Technical Specifications: Brand: AEM Performance Electronics Part Number (MPN): 30-2001 Product Type: Replacement Bosch LSU 4.2 Wideband UEGO Oxygen Sensor Calibration: Factory Laser-Trimmed Resistor (Located inside the connector body) Compatibility: Strictly designed as a replacement sensor for AEM legacy wideband controllers utilizing the LSU 4.2 architecture (e.g., older 30-4100 gauges, 30-2310 Inline controllers, Infinity EMS with 4.2 harnesses). Note: NOT compatible with newer AEM X-Series gauges requiring the LSU 4.9 sensor. Performance & Fitment Features: Plug-and-Play Accuracy: Laboratory-calibrated at the Bosch factory. Accurate to 0.1 AFR and never requires complex free-air calibration when used with a compatible AEM controller. CRITICAL INSTALLATION WARNING (DO NOT CUT WIRES): The electrical connector contains a precision laser-etched calibration resistor specific to that individual sensor. Under no circumstances should you cut, splice, or modify the sensor wires or connector. Doing so instantly destroys the calibration, renders the sensor completely useless, and permanently voids the manufacturer's warranty. Consumable Component Notice: Wideband oxygen sensors are highly sensitive consumable items. Exposure to leaded racing fuels, two-stroke oil, excessive exhaust temperatures, or thermal shock from water condensation (due to improper bung placement below the 10-degree angle) will drastically reduce the sensor's lifespan and cause premature failure. Federal Emissions Compliance: Holley Emissions Code: 5 Status: This part is a replacement diagnostic monitoring sensor that does not alter factory emissions control equipment. It is strictly legal for sale, installation, and street use in all 50 US states, including California. No CARB Executive Order (EO) is required. Disclaimer & Warranty Information: Onyx Customs FL acts exclusively as an authorized retailer of high-performance automotive electronics. We do not manufacture this product. STRICT RETURN & WARRANTY POLICY: Due to the highly sensitive electrical nature of wideband sensors, Onyx Customs FL will not accept returns or exchanges for any sensor that has been installed, threaded into an exhaust, or modified. Sensor failure due to lead poisoning, carbon fouling, thermal shock, or wire modification is strictly the responsibility of the end user. All manufacturing defects and extremely limited warranty claims must be directed to AEM Performance Electronics.
