Kubota WG1605, WG1903, WG2503 & WG3800 Oxygen (O2) Sensor | Genuine Kubota EG523-12240
This is a new, genuine Kubota oxygen sensor, part number EG523-12240. It fits Kubota WG series spark-ignition engines, which run on gasoline or LPG: the WG1605, WG1903, WG2503 and WG3800. It cross-references to Bosch 0258006956.
The engine controller uses the O2 signal to trim fuel. A slow or dead sensor sets O2 fault codes and can cause rich or lean running, rough idle, high fuel use and fouled plugs. Fix exhaust leaks ahead of the sensor first, since they give false lean readings.
Confirm Fitment Before You Order
Kubota WG engines come in gasoline and LPG builds. Send the engine model and serial number from the engine tag, plus the fault code if you have one, and we will confirm the sensor. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | EG523-12240 |
| Brand | Kubota |
| Condition | New, genuine, in original packaging |
| Type | Exhaust oxygen (O2) sensor |
| Engines | Kubota WG1605, WG1903, WG2503, WG3800 |
| Bosch cross-reference | 0258006956 |
| Price | $219.00 |
| Shipping weight | 1 lb |
Fits / Applications
- Kubota WG1605 engine
- Kubota WG1903 engine
- Kubota WG2503 engine
- Kubota WG3800 engine
Keep anti-seize and sealants off the sensor tip. Route the lead away from hot exhaust parts, clear codes after installing, and confirm the signal switches at operating temperature.
Part Numbers & Cross Reference
Bosch 0258006956
Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.
Why Buy From Valley Fuel Injection
We are an authorized Kubota dealer and a diesel fuel-injection shop in Woodland, CA, working on diesel engines since 1993. When you call, you talk to people who know Kubota engines, and we check the part number against your engine serial or machine model before anything ships, so the right part arrives the first time. See our Kubota engine sales, parts and service.
Ships UPS Ground anywhere in the lower 48. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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