The Wacker Neuson 5100021121 is a genuine OEM Left Rear Door designed for the G-Series portable generator lineup, covering G70, G95, G100, G110, G120, G130, and G150 models across standard, cold weather, and custom configurations. As a direct OEM replacement sourced through the Wacker Neuson parts program, this door matches the original panel for material, hardware mounting points, and enclosure geometry — no adaptation needed to achieve a correct, secure fit. This part covers an extensive range of G-Series build variants, including Tier 3, Tier 4, and Tier 4i emission configurations, making it the right choice whether you are servicing a skid-mounted unit, a mobile generator, or a cold weather-equipped machine. Confirm your machine number against the fitment list to select the correct panel for your specific configuration.
Key Features
- Genuine OEM Panel Construction — Manufactured to the same material grade and dimensional spec as the original enclosure door, ensuring consistent weatherproofing and structural integrity around the generator housing.
- Direct Bolt-On Replacement — Hinge points, latch hardware positions, and panel dimensions match the original mounting locations on G-Series generator enclosures for a straightforward swap.
- Broad G-Series Coverage — Fits G70, G95, G100, G110, G120, G130, and G150 generators across standard, cold weather, custom, and switchable 600V configurations in Tier 3, T4, and T4i variants.
- Enclosure Integrity Restored — A damaged or missing rear door exposes internal generator components to weather, debris, and jobsite contamination; replacing it promptly protects the alternator, engine, and control systems.
- Access Panel Functionality — Restores correct rear-access operation, allowing technicians to reach internal service points safely with the panel properly latched during operation.
The left rear door is a structural panel that forms part of the weather-protective enclosure surrounding the generator's engine and alternator assembly. Its primary role is to shield internal components from rain, dust, and debris while the unit is running or stored, and to provide controlled rear access for servicing. When this door is damaged, missing, or no longer seals correctly, moisture and contaminants can reach sensitive electrical and mechanical components, accelerating wear and increasing the risk of faults. Replacing a compromised door with a correct OEM panel restores the enclosure's designed level of protection and keeps the generator operating within its intended environmental tolerances.
Part Details
| Part Number | 5100021121 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Left Rear Door |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G120-GENERATOR, SKID, CUSTOM, DEERE T3 | G120 | 5000620654, 5000620653, 5000620652, 5200003159, 5200003856, 5200003854, 5200003855, 5200014467, 5200014468, 5000620311, 5200014466, 5000620309, 5000620310, 5200008351, 5200008350, 5200008349, 5200001320 |
| G100-GENERATOR, SKID, CUSTOM, DEERE T3 | G100 | 5000620651, 5000620650, 5000620649, 5200003158, 5200003859, 5200003858, 5200003857, 5100045086, 5000620314, 5100045498, 5000620312, 5000620313, 5200008346, 5100045499, 5100045555, 5100045554, 5100045553, 5200008347, 5100033310, 5200008345, 5100049835, 5100049836, 5100033311, 5100033312, 5100026957, 5100026959, 5100026958 |
| G150 Generator, Standard T4i | G150 | 5200023235, 5200023236, 5200023237, 5100045088, 5100045570, 5100045571, 5100049842, 5100049841 |
| G130 Generator, Cold Weather T4 | G130 | 5200023233, 5200023232, 5200023234, 5100045559, 5100045087, 5100045560, 5100045564, 5100045566, 5100045565, 5100049838, 5100049839 |
| G70 Generator, Cold Weather T4F | G70 | 5200023227, 5200023226, 5200023228, 5100042498, 5100042500, 5100042497, 5100042496 |
| Mobile Generator | G95 | 5200020677, 5200016642, 5100029186 |
| G110 Generator, Brazil, Premium | G110 | 5100022043, 5100022042 |
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.
