Bosch 0258017025 LSU4.9 Wideband O2 (UEGO) Oxygen Sensor – for PLX / AEM

High-quality replacement Bosch LSU 4.9 wideband oxygen (lambda) sensor for many UEGO / AFR wideband controllers and gauges.

Package contents

• 1 × Bosch 0258017025 (LSU 4.9) wideband oxygen sensor

Overview

The LSU 4.9 wideband (UEGO) oxygen sensor measures the amount of oxygen in the exhaust stream and provides the precise feedback required by wideband AFR controllers. Accurate air/fuel ratio data helps improve engine performance, fuel economy and reduces harmful emissions – extending the life of your catalytic converter.

Features/Benefits

• Genuine-style Bosch LSU 4.9 wideband element
• Designed for use with wideband UEGO controllers and AFR gauges
• Improves combustion tuning and engine efficiency
• Helps reduce CO2 and other emissions
• Durable construction for long service life

Replaces / For

Replaces the following OEM / part numbers (examples):

• Bosch: 0258017025, 17025
• Other referencing numbers: 304110, 300300, 300310

Commonly used with AEM / PLX wideband controllers and gauges (examples – always verify compatibility):

• AEM 30-4110 Digital Wideband UEGO Gauge
• AEM 30-0300 X Series Digital Wideband UEGO AFR Gauge
• AEM 30-0310 X Series Inline Wideband UEGO AFR Controller
  (If your listing references a different AEM/PLX model number such as 30-2004, please double-check fitment against the sensor OE/connector.)

Fitment & Important Notes

• Always compare your original sensor to the product images and OE number before purchasing.
• Confirm the connector, thread, and overall shape match your original part.
• This listing includes only the sensor shown in the photos – any additional items or wiring harnesses are not included unless explicitly stated.

Ordering

• Need more than one? Increase the quantity next to the “Buy It Now” button before checkout.

Shipping & Processing

• Orders are typically processed and shipped within 24-48 hours after payment is verified.
• Items ship from our CA / NJ / KY warehouses.
• Orders are not processed on holidays.

Payment

• Please complete payment through the platform checkout. Orders are usually shipped the same or next business day after payment clears.

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