LAMBDA SENSOR BOSCH LSU 4.9 LONG WIRE

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The Bosch LSU 4.9 wideband lambda sensor (part number 258017025) is the go-to solution when you need precise air-fuel ratio readings for serious tuning or motorsport use. This is not your average narrowband O2 sensor — it reads across a broad lambda range (from around 0.65 all the way to free air), giving you accurate data you can actually trust when dialing in your setup. It runs a monotonic output signal that works perfectly in closed-loop systems, and comes with a built-in trimming resistor f