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2003 Ford Focus

2003 Ford Focus Oxygen Sensors

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After Catalytic Converter Oxygen Sensor, Sold Individualy, 4-Wire, 4 Cylinder, 2.0L Engine, B1S2
Part Number: REPF960904
Guaranteed to Fit
$19.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L B1S2
  • 2003 Ford Focus LX 4 Cyl 2.0L B1S2
  • 2003 Ford Focus SVT 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZTW 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZX3 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZX5 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZTS 4 Cyl 2.0L B1S2
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024001Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
After Catalytic Converter Oxygen Sensors, 4-wire, 4 Cyl., 2.0L Engine, B1S2
Part Number: SET-REPF960904-2
Guaranteed to Fit
$38.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L B1S2
  • 2003 Ford Focus LX 4 Cyl 2.0L B1S2
  • 2003 Ford Focus SVT 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZTW 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZX3 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZX5 4 Cyl 2.0L B1S2
  • 2003 Ford Focus ZTS 4 Cyl 2.0L B1S2
Product Details
Location : After Catalytic ConverterComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 15.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Before Catalytic Converter Oxygen Sensor, 4-Wire, Heated
Part Number: RF96090002
Guaranteed to Fit
$19.73
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZX5 4 Cyl 2.3L B1S1
  • 2003 Ford Focus LX 4 Cyl 2.3L B1S1
  • 2003 Ford Focus SE 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZTS 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZX3 4 Cyl 2.3L B1S1
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 25024678Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Center Oxygen Sensor 4-wire, Heated, B1S2
Part Number: RF96090006
Guaranteed to Fit
$23.70
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.3L B1S2
  • 2003 Ford Focus ZTS 4 Cyl 2.3L B1S2
  • 2003 Ford Focus ZTW 4 Cyl 2.3L B1S2
  • 2003 Ford Focus ZX5 4 Cyl 2.3L B1S2
  • 2003 Ford Focus LX 4 Cyl 2.3L B1S2
  • 2003 Ford Focus ZX3 4 Cyl 2.3L B1S2
Product Details
Location : CenterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.6 in. Wire LengthInterchange Part Number : 25024651Warranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
After Catalytic Converter Oxygen Sensor, 4-Wire, Heated
Part Number: RF96090003
Guaranteed to Fit
$16.49
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.3L B1S3
  • 2003 Ford Focus ZX5 4 Cyl 2.3L B1S3
  • 2003 Ford Focus LX 4 Cyl 2.3L B1S3
  • 2003 Ford Focus SE 4 Cyl 2.3L B1S3
  • 2003 Ford Focus ZTS 4 Cyl 2.3L B1S3
  • 2003 Ford Focus ZX3 4 Cyl 2.3L B1S3
Product Details
Location : After Catalytic ConverterNotes : Downstream (After Secondary Converter)Type : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitThread Size : 0.71 in. Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 25024656Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 30-Day Return Policy
Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024302
Guaranteed to Fit
$32.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L Eng. VIN: P, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus LX 4 Cyl 2.0L Eng. VIN: P, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus SVT 4 Cyl 2.0L Eng. VIN: 5, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus ZX3 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus ZTW 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus ZX5 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS, B1S1
  • 2003 Ford Focus ZTS 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS, B1S1
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 19.69 in. Wire LengthInterchange Part Number : 15718Warranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Original Equipment Base Sensor
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034210
Guaranteed to Fit
$33.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L Eng. VIN: P, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus LX 4 Cyl 2.0L Eng. VIN: P, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus SVT 4 Cyl 2.0L Eng. VIN: 5, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZX3 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZTW 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZX5 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZTS 4 Cyl 2.0L Eng. VIN: 3, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 19.69 in. Wire LengthWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Aftermarket Base Sensor
Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344609
Guaranteed to Fit
$33.49
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L SOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus LX 4 Cyl 2.0L SOHC, O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : ES20104Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Oxygen Sensor, Sold individually 4-wire
Part Number: NG22060
Guaranteed to Fit
$39.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L
  • 2003 Ford Focus LX 4 Cyl 2.0L
  • 2003 Ford Focus SVT 4 Cyl 2.0L
  • 2003 Ford Focus ZX3 4 Cyl 2.0L
  • 2003 Ford Focus ZTW 4 Cyl 2.0L
  • 2003 Ford Focus ZX5 4 Cyl 2.0L
  • 2003 Ford Focus ZTS 4 Cyl 2.0L
Product Details
Location : Before Catalytic ConverterNotes : Heated Sensor TypeType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.5 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 2344609, ES20104Warranty : NGK limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344045
Guaranteed to Fit
$36.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus LX 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus SVT 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZX3 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZTW 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZX5 4 Cyl 2.0L O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZTS 4 Cyl 2.0L O.E. Quality Replacement Sensor
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 2344609, ES20104Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Downstream OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS15753
Guaranteed to Fit
$66.99
Vehicle Fitment
  • 2003 Ford Focus SE 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
  • 2003 Ford Focus ZTS 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
  • 2003 Ford Focus ZTW 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
  • 2003 Ford Focus ZX5 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
  • 2003 Ford Focus LX 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
  • 2003 Ford Focus ZX3 4 Cyl 2.3L Located After Primary Converter; OE Sensor Technology
Product Details
Location : DownstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.4 in. Wire LengthInterchange Part Number : 22124Warranty : 1-year Bosch limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsSeries : OE Replacement Series
Before Catalytic Converter Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024678
Guaranteed to Fit
$56.49
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZX5 4 Cyl 2.3L B1S1
  • 2003 Ford Focus LX 4 Cyl 2.3L B1S1
  • 2003 Ford Focus SE 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZTS 4 Cyl 2.3L B1S1
  • 2003 Ford Focus ZX3 4 Cyl 2.3L B1S1
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.11 in. Wire LengthInterchange Part Number : RF96090002Warranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Original Equipment Base Sensor
After Catalytic Converter Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344608
Guaranteed to Fit
$38.49
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZX5 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZX3 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus SVT 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus ZTS 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
  • 2003 Ford Focus SE 4 Cyl 2.0L DOHC, O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 15717Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

