BOSCH LSU 4.9 Wideband Oxygen Sensor - 0 258 017 025
The BOSCH LSU 4.9 wideband lambda sensor with identifier 0 258 017 025 features an M18x1.5 thread and a 22 mm hex. It is a 5-wire sensor with 930°C operating temperature and 1000 mm cable length for wideband AFR/lambda measurement.
Net price: 92 €
Key Features & Benefits – BOSCH LSU 4.9 wideband lambda sensor
The BOSCH LSU 4.9 wideband lambda sensor provides real lambda feedback for air-fuel ratio (AFR) measurement. It is compatible with AEM UEGO-X and Innovate AFR gauges, plus MoTeC and other systems that use an LSU 4.9 sensor.
This is a 5-wire sensor with an M18x1.5 mounting thread and a 22 mm wrench size. It is not the same as an LSU 4.2 sensor because sensitivity and connector style differ, so match the connector and controller support before installation.
When is this useful?
When tuning with a programmable ECU or a wideband AFR gauge, the BOSCH LSU 4.9 wideband lambda sensor helps you track mixture changes consistently during cruise and under load, while the heated sensor design supports stable readings as the system reaches operating conditions.
Technical specs
- Identification part number: 0 258 017 025
- Sensor type: LSU 4.9 wideband lambda sensor
- Compatible systems:
• AEM UEGO-X
• Innovate AFR
• MoTeC and LSU 4.9 based systems - Operating temperature: 930°C
- Max temperature (short-term): 1030°C
- Max cable sleeve temperature: 250°C
- Weight: 120 g
- Number of wires: 5
- Connector: 2x3 U-profile connector
- Length: 1000 mm
- Thread: M18x1.5
- Wrench size: 22 mm
- Tightening torque: 40–60 Nm
- Distinction: not LSU 4.2, different sensitivity and connector
Selection & installation tips
- Controller support: confirm your ECU/gauge is configured for an LSU 4.9 sensor.
- Connector match: verify the 2x3 U-profile connector style on both sensor harness and controller side.
- Thread & access: match the bung thread (M18x1.5) and ensure access for a 22 mm hex.
- Cable routing: plan routing around the 1000 mm length and keep the loom away from heat sources.
- Torque & heat exposure: stay within 40–60 Nm and account for the 250°C cable sleeve limit.
Before fitting, self-verify thread and connector match, cable routing, and heat exposure, then compare your setup to the technical specs above to ensure the BOSCH LSU 4.9 wideband lambda sensor matches your application.
Net price: 92 €
