Unitronic Wideband Conversion Harness

Marsoni

M251S

$109.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Unitronic Wideband Conversion HarnessUnitronic is pleased to present it's plug and play Wideband ECU Conversion Harness. Designed to easily convert your vehicle's wiring harness to accept a wideband oxygen sensor and Bosch 1. 8T Wideband ECU. Narrowband ECU's do not have the ability to provide dynamic lambda control, therefore, many tuners, including Unitronic, require converting to a wideband ECU for a better tuning experience and overall improved drive ability. Including complete

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Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
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This engine air filter was a perfect fit for our 2021 Honda Odyssey Elite. Installation was quick and easy, popped right into place with no issues at all. The build quality looks great, and it feels just as solid as the factory filter it replaced. It’s always nice to find a reliable replacement part that fits exactly as it should. We drive a lot of gravel as well and this has held up well to those elements. Great value compared to dealership pricing. Will definitely purchase again when it’s time for the next replacement.

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Reviewed in the United States on February 19, 2026

Verified Purchase

StandUpToTyranny

Cuba, US

★★★★★ 5

Great quality and cost effective!

Color: CA12061

My mechanic says this is a great filter. They installed free (30 seconds) whereas Honda wanted $150 plus labor is it to install theirs. 🙄

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on January 29, 2026