Is it dangerous to keep driving with a faulty oxygen sensor?

Not critical for safety, but ignoring it long-term can cause an overly rich mixture that damages the catalytic converter, turning a relatively cheap sensor fix into a much more expensive repair — address promptly.

How many oxygen sensors does a typical car have?

Usually two or more — at least one before the catalytic converter (monitoring engine output) and one after (monitoring catalyst efficiency).

What is the sensor made of?

A ceramic sensing element in a metal housing, with a heated element to reach operating temperature quickly.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Oxygen Sensor

Name: Oxygen Sensor
Brand: Other used and new parts
SKU: NTK OZA401-E6 96335925 25164596
Price: 25.20 EUR
Availability: InStock

OEM: NTK OZA401-E6 96335925 25164596

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The oxygen sensor (lambda sensor) measures the oxygen content in exhaust gas, letting the ECU fine-tune the air-fuel mixture for efficient combustion and emissions control.

Ask a question

Not sure about compatibility? Send us your car's VIN and we'll confirm.

Ask about this product

Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Poor fuel economy
Check Engine light with an oxygen sensor fault code
Rough idle or hesitation
Failed emissions test

Installation information

Screws into the exhaust manifold or pipe — always use anti-seize compound on the threads (avoiding the sensor tip) to prevent seizing for future replacement.

Donor vehicle description

1960 parts from this car

Frequently asked questions

The ECU relies on this sensor’s reading to fine-tune the fuel mixture — an inaccurate reading can cause the engine to run richer (using more fuel) than necessary to compensate for uncertainty.

What our customers say

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Price: affordable. Service: electrical equipment repair.
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Andris B.
September 2026
Price: excellent.
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Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
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Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
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Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
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Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
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Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
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Front fender
October 2025