Let's talk about the KEYOPO Engine Speed Sensor 4327233. I installed this on my Cummins ISB engine, and here's the real deal.

The good? It's compact, lightweight, and snaps into place easily. The responsiveness is decent when it works – my tachometer readings were smooth during testing.

But here's the kicker – quality control seems shaky. Like another reviewer, I got two sensors: one worked perfectly, the other was DOA right out of the box. Nothing more frustrating than mid-installation surprises!

When it works, it's a budget-friendly alternative to OEM parts. The 6-month warranty is nice, but who wants to deal with replacements?

Pro tip: Test immediately upon arrival. These sensors either work flawlessly or fail spectacularly – no in-between.