The Wacker Neuson 5100021135 Left Rear Door is a genuine OEM enclosure panel designed for the G25 portable generator series. This door serves as a direct replacement for standard, cold weather, extended run, custom, and 600V switchable variants across Tier 4 Interim and Tier 4 Final configurations. As a factory-sourced component, the 5100021135 matches the original in dimensions, hardware mounting points, and finish — ensuring a proper fit without rework or modification. Compatibility also extends to select G20 mobile generator configurations, making this a widely applicable service part across the Wacker Neuson generator lineup.
Key Features
- Genuine OEM Enclosure Integrity — Factory-sourced panel that maintains the same structural tolerances and weather-resistant finish as the original door, protecting internal generator components from dust, debris, and moisture ingress.
- Drop-In Panel Replacement — Matches the original hinge points, latch hardware, and panel dimensions of the G25 enclosure, allowing technicians to swap the door without drilling, fabricating, or sourcing additional hardware.
- Broad G25 Series Coverage — Fits a wide range of G25 configurations including standard, cold weather, extended run, custom, battlefield, 600V switchable, mobile, and skid-mounted variants across T4i and T4F emission tiers.
- Protects Critical Generator Components — A properly sealing rear door is essential for keeping the alternator, control panel wiring, and fuel system shielded from jobsite contaminants; a damaged or missing door can accelerate wear on internal components and compromise generator output.
- Verified Part Number Fitment — The 5100021135 is the correct OEM-specified part number for this position on the G25 enclosure, giving parts managers and field technicians confidence when ordering for fleet service.
The left rear door is a structural panel that forms part of the protective enclosure surrounding the G25 generator's internal components. Its primary role is to seal the rear-left section of the canopy against the elements, preventing rain, dust, and debris from reaching sensitive electrical and mechanical systems during operation or transport. When this door is damaged, missing, or fails to latch correctly, it can expose alternator windings, control wiring, and fuel system components to contamination — increasing the risk of faults and shortening service intervals. Keeping this panel in good condition is a straightforward but important part of routine generator maintenance.
Part Details
| Part Number | 5100021135 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Left Rear Door |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G25 GENERATOR, EXTENDED RUN TANK, SKID | G25 | 5000620709, 5000620640, 5000620641, 5200005557, 5000620931, 5200009372, 5200009376, 5200009371, 5200009370, 5200009373, 5200014462, 5200014460, 5100045084, 5100041580, 5100041592, 5100041581, 5100050326, 5100041583, 5100041582, 5100045541, 5100045542, 5100042507, 5100042510, 5100042508 |
| Mobile Generator | G20 | 5200016628, 5200022625 |
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.
