AEM Bosch LSU 4.9 Replacement O2 Sensor for AEM Wideband Gauges & Controllers

Why is the 4.9 LSU Bosch o2 sensor such a popular wideband oxygen sensor for motorsports? During the extreme conditions high performance engines see the 4.9 lsu wideband o2 sensor provides accurate ultra fast Lambda or AFR readings. The sensor it’s self will not last forever in a high power engine and much like spark plugs the o2 sensor is something that should be checked and replaced at regular service intervals. Make sure that you know your wideband o2 sensor is in good shape and reading those air fuel ratios with the precision your engine demands with a new Bosch 4.9 LSU Wideband UEGO O2 replacement sensor AEM part no. (30-2004).

This Bosch 4.9 LSU Wideband UEGO O2 replacement sensor kit includes only the sensor (with attached cable and male connector) and is intended to replace an existing mounted wideband sensor used with AEM wideband air/fuel UEGO controllers.

These sensors have a laser-etched, calibrated resistor in the sensor’s connector body. This resistor is specifically created for the exact sensor that it is attached to. Modifying this will invalidate the sensor’s output. The wideband sensor is laboratory-calibrated at the Bosch factory, accurate to 0.1 AFR and never requires free-air calibration when used with an AEM wideband AFR controller.

• Accurate to 0.1 AFR
• Never requires free-air calibration when used with an AEM Controller and connector plug.
• Specifically designed for use with AEM Wideband UEGO controller Part Number 30-4110
• Replacement sensor only

Replacement Sensor for the following AEM Wideband Controllers:

• 30-4110 – Digital Wideband UEGO Gauge
• 30-0300 – X-Series Digital Wideband UEGO AFR Gauge
• 30-0310 – X-Series Inline Wideband UEGO AFR Controller

This is a VERY common sensor for many other aftermarket AFR gauges and o2 controllers. Please have look at the pictures of the connector above if you have any doubts about fitment. We keep this sensor in stock and ready to ship as we know how important it is to have a good o2 sensor while tuning any engine.

**We also stock the Bosch 4.2 LSU o2 sensors OEM replacement for AEM infinity ECU’s and older AFR gauges.**