economy, rough idling, reduced performance, and a persistent check engine light. A timely front oxygen sensor replacement or replacement of a faulty upstream oxygen sensor or downstream oxygen sensor can restore optimal driving conditions and help you pass emissions tests with ease.
Why Choose A-Premium Oxygen Sensors?
Unlike universal parts that require cutting and splicing wires, A-Premium O2 sensors are engineered for direct plug-and-play installation.
- OEM-style connectors for seamless fit
- Pre-coated anti-seize threads for easy installation
- Laser-welded body construction for durability
- High-temperature sintered coating for long service life
- Premium insulation sheathing and impact-resistant design
- Slotted guard tube for sensor protection
- High heat dissipation structure for extreme environments
Advanced Performance & Precision
A-Premium oxygen sensor technology ensures fast, accurate, and stable performance:
Performance & Response
- ≤200ms fast response time
- High-efficiency oxygen sensing
- Zirconia sensing element
- Real-time signal feedback
Precision & Control
- Real-time exhaust tracking
- Accurate combustion control
- Stable signal output
Efficiency & Engine Benefits
- Improved fuel efficiency
- Enhanced engine performance
- Reduced harmful emissions
- Extended engine lifespan
Environmental Adaptability
- Operating range: -40°F to 266°F
- Air-tight sealing design
- Stable performance under harsh conditions
3 Symptoms of a Bad Oxygen Sensor
Because O2 sensors operate in extreme heat and carbon-rich environments, they naturally degrade over time.
- Check Engine Light (CEL): Common codes include P0135, P0171, and P0420. These often point to issues with an upstream oxygen sensor or oxygen sensor bank 1.
- Poor Fuel Economy: A faulty oxygen sensor may cause a rich fuel mixture, dramatically lowering MPG. 20-40% worse fuel economy overnight.
- Rough Idle & Stalling: Incorrect readings from your downstream oxygen sensor or upstream sensor can disrupt engine stability.
- Rotten egg smell: Catalytic converter overheating from bad fuel mixture
Understanding O2 Sensor Positions: Upstream vs Downstream
Modern vehicles may have multiple oxygen sensor units, making it essential to identify the correct one:
- Oxygen Sensor Bank 1vs Bank 2
- oxygen sensor bank 1 refers to the side of the engine with Cylinder #1
- Bank 2 is the opposite side
- Upstream Oxygen Sensor(Sensor 1)
- Located before the catalytic converter
- Controls air-fuel ratio
- Most common need for front oxygen sensor replacement
- Downstream Oxygen Sensor(Sensor 2)
- Located after the catalytic converter
- Monitors emissions system efficiency
Tip: Always match your diagnostic code to the correct upstream oxygen sensor or downstream oxygen sensor before purchasing.
Complete Your Emissions Repair
Replacing your oxygen sensor is often part of a larger emissions system fix. Consider inspecting these related components:
- Catalytic Converter: Persistent issues after replacing a downstream oxygen sensor may indicate converter failure
- MAF Sensor: Works with your oxygen sensor to calculate air intake
- Ignition Coils & Spark Plugs: Misfires can damage O2 sensors quickly
Shop by Popular Makes
To help you quickly find the right oxygen sensor, explore our most popular vehicle-specific options:
Browse our most searched and best-selling vehicle-specific oxygen sensor options to quickly locate the right fit for your car.
Frequently Asked Questions
Can I clean my oxygen sensor instead of replacing it?
Should I replace O2 sensors in pairs?
Do I need a special tool?
How long do oxygen sensors last?
What’s the difference between upstream and downstream sensors?
What happens if I ignore a bad oxygen sensor?
How do I know if it’s Bank 1 or Bank 2?
Will replacing an oxygen sensor improve MPG?
How do oxygen sensor voltages relate to fuel mixture?
How much does it cost to replace an oxygen sensor?
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Oct 14, 2026
Why Is My Car Running Worse After a New O2 Sensor?
Car running worse after O2 sensor replacement? Check part compatibility, wiring, and exhaust leaks before assuming a bad sensor. Learn to diagnose fuel trims, verify installation, and avoid costly mistakes with this step-by-step guide.
Oct 13, 2026
Can I Use a Downstream Oxygen Sensor for Upstream?
No, upstream and downstream O2 sensors are rarely interchangeable. Differences in technology, electrical specs, and function mean swapping them causes engine issues. Learn why mixing them fails and how to identify the correct sensor for your vehicle.
Oct 12, 2026
P0130 Code: Bank 1 Sensor 1 O2 Circuit Diagnosis & Fixes
Diagnose P0130 (Bank 1 Sensor 1 O2 Circuit) accurately. Avoid guessing: check wiring, exhaust leaks, and engine conditions before replacing the sensor. Learn proper testing steps, safety tips, and how to confirm the fix for lasting results.
Sep 29, 2026
Can You Clean an O2 Sensor to Make It Work Again?
Cleaning an O2 sensor rarely fixes internal faults or chemical poisoning. Learn to diagnose root causes, interpret deposit colors, avoid damaging methods, and determine when replacement is the only reliable solution for engine health.
Sep 22, 2026