Hero Genuine RR Unit / Regulator Rectifier for HF Deluxe, Passion Pro, Splendor NXG, Splendor Plus & iSmart - 31600KWA831S

Hero Genuine RR Unit / Regulator Rectifier - 31600KWA831S

Hero Genuine 31600KWA831S is the OEM RR unit / regulator rectifier used on select Hero commuter motorcycles including HF Deluxe, Passion Pro, Splendor NXG, Splendor Plus and Splendor iSmart applications. Buyers also search for this part as RR unit, reg rec, regulator rectifier, battery charging unit, or charging rectifier. This component converts AC current from the stator into usable DC current and helps control charging voltage so the battery and electrical system work properly.

If a bike is showing weak charging, battery drain, repeated bulb failure, erratic electrical performance, or overcharging symptoms, the regulator rectifier is one of the first parts that needs to be checked. Replacing a failed RR unit with the correct genuine Hero part helps restore reliable charging and avoids the poor fit, unstable output, and short life often seen with low-quality aftermarket electrical parts.

Hero’s public product listing for 31600KWA831S directly markets this part as a genuine RR unit / regulator rectifier and states compatibility with HF Deluxe, Passion Pro, Splendor NXG, Splendor Plus, and iSmart. Supporting dealer references expand the visible model list to include multiple year-coded variants such as HF Deluxe Black, HF Deluxe Eco, Passion Pro, Passion Pro TR, Splendor NXG and Splendor iSmart. Because Hero commuter models changed across years and wiring layouts, buyers should still match the old part number and connector pattern before ordering.

What This Product Is

• RR unit
• Regulator rectifier
• Reg rec
• Battery charging unit
• Charging rectifier for Hero motorcycles
• Genuine OEM Hero electrical charging component

Verified Compatibility

• Hero HF Deluxe
• Hero Passion Pro
• Hero Splendor NXG
• Hero Splendor Plus
• Hero Splendor iSmart

Supporting seller-level public fitment references also show:

• HF Deluxe Black (Sep 2014 / May 2015)
• HF Deluxe Eco (Nov 2013)
• HF Deluxe formerly CD Deluxe (Mar 2010)
• Passion Pro (Mar 2010 / May 2012 / Jan 2014)
• Passion Pro Special Edition (Oct 2010)
• Passion Pro TR (Aug 2014)
• Splendor NXG (Mar 2010 / Apr 2012)
• Splendor iSmart (Dec 2013 / May 2014)

Important Fitment / Compatibility Note

This is an electrical fitment-sensitive part. Please do not order only by bike name. Match the existing part number, coupler type, pin layout, mounting pattern, and wiring side before purchase. Some Hero commuter models look similar externally but use different RR units across years and electrical revisions.

Why Buyers Need It

• Restores correct battery charging when the old RR unit fails
• Helps protect the battery and electrical system from unstable voltage
• Useful when the bike is not charging properly or is overcharging
• Important for consistent headlight, indicator, horn, and self-start electrical performance
• Safer long-term choice than uncertain low-grade aftermarket electrical parts

Key Features

• Genuine Hero OEM part
• Part number: 31600KWA831S
• Regulates and rectifies charging output from the stator
• Supports stable DC output for battery charging and electrical reliability
• Built for direct replacement on supported Hero applications
• Single unit supply
• Public Hero marketplace MRP: ₹1,220

Common Symptoms / Replacement Reasons

• Battery not charging properly
• Battery drains repeatedly even after charging
• Overcharging or battery boiling issues
• Headlight or indicators fluctuate with RPM
• Frequent bulb failure due to unstable voltage
• Weak or inconsistent electrical performance
• Bike starts only after external charging but discharge returns quickly

Why Genuine Matters

The regulator rectifier is a critical electrical protection and charging component. Poor-quality copies may physically fit but can still deliver unstable charging output, shorten battery life, damage bulbs, or create repeat electrical complaints. A genuine Hero RR unit is the safer choice when you want proper connector fit, correct charging behaviour, and long-term reliability on the original wiring system.

Fitment / Return Prevention Note

Please verify all of the following before ordering: old part number, coupler style, number of pins, mounting bracket shape, and exact bike model/year. This product is not a universal RR unit. If your motorcycle has had wiring modification or local electrical conversion work, match the removed part first.

What's in the Box

• 1 x Hero Genuine Regulator Rectifier / RR Unit - 31600KWA831S

Technical Details

• Brand: Hero Genuine Parts
• Part Number: 31600KWA831S
• Product Name: REG. RECT. COMP. / RR Unit / Regulator Rectifier
• Category: Electrical / Charging System
• Net Quantity: 1 Unit
• MRP seen on public Hero marketplace: ₹1,220
• Manufacturer: Hero MotoCorp
• Country of Origin: India

FAQs

Q1. What does this RR unit do?
It converts AC current from the stator into DC current and regulates voltage so the battery charges properly and the electrical system stays stable.

Q2. Is 31600KWA831S a genuine Hero part?
Yes. This part is publicly listed and sold as a Hero Genuine RR unit / regulator rectifier.

Q3. Which bikes does this fit?
Hero’s public listing supports HF Deluxe, Passion Pro, Splendor NXG, Splendor Plus and Splendor iSmart. Seller references also show several year-coded variants within these families.

Q4. Will it fit every Splendor model?
No. Do not assume universal Splendor fitment. Match part number and coupler pattern before ordering.

Q5. What are common signs of a bad regulator rectifier?
Common signs include battery not charging, repeated battery discharge, voltage fluctuation, frequent bulb failure, and unstable electrical output.

Q6. Can I use a local aftermarket RR unit instead?
Many local electrical parts work inconsistently. For a charging-system part, genuine fit and voltage control matter a lot, so OEM is usually the safer choice.