Walker Products 250-25121 oxygen sensor for the 2017-2020 Fiat 124 Spider 4-cylinder 1.4L and other vehicles measures the oxygen in the exhaust gas to track combustion efficiency. Every part number is made for its specific application and fitment position, and it gives the diagnostic feedback the ECU needs.
- Determines the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency
- Oxygen readings help fine-tune the air-fuel mixture to support fuel economy
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-25121 oxygen sensor
- Fits: the 2017-2020 Fiat 124 Spider 4-cylinder 1.4L and other vehicles
- Position: Upstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or light the malfunction indicator light. Newer vehicles store fault codes in the ECU, and some of them relate to the sensor. These signs alone do not prove the sensor is the problem, since a damaged wiring harness or connector can cause them too.
Fits
This upstream oxygen sensor fits the 2017-2020 Fiat 124 Spider 4-cylinder 1.4L, the 2015-2019 Fiat 500 4-cylinder 1.4L and the 2015-2016 Dodge Dart 4-cylinder 1.4L. This listing is one sensor, and the engine takes one in the upstream position.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: 5-W wide-band
- Electrodes: gas-permeable platinum layer
- Condition: New
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right oxygen sensor for the 2015-2019 Fiat 500 4-cylinder 1.4L?
Yes. Walker Products 250-25121 fits the 2015-2019 Fiat 500 4-cylinder 1.4L as an upstream oxygen sensor, and the engine takes one.
Is this Walker Products oxygen sensor a wide-band type?
Yes. Walker Products 250-25121 is a 5-W wide-band oxygen sensor with an M18 - 1.5 thread size.
Is this oxygen sensor upstream or downstream?
Upstream. This sensor is listed for the upstream position, and the listing is a single sensor.
What can a worn oxygen sensor do to fuel use and warning lights?
A failed sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or light the malfunction indicator light. A shop can read the stored fault codes.
What protects the electrodes on this oxygen sensor from exhaust residue?
The electrodes are made of a gas-permeable platinum layer. A coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates.
