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Worcester Bosch Lambda Probe LSU 4.9 258017025

Worcester Bosch

Worcester Bosch Lambda Probe LSU 4.9 258017025

Lambda probe 258017025 for Worcester Bosch appliances, using the LSU 4.9 sensor type.

At a glance

  • Also known as 1200400
Manufacturer part no.
258017025
Showing prices

£117.40

£97.83 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch 258017025 lambda probe is an oxygen sensor used on Worcester Bosch appliances to monitor oxygen content in the flue gases. It uses the LSU 4.9 sensor type. The probe supplies the feedback signal used by the appliance's combustion control.

Before you order

  • Confirm the part number 258017025 matches the part you are replacing.
  • Check that the existing sensor is the LSU 4.9 type.
  • Refer to the appliance documentation to confirm the correct sensor for your model.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.

Worcester Bosch 258017025 Lambda Probe LSU 4.9