AEM LSU 4.2 Wideband Sensor with Calibrated Resistor for Accurate AFR

AEM LSU 4.2 Wideband Sensor with Calibrated Resistor Brand: AEM The AEM LSU 4.2 Wideband Sensor delivers precision air-fuel ratio (AFR) measurements for tuning, performance, and emissions control. Each sensor includes a laser-etched, calibrated resistor in the connector body matched to that specific unit for reliable, repeatable readings. Key Features Factory Calibrated: Laboratory-calibrated at the Bosch factory for high accuracy. Precision: Accurate to ±0.1 AFR when used with an AEM wideband AFR controller. Matched Resistor: Integrated, laser-etched resistor tuned to the individual sensor — do not modify or replace. No Free-Air Calibration Needed: Works out-of-the-box with AEM controllers, saving time and ensuring consistent performance. Durable Construction: Built for automotive environments with proven Bosch sensor technology. Why Choose the AEM LSU 4.2 Whether tuning on the dyno or monitoring AFR on the street or track, the AEM LSU 4.2 provides dependable, high-resolution data critical for engine safety and performance. Its matched resistor and factory calibration eliminate guesswork and maintain accuracy throughout service life. Compatible with AEM wideband controllers only. Modifying the calibrated resistor will invalidate sensor output.