---
product_id: 58781872
title: "Kids Ride On Car 12V DIY Modified Harness Complete Set of Remote Control Circuit Borad Wires Switch Gearbox with Motors, Children Electric Ride On Car Accessories"
brand: "e fast"
price: "$165"
currency: NZD
in_stock: true
reviews_count: 7
category: "E Fast"
url: https://www.desertcart.nz/products/58781872-kids-ride-on-car-12v-diy-modified-harness-complete-set
store_origin: NZ
region: New Zealand
---

# 12V dual motor power boost 2.4G Bluetooth remote control DIY easy-install complete harness Kids Ride On Car 12V DIY Modified Harness Complete Set of Remote Control Circuit Borad Wires Switch Gearbox with Motors, Children Electric Ride On Car Accessories

**Brand:** e fast
**Price:** $165
**Availability:** ✅ In Stock

## Summary

> ⚡ Transform your kid’s ride-on into a turbocharged thrill machine!

## Quick Answers

- **What is this?** Kids Ride On Car 12V DIY Modified Harness Complete Set of Remote Control Circuit Borad Wires Switch Gearbox with Motors, Children Electric Ride On Car Accessories by e fast
- **How much does it cost?** $165 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/58781872-kids-ride-on-car-12v-diy-modified-harness-complete-set)

## Best For

- e fast enthusiasts

## Why This Product

- Trusted e fast brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-in-One DIY Kit:** Complete harness with circuit board, wires, switches & motors for effortless installation 🛠️
- • **Power Up Your Ride:** Upgrade from 6V to 12V for up to 4x speed and hill-climbing power ⚡
- • **Future-Proof Your Fun:** Modular design supports easy repairs and upgrades—keep the adventure rolling
- • **Seamless Remote Control:** 2.4G Bluetooth remote lets you steer and stop with precision 📡
- • **Kid-Tested, Parent-Approved:** Boosts speed up to 10mph while maintaining safety with overload protection

## Overview

This 12V DIY modified harness kit upgrades kids' electric ride-on cars with dual motors, a 2.4G Bluetooth remote control, and a complete set of accessories including circuit board, wires, switches, and gearboxes. Designed for easy installation and repair, it significantly boosts speed and power, delivering an exhilarating ride experience for children aged 0-10.

## Description

Kids Ride On Car 12V DIY Modified Harness Complete Set of Accessories

Review: Great value, easy install! - Saved me time setting all this up myself. Great value for what you get. I used this to upgrade my son's Huffy Mickey Roadster Racer from 6v single motor to 12v dual motor. I have not done much of this before, but everything was pretty straight forward. Most pieces seemed to be standard and fit right in place. Only parts I had to adjust were the shifter and pedal. Shifter just had to remove the mounting bracket from the switch, and the pedal switch housing was smaller than the original, so I just popped out the switch and used it in the original pedal housing. Unfortunately, I had to leave out the remote steering as the steering on the car was not the correct length to use with a motor. The steering motor did fit in place, so it is likely a standard size that would work in many other vehicles. I will likely look at it again when I have more time, and I am sure I can find a way to make it work. The biggest downside to this upgrade was leaving previous sound and lighting electronics unplugged as they are setup for 6v; however, I do plan to buy 12v to 6v step down so I can reconnect the lights and sounds. The results after install were astonishing. I have not actually verified speed, but before the upgrade on the very well used 6v battery this thing was going maybe 2.5mph at best. I can definitely say after the upgrade it is at least 8mph possibly closer to 10mph. When I sent my kid for the first test drive we were both astonished. I guess in theory it is to be expected, but wow, this thing flies! I do wish that it was able to have a low and high speed, which will be my next thing to try and figure out, as I have nieces and a nephew who I do not believe could handle the speed of this thing!
Review: Great value for what it is. - My son has the 6v Rollplay GMC Sierra Denali and it nearly matches my truck so he loves it. It’s a little too slow for him now and he has a 24v 4x4, but his brother is now almost ready for a ride on but isn’t tall enough to reach the pedal and doesn’t totally understand steering yet. I got this kit mostly to convert it to remote control, but it converting to 12v is a huge plus not only for speed, but for going up hills from a stop (a 6v is one wheel drive, so it would kick them sideways on acceleration from stop). Like others have said, it isn’t plug and play but great for the money. The wiring is thicker than the 6v wiring, but if I were building it myself, I would have used a thicker gauge. I ended up using both new motors and keeping the old one as a spare since they were marginally quieter then the existing one. I used the existing accelerator pedal since the new one didn’t fit nicely in the plastic. I drilled holes under the dash for the power button and shifter since the wiring wasn’t long enough to go up to the dash and I was time crunched and didn’t have time to nicely splice and heat shrink them. The steering motor didn’t physically fit in the location I needed it to, but looks quality enough. All in all a solid kit.

