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Voltage Regulator Rectifier for Polaris RZR Ranger Sportsman 4015816
Voltage Regulator Rectifier for Polaris RZR Ranger Sportsman 4015816
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Product Overview
Replace a damaged, overheated, or unstable voltage regulator rectifier with this 5-wire replacement unit, designed for select Polaris RZR, Ranger, and Sportsman applications using OEM reference numbers 4015816 and 4013978.
The voltage regulator rectifier is an important part of the charging system. It helps regulate and stabilize charging output before power reaches the battery and electrical components. A faulty regulator rectifier may cause weak charging, battery overcharging, repeated battery failure, dim lights, blown bulbs, unstable voltage, warning lights, or electrical system problems.
This replacement regulator rectifier is rated at 45A / 650W based on supplied product data and features a heavy-duty heat-sink body for charging system support. Please compare your original regulator’s OEM number, plug shape, wire count, pin layout, mounting hole distance, size, and charging system design before ordering.
Product Compatibility
| Make | Model / Platform | Year Range | OEM / Reference Number | Fitment Notes |
|---|---|---|---|---|
| Polaris | Ranger 900 XP | 2013–2015 | 4015816 / 4013978 | Main fitment; confirm original regulator and connector layout |
| Polaris | Ranger 900 Crew | 2013–2015 | 4015816 / 4013978 | Verify plug shape, wire count, and mounting hole distance |
| Polaris | RZR 1000 XP / RZR XP 1000 | 2014–2015 | 4015816 / 4013978 | Common related fitment; match by OEM and connector |
| Polaris | RZR 1000 XP Turbo / RZR XP Turbo | 2016 | 4015816 / 4013978 | Confirm regulator body size and plug layout before ordering |
| Polaris | RZR 900 / RZR 900 S | 2015 | 4015816 / 4013978 | Fits matching 5-wire regulator rectifier version only |
| Polaris | RZR 900 XP Turbo / RZR 4 900 XP Turbo | 2016 | 4015816 / 4013978 | Verify original part number and charging system |
| Polaris | Sportsman 450 | 2016–2018 | 4015816 / 4013978, verify original | Possible related fitment only if OEM and connector match |
| Polaris | Sportsman 570 | 2014–2018 | 4015816 / 4013978, verify original | Possible related fitment; compare plug, size, and mounting points |
| Polaris | Sportsman ETX | 2015 | Verify original | Check OEM number before ordering |
| Polaris | Sportsman X2 / SP 570 | 2015–2018 | Verify original | Match by OEM number, connector, and regulator dimensions |
Important Fitment Note:
This part is not selected by model name alone. Polaris RZR, Ranger, and Sportsman models may use different regulator rectifiers depending on year, engine size, trim, electrical system, production version, and wiring harness. Please confirm your original unit matches OEM 4015816 or 4013978, the 5-wire layout, 45A / 650W rating, 83mm mounting hole distance, and overall connector style before ordering.
Specifications
| Specification | Details |
| Product Type | Voltage Regulator Rectifier |
| Compatible Brand | Polaris |
| Wire Count | 5 Wire |
| Current Rating | 45A |
| Power Rating | 650W |
| Length | 112mm / 4.4" |
| Width | 106mm / 4.2" |
| Thickness | 50mm / 2.0" |
| Mounting Hole Distance | 83mm / 3.3" |
| Main OEM Reference | 4015816 |
| Cross Reference | 4013978 |
| Main Compatible Platforms | Polaris RZR, Ranger, Sportsman |
| Application | ATV / UTV Charging System |
| Fitment Type | Replacement, match by OEM number, connector, wire count, and size |
Key Features
- Designed for select Polaris RZR, Ranger, and Sportsman charging systems
- Replaces common Polaris voltage regulator references 4015816 and 4013978
- 5-wire regulator rectifier design for matching Polaris electrical systems
- Rated at 45A / 650W based on supplied product specifications
- Helps stabilize charging output and reduce voltage fluctuation
- Helps prevent overcharging, weak charging, battery drain, and unstable electrical output
- Heat-sink housing helps dissipate excess heat during operation
- Direct replacement style, but original OEM number, plug layout, wire count, and mounting distance must be checked before installation
OEM Cross Reference
| OEM / Reference Number | Notes |
| 4015816 | Main Polaris voltage regulator reference |
| 4013978 | Earlier / related Polaris voltage regulator reference replaced by 4015816 |
| 4016868 | Possible related Polaris regulator reference on some upgraded aftermarket listings; verify before purchase |
| 4014856 | Possible related RZR / Ranger regulator reference; verify before purchase |
Please use the OEM/reference number together with physical dimensions and connector layout for fitment confirmation. If your original regulator rectifier has a different wire count, plug shape, pin layout, mounting hole distance, body size, or charging system design, this part may not fit.
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Fitment FAQ
Will this part fit my specific model and year?
This regulator rectifier is designed for select Polaris RZR, Ranger, and Sportsman applications using OEM reference numbers 4015816 and 4013978. Common fitment includes Ranger 900 XP / Crew 2013–2015, RZR 1000 XP 2014–2015, RZR XP Turbo 2016, and RZR 900 applications when the original regulator matches. Please compare your original OEM number, plug shape, wire count, pin layout, body size, and mounting hole distance before ordering.
Do I need to match the OEM part number?
Yes, matching the OEM or reference number is strongly recommended. This regulator rectifier replaces Polaris 4015816 and 4013978. However, OEM number alone is not enough. Please also confirm the 5-wire layout, connector shape, pin arrangement, 83mm mounting hole distance, regulator body size, and charging system type.
What models or situations does this part not fit?
This part does not fit Polaris RZR, Ranger, Sportsman, General, ACE, Scrambler, or other Polaris models that use a different regulator body, different wire count, different connector shape, different pin layout, different mounting distance, or different charging system design. It is also not a replacement for the stator, battery, starter relay, fuse box, ignition coil, ECU, or complete wiring harness.
What should I check before ordering?
Before ordering, please check your vehicle make, model, year, trim version, OEM regulator number, plug shape, wire count, pin layout, mounting hole distance, body length, width, thickness, and charging system type. For best fitment, compare the product photos and specifications with your original regulator rectifier before purchase.