The Wacker Neuson Coolant Sensor Wiring Harness is a genuine OEM component designed for the G25 and G70 series portable generators. As a direct factory replacement, this harness ensures the coolant temperature sensor communicates accurately with the generator's control system across the full range of G25 and G70 configurations, including standard, cold weather, extended run, custom, and switchable 600-volt variants. Wacker Neuson sources and validates this part to match the original electrical specifications, so installation is straightforward and signal integrity is maintained from day one.
Key Features
- Correct Electrical Continuity — Genuine OEM construction ensures conductor gauge, connector pinout, and insulation rating match the original harness exactly, preserving accurate coolant temperature signal transmission.
- Direct Plug-In Replacement — OEM connectors seat into the factory harness routing and sensor ports without splicing or adapter work, keeping the installation clean and secure.
- Broad G25 and G70 Coverage — Fits a wide range of G25 and G70 generator configurations including T4i, T4F, Tier 3, cold weather, extended run tank, custom skid, and switchable 600-volt models.
- Protects Engine and Generator Output — A functioning harness allows the control system to monitor coolant temperature in real time; a damaged or corroded harness can cause false shutdowns or, worse, allow the engine to run unprotected against overheating.
- Critical Electrical Safety — On a generator powering job-critical loads, a faulty sensor harness introduces risk of undetected thermal events; replacing it with a genuine OEM part restores the monitoring circuit to its intended protection level.
The coolant sensor wiring harness carries the low-voltage signal from the engine's coolant temperature sensor to the generator's control board or protection relay. This signal tells the machine whether coolant temperature is within a safe operating range and triggers a shutdown if the engine starts to overheat. When the harness is damaged — through abrasion, heat exposure, or connector corrosion — the control system may receive no signal or an erratic one, leading to nuisance shutdowns, failure to shut down when it should, or diagnostic fault codes that make troubleshooting difficult. Replacing the harness with part number 5000177892 restores the integrity of that monitoring loop and keeps the generator's thermal protection working as designed.
Part Details
| Part Number | 5000177892 |
|---|---|
| Old Part Number | 0177892 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Coolant Sensor Wiring Harness |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G25 Generator, Custom T4i | G25 | 5000620642, 5000620709, 5000620641, 5000620931, 5200014461, 5200014462, 5000621005, 5200003991, 5100022834, 5100042510, 5100042512, 5100042509, 5100025836, 5100042508 |
| G70-GENERATOR, SKID, CUSTOM, DEERE T3 | G70 | 5000620648, 5000620647, 5000620711, 5000620646, 5200001318, 5200003220, 5200014464, 5200014465, 5200008344, 5200008342, 5200008343, 5200008339, 5200008341, 5200008340, 5100025814, 5100025838 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
