Draper 12V Lambda Tester And Simulator | Etot

Draper 12V Lambda Tester And Simulator | Etot

Marsoni

M251S

$38.10

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

Draper 12V Lambda Tester And Simulator | EtotThis 12V oxygen sensor tester and simulator is designed for testing both Zirconia and Titania lambda oxygen sensors. It is suitable for testing 1 4 wire lambda oxygen sensors, both heated and unheated. The device can simulate rich and lean mixtures to monitor the ECU's response. An LED display shows the crossover signal from the sensor. A wire piercing clamp is included for the positive lead, allowing for quick connection checks and confirming wire

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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.
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This relay has experienced failure again after just a couple of months of use. It's not the mag coil that fails but rather the contacts are of such low quality that they corrode beyond their ability to conduct power, and fast. I have had to change two of these so far and am on the third one. The seller will ship replacements but who wants to keep replacing them? I have to travel in my RV with a spare. This relay has never been exposed to the elements. It's safely mounted inside a sealed bay. Be aware of any brands that look like this, they are all the same.

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Reviewed in the United States on November 15, 2025

Verified Purchase

Dave Kulina

Alexandria, US

★★★★★ 5

Works great

I added extra batteries to run a truck camper without killing my main battery and this works great. Simple to install and i have no had any problems in the pay few months and i use it every single day

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Reviewed in the United States on April 18, 2021