Overview
The ZF 0659.055.294 CONTACT PIN is a precision-engineered electrical component specifically designed for the WG 65 Series transmission. This OEM genuine part serves as the critical conductive interface within the transmission’s internal wiring harness, ensuring reliable signal transmission between the electronic control unit and the valve body solenoids. The SKU 0659.055.294 is mounted directly into the TRANSMISSION HOUSING, where it maintains a secure electrical connection despite exposure to high-pressure transmission fluid and thermal cycling. Without this contact pin, the transmission’s shift logic cannot receive accurate data, leading to performance degradation.
Symptoms of Failure
- Erratic or delayed shifting — When the 0659.055.294 contact pin corrodes or fractures, the transmission control module receives intermittent signals, causing harsh or delayed gear engagement during acceleration.
- Transmission stuck in limp mode — A failed contact pin often triggers a permanent fault code, forcing the transmission into a safe-mode operation with only second or third gear available.
- Intermittent electrical faults — Drivers may notice the transmission randomly dropping gears or failing to respond to throttle input, particularly in wet conditions where moisture enters the housing.
- No communication with diagnostic tools — A completely open circuit at the contact pin prevents the ECU from communicating with scan tools, mimicking a dead control module.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0659.055.294 |
| Material | Brass with gold-plated contact surface |
| Overall Length | 28.5 mm |
| Pin Diameter | 4.2 mm |
| Weight | 6 grams |
| OEM Reference | ZF 0659.055.294 |
| Sealing Type | Integrated O-ring groove |
| Operating Temperature | -40°C to +150°C |
Compatibility
This genuine ZF contact pin is engineered for the WG 65 Series transmission family. Based on its design and connector geometry, the 0659.055.294 is compatible with the following ZF models: WG65, WG80, WG120, WG150, WG180, and WG200. It is also used in certain variants of the Ecolife and Ecomat series that share the same electrical interface architecture. Always verify the pin configuration against your transmission’s wiring diagram before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101101 | TRANSMISSION HOUSING | Encloses and protects internal transmission components |
| 0636011118 | HEXAGON SCREW | Secures housing and valve body assemblies |
| 4616301304 | HOUSING | Rear housing section for gear train support |
| 4616301309 | HOUSING | Front housing section with bearing seats |
| 0630361069 | SEALING CAP | Prevents fluid leakage from sensor ports |
| 0636011038 | HEXAGON SCREW | M8 fastener for oil pan attachment |
| 0636016015 | HEXAGON SCREW | M10 fastener for bell housing |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0634313118 | O-RING | Seals the contact pin bore against fluid ingress |
| 0636304019 | SCREW PLUG | Closes unused hydraulic test ports |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
