---
product_id: 649372258
title: "BY-J Throttle Response Controller, 9 Drive 10-Modes FLC-821 Universal Car Electronic Throttle controller, Compatible with Toyota Tacoma/FJ Cruiser/4Runner/Hilux/Prius/Fortuner/Innova"
price: "€ 79.98"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.gr/products/649372258-by-j-throttle-response-controller-9-drive-10-modes-flc
store_origin: GR
region: Greece
---

# 9 adjustable acceleration levels 10 customizable driving modes Plug & play easy installation BY-J Throttle Response Controller, 9 Drive 10-Modes FLC-821 Universal Car Electronic Throttle controller, Compatible with Toyota Tacoma/FJ Cruiser/4Runner/Hilux/Prius/Fortuner/Innova

**Price:** € 79.98
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock your car’s true potential with precision throttle control!

## Quick Answers

- **What is this?** BY-J Throttle Response Controller, 9 Drive 10-Modes FLC-821 Universal Car Electronic Throttle controller, Compatible with Toyota Tacoma/FJ Cruiser/4Runner/Hilux/Prius/Fortuner/Innova
- **How much does it cost?** € 79.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/649372258-by-j-throttle-response-controller-9-drive-10-modes-flc)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Setup:** Plug and play installation means you’re ready to hit the road in minutes.
- • **Tailor Your Drive:** Choose from 10 modes and 9 intensity levels to perfectly match your driving style.
- • **Safe & Smart Design:** Built-in protection circuit prevents damage and ensures worry-free installation.
- • **Universal Compatibility:** Seamlessly fits popular Toyota models from 2003 to 2023 with electronic throttle systems.
- • **Instant Throttle Response:** Eliminate accelerator lag and enjoy lightning-fast acceleration every time.

## Overview

The BY-J Throttle Response Controller (Model FLC-821) is a universal electronic throttle booster designed for select Toyota models (2003-2023). It offers 10 driving modes with 9 adjustable acceleration levels to eliminate throttle lag and enhance driving sensitivity. Easy plug-and-play installation with built-in safety features ensures a seamless upgrade to your vehicle’s throttle response.

## Description

Buy BY-J Throttle Response Controller, 9 Drive 10-Modes FLC-821 Universal Car Electronic Throttle controller, Compatible with Toyota Tacoma/FJ Cruiser/4Runner/Hilux/Prius/Fortuner/Innova: Throttle Controls - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works great on my 2019 Nissan Titan - No lights or codes. Worked immediately, easy set up, plug and play. Good price 👍 and quality item. It took me about 30 minutes to install. It really wakes up the throttle response. Good product for the money. Highly recommend product and seller.
Review: It really does remove the delay in your pedal - This was well worth the price, which btw is low in comparison to the other throttle controllers. My BMW came with a similar controller from the factory. I bought a truck and the delay was killing me, but with this controller, my truck acts like it has a cabled throttle. What I wanted was to remove the excessive delay and the lagging throttle response and this product does just that! The install was super easy and worked great right out of the box. P3.9 setting did cause my CEL to come on because one of the computers saw the controller and deemed the voltage out of tolerance. I reset it and it hasn’t came back on. I drove around a lot today and there were times when muscle memory kicked in causing my rear tires to slip a bit. I’m glad I got this because it was well worth the cost. I’ll review again after a month or so. Aug 8, 23 Update…I can’t drive without this tool! Regular throttle response is slow. I started at 2.5 and worked my way to 3.8. 3.9 sets off my dash with errors with 4WD on auto and 3.8 is only a hair delayed and can’t even tell. I wouldn’t start at 3.xx unless you’re used to the response. Other than that, I highly recommend this product. Also Silverados have been using similar products, so don’t be afraid to use this.

