2017 Ford Fusion Air / Fuel Ratio Sensors
Save up to 40% on original replacement 2017 Ford Fusion Air / Fuel Ratio Sensors. Navigate our online catalogue to find Air / Fuel Ratio Sensors and other parts designed specifically to fit a 2017 Ford Fusion.
Air / Fuel Ratio Sensor - Upstream
$299.92
$117.44
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Aspiration: Turbocharged; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Aspiration: Turbocharged; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Vehicle Fitment Notes:
B1S1 OE Equivalent Design
B1S1 OE Equivalent Design
Air / Fuel Ratio Sensor - Upstream
$299.92
$117.44
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Vehicle Fitment Notes:
B1S1 OE Equivalent Design
B1S1 OE Equivalent Design
Air / Fuel Ratio Sensor - Upstream Left
$299.92
$117.44
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
OE Equivalent Design
OE Equivalent Design
Air / Fuel Ratio Sensor - Upstream Right
$299.92
$117.44
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
OE Equivalent Design
OE Equivalent Design
Air / Fuel Ratio Sensor - Upstream
$299.92
$124.73
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Aspiration: Naturally Aspirated; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Aspiration: Naturally Aspirated; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Vehicle Fitment Notes:
B1S1 OE Equivalent Design
B1S1 OE Equivalent Design
Air / Fuel Ratio Sensor - Upstream
$84.86
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Vehicle Fitment Notes:
B1S1 OE MFR: NTK
B1S1 OE MFR: NTK
Air / Fuel Ratio Sensor - Upstream
$210.00
$126.74
In Stock
Ships: Next Business Day
Pick-Up: Next Business Day
Pick-Up: Next Business Day
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Air / Fuel Ratio Sensor - Upstream
$210.00
$126.74
In Stock
Ships: Next Business Day
Pick-Up: Next Business Day
Pick-Up: Next Business Day
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Air / Fuel Ratio Sensor - Upstream
$406.76
$130.47
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Air / Fuel Ratio Sensor - Upstream
$161.63
$112.30
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Germany
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Air / Fuel Ratio Sensor - Upstream
$161.63
$112.30
Out of Stock
Condition: New
Required Per Vehicle: 2
Required Per Vehicle: 2
Made in Germany
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Oxygen Sensor - Downstream
$84.26
Limited Stock
Ships: Same or Next Business Day
Pick-Up: Same Business Day (Order before 12pm)
Pick-Up: Same Business Day (Order before 12pm)
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Oxygen Sensor - Downstream
$84.26
Limited Stock
Ships: Same or Next Business Day
Pick-Up: Same Business Day (Order before 12pm)
Pick-Up: Same Business Day (Order before 12pm)
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Oxygen Sensor - Downstream
$84.26
Limited Stock
Ships: Same or Next Business Day
Pick-Up: Same Business Day (Order before 12pm)
Pick-Up: Same Business Day (Order before 12pm)
Condition: New
Required Per Vehicle: 2
Required Per Vehicle: 2
Made in USA
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Oxygen Sensor - Upstream
$124.84
Limited Stock
Ships: in 3-4 Business Days
Pick-Up: in 3-4 Business Days
Pick-Up: in 3-4 Business Days
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Oxygen Sensor - Upstream
$160.72
$106.60
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Oxygen Sensor - Upstream
$160.72
$106.60
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Oxygen Sensor - Downstream Left
$55.89
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
OE MFR: NTK
OE MFR: NTK
Oxygen Sensor - Downstream Right
$55.89
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
OE MFR: NTK
OE MFR: NTK
Oxygen Sensor - Downstream
$71.12
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Aspiration: Naturally Aspirated; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Aspiration: Naturally Aspirated; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Vehicle Fitment Notes:
B1S2 OE MFR: NTK
B1S2 OE MFR: NTK
Oxygen Sensor - Downstream
$55.17
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Vehicle Fitment Notes:
B1S2 OE MFR: NTK
B1S2 OE MFR: NTK
Oxygen Sensor - Downstream
$124.80
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Aspiration: Turbocharged; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Aspiration: Turbocharged; Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Vehicle Fitment Notes:
B1S2 OE Equivalent Design
B1S2 OE Equivalent Design
Oxygen Sensor - Downstream
$124.80
10+ In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in Japan
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Vehicle Fitment Notes:
B1S2 OE Equivalent Design
B1S2 OE Equivalent Design
Oxygen Sensor - Downstream
$101.73
$61.84
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Oxygen Sensor - Downstream
$101.73
$61.84
In Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Pick-Up: Ready in 1 Hour Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Oxygen Sensor - Downstream
$109.12
Limited Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Oxygen Sensor - Downstream
$109.12
Limited Stock
Ships: Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Pick-Up: Ready in 2-3 Hours Monday Sep. 22nd
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Oxygen Sensor - Downstream
$93.40
Limited Stock
Ships: Same or Next Business Day
Pick-Up: Same Business Day (Order before 12pm)
Pick-Up: Same Business Day (Order before 12pm)
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Engine Base: 1.5L 1499cc 91ci L4 (3.11x3.01; 79.0x76.4);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Oxygen Sensor - Downstream
$93.40
Limited Stock
Ships: Same or Next Business Day
Pick-Up: Same Business Day (Order before 12pm)
Pick-Up: Same Business Day (Order before 12pm)
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor
Oxygen Sensor - Upstream
$177.85
$113.96
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: GAS;
Oxygen Sensor - Upstream
$177.85
$113.96
Out of Stock
Condition: New
Required Per Vehicle: 2
Required Per Vehicle: 2
Made in USA
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Oxygen Sensor - Downstream
$94.13
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Oxygen Sensor - Downstream
$94.13
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Oxygen Sensor - Downstream
$84.92
Out of Stock
Condition: New
Required Per Vehicle: 2
Required Per Vehicle: 2
Made in USA
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Oxygen Sensor - Rear
Call for Pricing
Call For Availability
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1);
Oxygen Sensor - Upstream
$128.98
Call For Availability
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: FULL HYBRID EV-GAS (FHEV);
Vehicle Fitment Notes:
Bank 1 Sensor 1 w/ 5 Wires
Bank 1 Sensor 1 w/ 5 Wires
Oxygen Sensor - Upstream
$128.98
Call For Availability
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Engine Base: 2.0L 1999cc 122ci L4 (3.44x3.27; 87.5x83.1); Fuel Type: PLUG-IN HYBRID EV-GAS (PHEV);
Vehicle Fitment Notes:
Bank 1 Sensor 1 w/ 5 Wires
Bank 1 Sensor 1 w/ 5 Wires
Oxygen Sensor - Upstream
$208.62
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Engine Base: 2.5L 2488cc 152ci L4 (3.50x3.94; 88.9x100.1);
Oxygen Sensor - Downstream
$71.39
$45.00
Out of Stock
Condition: New
Required Per Vehicle: 2
Required Per Vehicle: 2
Made in USA
Vehicle fitment:
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Engine Base: 2.7L 164ci V6 (3.27x3.27; 83.1x83.1);
Vehicle Fitment Notes:
O.E. Quality Direct Fit Replacement Sensor
O.E. Quality Direct Fit Replacement Sensor