## Features

- Kids Ride On Car 12V DIY Modified Harness Complete Set of Accessories ( No Battery )
- Complete Set of Accessories : 2.4G Remete Control, Control Box ( Circuit Board ), Wires, Switch, Pedal, Overload Protector, 2 Pcs Gearboxes, Steering Motor
- 2.4G Bluetooth Remote Control
- Easy to Install Repair and Replace
- Only Battery Are Not Included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079X4F9DW |
| Best Sellers Rank | #607,451 in Toys & Games ( See Top 100 in Toys & Games ) #1,335 in Kids' Ride-On Replacement Parts |
| Customer Reviews | 4.1 4.1 out of 5 stars (296) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.3 ounces |
| Item model number | ZM-R-4WD |
| Manufacturer | E FAST |
| Manufacturer recommended age | 0 - 10 years |
| Product Dimensions | 3.94 x 3.15 x 3.54 inches |

## Images

![Kids Ride On Car 12V DIY Modified Harness Complete Set of Remote Control Circuit Borad Wires Switch Gearbox with Motors, Children Electric Ride On Car Accessories - Image 1](https://m.media-amazon.com/images/I/719g2hY992L.jpg)

## Questions & Answers

**Q: So when the remote is in use, the child cannot control it right? But when the remote is not in use, the child can, correct? Or how does that work?**
A: The remote will try to override the control command to the car, but if you are trying to go forward and they put it in reverse the commands will cancel and the car won't move.  The only true overrides are limiting the top speed and putting it in 'park brake' mode where it will not move.  Your kid can be driving and you can try to steer to have them avoid an obstacle, however if they can overpower the little steering motor then you will not be able to control it.

**Q: How do i get the controller to streer? The steering motor works if i apply power but not with the controller. All other controlls work great.**
A: You may need to sync up the remote by holding the center button.

**Q: How much weight can this kit handle?**
A: I guess it would depend on the size of the car. the gears seem to be of good quality and may handle be bigger load. You may want to pare up the batteries.

**Q: Could this work with a 6v battery?**
A: I have used it for 6, 12 and 18v with no issues.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value, easy install!
*by R***N on January 10, 2020*

Saved me time setting all this up myself. Great value for what you get. I used this to upgrade my son's Huffy Mickey Roadster Racer from 6v single motor to 12v dual motor. I have not done much of this before, but everything was pretty straight forward. Most pieces seemed to be standard and fit right in place. Only parts I had to adjust were the shifter and pedal. Shifter just had to remove the mounting bracket from the switch, and the pedal switch housing was smaller than the original, so I just popped out the switch and used it in the original pedal housing. Unfortunately, I had to leave out the remote steering as the steering on the car was not the correct length to use with a motor. The steering motor did fit in place, so it is likely a standard size that would work in many other vehicles. I will likely look at it again when I have more time, and I am sure I can find a way to make it work. The biggest downside to this upgrade was leaving previous sound and lighting electronics unplugged as they are setup for 6v; however, I do plan to buy 12v to 6v step down so I can reconnect the lights and sounds. The results after install were astonishing. I have not actually verified speed, but before the upgrade on the very well used 6v battery this thing was going maybe 2.5mph at best. I can definitely say after the upgrade it is at least 8mph possibly closer to 10mph. When I sent my kid for the first test drive we were both astonished. I guess in theory it is to be expected, but wow, this thing flies! I do wish that it was able to have a low and high speed, which will be my next thing to try and figure out, as I have nieces and a nephew who I do not believe could handle the speed of this thing!

### ⭐⭐⭐⭐⭐ Great value for what it is.
*by C***. on July 21, 2022*

My son has the 6v Rollplay GMC Sierra Denali and it nearly matches my truck so he loves it. It’s a little too slow for him now and he has a 24v 4x4, but his brother is now almost ready for a ride on but isn’t tall enough to reach the pedal and doesn’t totally understand steering yet. I got this kit mostly to convert it to remote control, but it converting to 12v is a huge plus not only for speed, but for going up hills from a stop (a 6v is one wheel drive, so it would kick them sideways on acceleration from stop). Like others have said, it isn’t plug and play but great for the money. The wiring is thicker than the 6v wiring, but if I were building it myself, I would have used a thicker gauge. I ended up using both new motors and keeping the old one as a spare since they were marginally quieter then the existing one. I used the existing accelerator pedal since the new one didn’t fit nicely in the plastic. I drilled holes under the dash for the power button and shifter since the wiring wasn’t long enough to go up to the dash and I was time crunched and didn’t have time to nicely splice and heat shrink them. The steering motor didn’t physically fit in the location I needed it to, but looks quality enough. All in all a solid kit.

### ⭐⭐⭐ Steering motor shaft is to small for Dodge Ram power wheels
*by P***N on July 22, 2020*

Works great was pretty straight forward to install assuming your a mechanical minded person. The only thing is the steering motor shaft size was very small I think this is meant for smaller power wheels not the Dodge Ram for sure. The truck steering shafts are much larger in diameter then the motor is so you will have to make a new shaft. I wish they would tell you the size. Also it may be how I wired it but it seems a lot slower and less powerful then it was before but I didn’t use the motors from the kit because the motors I had on the power wheels were fine.

## Frequently Bought Together

- Kids Ride On Car 12V DIY Modified Harness Complete Set of Remote Control Circuit Borad Wires Switch Gearbox with Motors, Children Electric Ride On Car Accessories
- ExpertPower 12v 7ah Rechargeable Sealed Lead Acid Battery

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-09*