LSU 4.9 Wideband O2 Sensor – Key Features & Functions
Bosch LSU 4.9 Wideband Technology
Industry-standard accuracy:
- Precise lambda and AFR measurement
- Stable readings across RPM range
- Trusted by tuners worldwide
Because guessing AFR isn’t a strategy.
OE Reference Part Number: The LSU 4.9 Oxygen Sensor, often referred to as the Lambda Sensor, plays a vital role in monitoring the oxygen-to-fuel ratio to your vehicle. Our automotive replacement oxygen o2 sensor can replaces 17025, 0258017025, 300300, 300310, 304110, 234-5107. (Please check your vehicle information before purchasing.)
5-Wire Sensor Design
Advanced signal control:
- Dedicated circuits for heater and signal
- Improved response time
- Consistent and reliable data output
More control = more accurate readings.
Application: STZJAYE oxygen 02 sensors oem 17025, 300300, 300310, 304110 compatible with most 4.9 LSU Wideband Controller Gauge, for AEM 30-4110 Digital Wideband UEGO Gauge, for AEM 30-0300 X-Series Digital Wideband UEGO AFR Gauge, for AEM 30-0310 X-Series Inline Wideband UEGO AFR Controller.
Wide Compatibility with AEM UEGO Systems
Designed to work with:
- AEM 30-4110 UEGO
- AEM 30-0300 X-Series AFR
- AEM 30-0310 Inline Controller
Plug-and-play replacement for supported setups.
Replacement for AEM AFR Gauge Controller: The Stzjaye Air-Fuel Ratio (AFR) Lambda sensors can enhancing engine performance and fuel efficiency by minimizing the emission of CO2 and other harmful emissions, in the long run extending the lifespan of your catalytic converter.
Fast Response for Dynamic Conditions
Built for performance:
- Rapid AFR detection under throttle changes
- Ideal for turbo and high-performance builds
- Stable readings under boost
Because AFR changes fast—especially when things get spicy.
Easy Installation Oxygen Sensor: Manufactured to OE standard specification fit form and serve as. Our o2 sensor can right away replaces the old parts.
Durable High-Heat Construction
Exhaust-ready design:
- Heat-resistant materials
- Long service life
- Built for harsh environments
Because your exhaust isn’t exactly a calm place.
Tips on how to Replace the Oxygen Sensor? STEP1. Diagnostic trouble codes to spot the faulty sensor; STEP2. Disconnect the oxygen sensor; STEP3. Cast off the oxygen sensor; STEP4. Compare the faulty oxygen sensor with the replacement sensor; STEP5. Install the brand new sensor and connect the harness; Clear the codes then start the vehicle.
Why You Need This LSU 4.9 Wideband O2 Sensor
If you rely on a wideband system, this sensor is critical.
The LSU 4.9 Wideband O₂ Sensor gives you:
- Accurate AFR data for precise tuning
- Improved engine safety under boost and load
- Reliable compatibility with AEM UEGO systems
- Fast response for real-time adjustments
Because tuning without accurate AFR is how engines fail.
Ideal Applications
- Turbocharged builds
- Supercharged setups
- Standalone ECU tuning
- Wideband AFR monitoring systems
- Track and race cars
Final Verdict
The LSU 4.9 Wideband O₂ Sensor (17025 / 0258017025) is an essential replacement for maintaining accurate AFR data and reliable engine performance.
It’s precise, durable, and critical for any serious tuning setup.
Because your engine deserves better than guesswork.
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