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2011 Smart Fortwo

Oxygen Sensors

Some telltale signs that your oxygen sensor is starting to fail include the check engine light coming on, poor fuel economy, and the engine running rough. Get a replacement as soon as you confirm that your oxygen sensor is bad. The great news is that here at CarParts.com, we have an oxygen sensor replacement for every application (upstream, downstream, before/after the catalytic converter, etc.). Choose from our wide range of high-quality O2 sensors manufactured by the most reputable names in the industry.
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After Catalytic Converter Oxygen Sensor, 4-wire, 3 Cylinder, 1.0L Engine, B1S2
Part Number: REPD960905
Guaranteed to Fit
$16.00
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L B1S2
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.7 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024675Connector Gender : Female 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, Driver and Passenger Side Oxygen Sensors, 5-wire, Wideband Sensor, 1.0L Engine, 3 Cylinder
Part Number: REPB960915
Guaranteed to Fit
$63.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L Naturally Aspirated, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25025042Connector 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 5-wire
Part Number: WKP25025042
Guaranteed to Fit
$92.49
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L Naturally Aspirated, B1S1
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L Naturally Aspirated, B1S1
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 in. Wire LengthInterchange Part Number : REPB960915Warranty : 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
Oxygen Sensor, Sold individually 4-wire
Part Number: FAC108202
Guaranteed to Fit
$45.49
Vehicle Fitment
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure All Engines
Product Details
Location : RearNotes : Switching PlanarType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 11.81 in. Wire LengthReplaces OE Number : A0035428218, A0035428118, A0045420718Interchange Part Number : A0035428218, A0035428118, A0045420718Warranty : Facet 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.

OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS16749
Guaranteed to Fit
$56.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L
Product Details
Location : DownstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13 in. Wire LengthInterchange Part Number : 13937Warranty : 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
Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344881
Guaranteed to Fit
$50.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.4 in. Wire LengthReplaces OE Number : 56029085AAInterchange Part Number : 15510Warranty : 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.

Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034360
Guaranteed to Fit
$35.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L Naturally Aspirated
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.7 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
Part Number: Z8YV30760039
Guaranteed to Fit
$61.49
Vehicle Fitment
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L
Product Details
Location : Before or After Catalytic Converter, RearNotes : 31 mm Height; 360 mm Length; 125 mm WidthQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 8.66 in. Wire LengthThread Size : M18 x 1.5 thread sizeReplaces OE Number : 0035428218, 0045420718, 0045420818, A0035428218, A0045420718, A0045420818Interchange Part Number : 0035428218, 0045420718, 0045420818, A0035428218, A0045420718, A0045420818Connector Shape : Angular Connector ShapeWarranty : 24-month or 24,000-mile Vemo 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 Parts
Oxygen Sensor, Sold individually 4-wire
Part Number: DELES20181
Guaranteed to Fit
$64.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L
Product Details
Location : RearType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.7 in. Wire LengthThread Size : 18 x 1.5 mm Thread SizeInterchange Part Number : 15730, SG300Warranty : 1-year or 12,000-mile Delphi 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.

Front Oxygen Sensor, Sold individually 5-wire
Part Number: FAC108465
Guaranteed to Fit
$79.99
Vehicle Fitment
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L
Product Details
Location : FrontType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14 in. Wire LengthReplaces OE Number : A0055429818Interchange Part Number : A0055429818Warranty : Facet 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.

Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 5-wire
Part Number: WKP35035076
Guaranteed to Fit
$100.49
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L Naturally Aspirated
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L Naturally Aspirated
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 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
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS17444
Guaranteed to Fit
$164.49
Vehicle Fitment
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L
Product Details
Location : UpstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.8 in. wire lengthInterchange Part Number : 15730, SG300Warranty : 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
Oxygen Sensor, Sold individually 5-wire
Part Number: NG24329
Guaranteed to Fit
$166.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L B1S1, OE Equivalent Design
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L B1S1, OE Equivalent Design
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L B1S1, OE Equivalent Design
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L B1S1, OE Equivalent Design
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L B1S1, OE Equivalent Design
Product Details
Location : Before Catalytic ConverterNotes : 0.38 in. Thread Length; Heated Sensor TypeType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.8 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Non-flanged Mounting StyleWarranty : 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.