## Features

- [Functions] The Electronic Throttle Accelerator Controller is a booster which control car throttle open to improve the sensitivity driving experience of the car to adapt to different driving habits and keep in a better driving conditions. It can eliminate the accelerator delay, solve the slowly start, increase the throttle respond speed. Achieve the best speed rate.
- [Fit Vehicle Models] Model 821 is Compatible with Tacoma SR/SR5/TRD Sport/TRD Off-Road/Limited/TRD Pro 2005-2023(2th & 3th Gen), Compatible with FJ Cruiser Base/4WD/2WD/TRD 2006-2018, Compatible with 4Runner Base/Limited/Limited V8/SR5/SR5 V8/Sport/Sport V8 2003-2009(4th Gen Only), Compatible with Hilux SR/SR5/Extra Cab/TRD/VIGO/VNT 2006-2015(7th Gen Only), Compatible with Fortuner 2006-2015/Innova 2006-2015/Mark X 2006-2009/Prius 2005-2009/Prado 2005-2009.
- [9 Drive & 10 Modes] - The electronic throttle response controller has 10 different modes,each driving mode has 9 levels of intensity adjustment( level 1-9 for the acceleration, the acceleration sense from weak to strong is very obvious), you can adjust them to find the most suitable mode. You can see the mode number and intensity level on the display, and you can easily adjust the mode through the buttons.
- [Easy to install] Install this accelerator when the car is powered off, follow the user manual or installation photos, plug and play. All adjustments must be made during safe driving. (Note: This electronic throttle controller is only applicable to some cars with electronic throttle. Please make sure your car is an electronic throttle with plug. Our products do not support mechanical throttle.)
- [Notes] If you install it in the wrong direction during installation, this will cause the accelerator pedal to be ineffective and the engine fault light to appear. Please do not worry. This product has a protection circuit inside, so it will not damage the original vehicle components. At this time, you should turn off the engine immediately. , remove the product, wait at least 2 minutes for the protection circuit to resume normal operation, and then install the product in the correct direction.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | BY-J |
| Brand | BY-J |
| Model | Throttle-F6-821 |
| Item Weight | 6.4 ounces |
| Package Dimensions | 5.5 x 3.5 x 2 inches |
| Manufacturer Part Number | Throttle-F6-821 |

## Images

![BY-J Throttle Response Controller, 9 Drive 10-Modes FLC-821 Universal Car Electronic Throttle controller, Compatible with Toyota Tacoma/FJ Cruiser/4Runner/Hilux/Prius/Fortuner/Innova - Image 1](https://m.media-amazon.com/images/I/61rYguZNtuL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great on my 2019 Nissan Titan
*by E***D on January 17, 2026*

No lights or codes. Worked immediately, easy set up, plug and play. Good price 👍 and quality item. It took me about 30 minutes to install. It really wakes up the throttle response. Good product for the money. Highly recommend product and seller.

### ⭐⭐⭐⭐⭐ It really does remove the delay in your pedal
*by J***E on May 25, 2023*

This was well worth the price, which btw is low in comparison to the other throttle controllers. My BMW came with a similar controller from the factory. I bought a truck and the delay was killing me, but with this controller, my truck acts like it has a cabled throttle. What I wanted was to remove the excessive delay and the lagging throttle response and this product does just that! The install was super easy and worked great right out of the box. P3.9 setting did cause my CEL to come on because one of the computers saw the controller and deemed the voltage out of tolerance. I reset it and it hasn’t came back on. I drove around a lot today and there were times when muscle memory kicked in causing my rear tires to slip a bit. I’m glad I got this because it was well worth the cost. I’ll review again after a month or so. Aug 8, 23 Update…I can’t drive without this tool! Regular throttle response is slow. I started at 2.5 and worked my way to 3.8. 3.9 sets off my dash with errors with 4WD on auto and 3.8 is only a hair delayed and can’t even tell. I wouldn’t start at 3.xx unless you’re used to the response. Other than that, I highly recommend this product. Also Silverados have been using similar products, so don’t be afraid to use this.

### ⭐⭐⭐⭐⭐ READ INSTRUCTIONS!
*by A***L on May 4, 2025*

2021 ram 1500, 5th gen body style with the 5.7 hemi. This thing works! BIG THING, READ INSTRUCTIONS! I first tried to just plug and play but that didn’t work. You need to follow instructions for it to “learn vehicle”. Night and day difference from normal to sport or sport+! Don’t burn 300 bucks on the pedal commander, 50 for the exact same thing, no I doesn’t really make the truck faster, neither does the pedal commander but it does get rid of the lag you get on the pedal. $50 is cheap compared to other options and it works well so far! Update after a couple months of use. Works well so far BUT sadly around every month I have to have it relearn the vehicle or else it starts acting funny and makes acceleration funny. Overall still a great 50 buck deal!

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-23*