After Catalytic Converter Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034051
Guaranteed to Fit
$32.99
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZX5 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus LX 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus SE 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZTS 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
  • 2003 Ford Focus ZX3 4 Cyl 2.3L Eng. VIN: Z, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.75 in. Wire LengthWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Aftermarket Base Sensor
After Catalytic Converter Oxygen Sensor, Sold individually 4-wire
Part Number: NG22106
Guaranteed to Fit
$41.49
Vehicle Fitment
  • 2003 Ford Focus ZTW 4 Cyl 2.0L DOHC
  • 2003 Ford Focus ZX5 4 Cyl 2.0L DOHC
  • 2003 Ford Focus ZX3 4 Cyl 2.0L DOHC
  • 2003 Ford Focus SVT 4 Cyl 2.0L DOHC
  • 2003 Ford Focus ZTS 4 Cyl 2.0L DOHC
  • 2003 Ford Focus SE 4 Cyl 2.0L DOHC
Product Details
Location : After Catalytic ConverterNotes : Heated Sensor TypeType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 30 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 15717Warranty : NGK limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Helpful Automotive Resources

P2187 Code: System too Lean at Idle (Bank 1)
P2187 Code: System too Lean at Idle (Bank 1)Note that there is only one bank if your car has a straight engine and the scan tool will always refer to that bank as “Bank 1.” P2187 code indicates that your vehicle’s computer detected a potential issue with the fuel mixture at idle.
P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)
P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)Bank 1 is where the #1 spark plug is. O2 sensor 1/1 is the upstream sensor on Bank 1 (different for a Ford than for a Chevy or a Dodge), and O2 sensor 1/2 is the downstream sensor on Bank 1. O2 2/1 is upstream on Bank 2 and O2
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)With that in mind, it’s important to note that Bank 1 is always where the number 1 cylinder is located. Thus, on Ford pickups, Bank 1 is the passenger side bank, but on Chevy and Dodge pickups, Bank 1 is the driver side bank. You need to know this, or
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3Bank 1 is the side of the engine where the #1 cylinder is located. P0042 code is set when your car’s PCM determines a potential problem with the heater element circuit of the oxygen sensor.
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)Diagnostic trouble code (DTC) P0135 stands for “Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1).” It is set when the car’s primary computer—also called the powertrain control module or PCM—determines that the heated oxygen sensor (HO2S) 1 heater current is higher or lower than the ideal amp for
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)The Bank 1 portion of the code refers to the side of the engine with the number one cylinder. Sensor 1 refers to the upstream O2 sensor.