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Is your Smart Fortwo running rough or throwing a check engine light?
Probably time for a new oxygen sensor.
This Autotech upstream O2 sensor (part number 17444, also 17 444) is a direct fit for the 2008-2015 Smart Fortwo with the 1.0L engine.

It's the upstream sensor, so it goes before the catalytic converter.

It crosses over with a bunch of OEM numbers like 079 906 262 L and 079 906 262 A.

It's a direct replacement, so it plugs right in—no wire splicing or drama.

Comes with a 1-year warranty.

4.8 out of 5