Delphi ES20120 rear oxygen sensor for the 1999-2001 Mazda Protege 4-cylinder 1.6L measures the oxygen in the exhaust and reports it to the engine computer. Delphi oxygen sensors, this one included, are built to Delphi's OE standards.
- Delphi planar technology covers older, conical design sensors
- Smart design that consolidates SKUs without using long wires
- Patented protective sensor coating helps prevent contamination
- Validated for all fuel types, including ethanol blends like E85
- Tested to 150,000 miles, plus 2,000 hours of severe thermal testing
Quick facts
- Part: Delphi ES20120 oxygen sensor
- Fits: 1999-2001 Mazda Protege 4-cylinder 1.6L
- Position: Rear
- Condition: New
A check engine light, rough running or poor fuel economy can mean this sensor is worn, though the catalytic converter or the front oxygen sensor can be behind the same signs, so find the cause before replacing anything.
Fits
It fits the 1999-2001 Mazda Protege 4-cylinder 1.6L, which takes a single rear sensor. This listing is one sensor.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 1
Build and materials
- Sensor design: Planar
- Condition: New
In the box
One oxygen sensor and one instruction sheet.
Interchange: 234-4751 · ZM02-18-861A9U · 138-759 · ZM02-18-861 · ZM02-18-861A
OS1816 · 13885 · 22510 · REA1632 · SG1062 · 25024363 · SU5251
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
OS1816, 13885, 234-4751, ZM02-18-861A9U, 138-759, ZM02-18-861, ZM02-18-861A, 22510, REA1632, SG1062, 25024363, SU5251
Frequently Asked Questions
Is the Delphi ES20120 the Protege oxygen sensor for the 1999-2001 Mazda Protege 4-cylinder 1.6L?
Yes. Delphi ES20120 is a rear oxygen sensor for the 1999-2001 Mazda Protege 4-cylinder 1.6L, and that engine takes one.
Does the ES20120 come with an instruction sheet?
Yes. The package holds one oxygen sensor and one instruction sheet.
Are Delphi O2 sensors like the ES20120 validated for E85?
Yes. Delphi ES20120 is validated for all fuel types, including ethanol blends like E85.
How can I tell if my rear oxygen sensor is going bad?
A dash warning light or noticeably rougher running can mean the sensor is worn. A shop can test its readings with the engine running.
How is the ES20120 oxygen sensor tested?
It is OE tested to 150,000 miles, plus 2,000 hours of severe thermal testing.
