AEM · New
AEM Bosch LSU 4.9 UEGO Replacement Sensor
MPN 30-2004 · Store SKU aem30-2004
Supplier stock checked 11/7/2026, 1:59:46 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
AEM's Bosch 4.9LSU 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. Bosch LSU 4.9 Wideband UEGO Replacement Sensor for Part Numbers 30-4110, 30-0300, 30-0334, 30-0310 and 30-0310N Bosch LSU 4.9 Wideband UEGO inReplacement in Sensor for Part Number 30-4110 Only AEM Bosch Replacement UEGO Sensor Bosch LSU 4.9
Manufacturer fitment & guides
Check 30-2004 against the manufacturer’s application information below.
Part-specific notes
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
