The Genie 1257779GT is a genuine OEM Exhaust Temperature Sensor built for TCD3.6 T4F engines across Genie SX and S telescopic boom lifts, Z and ZX articulating boom lifts, and GTH telehandlers. As a direct OEM replacement, this sensor is manufactured to the same specification as the original, ensuring accurate temperature readings and proper emissions system operation. Cross-reference part number 1257779GT against your machine's parts manual to confirm it is the correct sensor for your unit before ordering.
Key Features
- Genuine OEM Specification — Manufactured to Genie's original design requirements, ensuring dimensional conformity and correct electrical output for the TCD3.6 T4F engine platform.
- Direct Replacement Fit — Engineered to install in the original sensor location with no adaptation, maintaining the integrity of the exhaust sensing circuit.
- Broad Equipment Compatibility — Fits Genie SX and S series telescopic booms, Z and ZX articulating booms, and GTH telehandlers, making it a versatile stocking part for mixed Genie fleets.
- Accurate Exhaust Monitoring — A functioning exhaust temperature sensor keeps the engine management system properly informed, protecting against overtemperature conditions that can cause engine de-rating or shutdown.
An exhaust temperature sensor monitors the temperature of exhaust gases as they pass through the engine's aftertreatment system. On Tier 4 Final engines such as the TCD3.6 T4F, this data is fed continuously to the engine control module, which uses it to regulate aftertreatment regeneration cycles and protect critical components from heat damage. When the sensor fails or delivers an inaccurate reading, the engine management system can log fault codes, limit machine performance, or initiate a shutdown to prevent damage — taking the machine out of service until the fault is resolved. Replacing a faulty sensor with the correct OEM part restores accurate signal output and gets the machine back to full operation.
Part Details
| Part Number | 1257779GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Exhaust Temperature Sensor, TCD3.6 T4F |
Compatibility & Fitment
| Name | Models |
|---|---|
| GTH-844 | GTH-844 |
| GTH-1056 | GTH-1056 |
| GTH-1256 | GTH-1256 |
| GTH-1544 | GTH-1544 |
| GTH-3007 | GTH-3007 |
| S-65 XC | S-65 XC |
| S-85 XC | S-85 XC |
| SX-135 XC | SX-135 XC |
| SX-150 | SX-150 |
| SX-180 | SX-180 |
| Z-45 XC | Z-45 XC |
| Z-51/30J | Z-51/30J |
| Z-62/40 | Z-62/40 |
| Z-80/60 | Z-80/60 |
| ZX-135/70 | ZX-135/70 |
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.