Before Catalytic Converter Oxygen Sensor, Sold individually 5-wire
Part Number: NP2345071
Guaranteed to Fit
$177.99
Vehicle Fitment
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L O.E. Quality Replacement Sensor
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L O.E. Quality Replacement Sensor
Product Details
Location : Before Catalytic ConverterType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitConnector Gender : Male ConnectorWarranty : 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.

Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024675
Guaranteed to Fit
$39.99
Vehicle Fitment
  • 2011 Smart Fortwo Brabus 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Brabus Cabrio 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Passion Cabrio 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Passion 3 Cyl 1.0L B1S2
  • 2011 Smart Fortwo Pure 3 Cyl 1.0L B1S2
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.7 in. Wire LengthInterchange Part Number : REPD960905Warranty : 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
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Product Questions & Answers

Q:Where is this instslled?
A shopper
A:BEST ANSWERHi, This is installed in the exhaust system, before or after the catalytic converter. Show less
Aldrin P.
 
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Shopping for Oxygen Sensor

Oxygen Sensor Shopping Info

What Is an Oxygen Sensor?

Modern vehicles are equipped with oxygen sensors, which monitor the amount of oxygen in the exhaust pipe. This part works with the engine control module to maintain your vehicle’s performance and keep its emissions in check.

How Much Does an Oxygen Sensor Replacement Cost?

Replacement oxygen sensors cost anywhere from $10 to $600 for the part alone. Factors that affect this part’s pricing include quantity, location, sensor type, and kit inclusions. Labor can cost you an additional $60 to $70, depending on where you live.

Shop for Aftermarket Oxygen Sensors on CarParts.com

Need to get an OE-grade oxygen sensor replacement fast? Here at CarParts.com, you don’t have to wait in line at a brick-and-mortar store just to get the part you need. With just a few clicks, you can get your orders delivered right to your doorstep in as fast as two business days.

Oxygen sensor replacements are typically sold individually, but you can also purchase them in sets of two or in kits that include catalytic converters. They’re also sold in a variety of inlet types and dimensions, so make sure to double-check if you’ve chosen a part with the right specifications.

With all these options and specifications to look out for, shopping for oxygen sensors can seem like an intimidating task. But with our user-friendly website, you can buy the right oxygen sensor in just a few clicks. Our products are manufactured in world-class facilities and have gone through strict tests to ensure their quality. This way, you can rest easy knowing that you’re getting high-quality products at unbeatable prices.

To view oxygen sensors and other compatible parts for your vehicle, use our vehicle selector tool and enter your vehicle’s specific year, make, and model. You can also indicate your preferences using our search filters. Buying oxygen sensors is easy and convenient here at CarParts.com. Shop now!

Helpful Automotive Resources

P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)P0141 is part of a family of codes listed as follows: P0141 – Sensor Heater Circuit Bank 1 Sensor 2 P0161 – Sensor Heater Circuit Bank 2 Sensor 2 P0135 – O2 Sensor Heater Circuit Bank 1 Sensor 1 P0155 – O2 Heater Circuit Bank 2, Sensor 1 Make sure you know bank 1 from
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3When there are only 3 O2 sensors it’s typically because there’s only one catalyst being monitored, and “Bank 1” is the default designation when there’s only one sensor in a category. Diagram showing 3 oxygen sensors | Image Source: Richard McCuistian
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)Due to this, the O2 sensor features an integrated heater circuit to bring it up to operating temperature after a cold start. When this circuit stops functioning properly, it can trigger a P0135. The oxygen sensor monitors your vehicle’s air-to-fuel ratio. What Does the P0135 Code Mean?