PETERBILT Q21-6155-212 Right Stalk Engine Brake Switch Lever 579

( Manufacturer Part Number: Q21-6155-212 ), ( Type: Engine Brake Switch )

Review PETERBILT 579 Right Hand Shift Stalk Engine Brake Switch Lever Oem fits 2018–2023

The Peterbilt Q21-6155-212 engine brake switch lever, manufactured for Peterbilt trucks from the 2018 to 2023 model year 579 series, is a crucial component that provides the driver with the ability to engage and disengage the engine brake, also known as a Jake Brake. This switch lever is part of the right stalk assembly, which is located on the vehicle's steering column.

This engine brake switch lever is meticulously engineered to deliver smooth and reliable operation. It features a robust design, with a durable metal construction that can withstand the rigors of commercial trucking. The lever itself is ergonomically designed for easy operation, allowing the driver to smoothly engage and disengage the engine brake without disturbing their focus on the road.

The switch lever operates by sending an electrical signal to the engine control module (ECM) when the lever is actuated, which in turn activates the engine brake. This process helps to reduce the workload on the brakes, thereby extending their lifespan and improving the overall performance and safety of the vehicle.

The Peterbilt Q21-6155-212 engine brake switch lever is a direct replacement for the original equipment switch lever. It is easy to install, requiring no modifications to the vehicle. The switch lever comes complete with all necessary hardware for installation, making it a convenient and hassle-free solution for truck owners and fleet operators.

In summary, the Peterbilt Q21-6155-212 engine brake switch lever is an essential component for Peterbilt trucks from the 2018 to 2023 model year 579 series. It is designed to deliver smooth and reliable operation, with a durable construction that can withstand the demands of commercial trucking. Its easy installation process makes it a cost-effective and convenient solution for maintaining the performance and safety of your Peterbilt truck.

Pros and Cons of Buying a Peterbilt Q21-6155-212 2018-2023 579 Engine Brake Switch Lever

The Peterbilt Q21-6155-212 engine brake switch lever is an essential component for drivers operating Peterbilt trucks. It allows the driver to engage and disengage the engine brake, which can help control the speed and reduce wear on the brakes. In this article, we will discuss the pros and cons of buying this part.

1. Improved safety: Engine brakes help reduce the workload on the regular brakes, which can prolong their life and improve safety.

2. Enhanced control: Engine brakes provide additional control over the vehicle's speed, especially when descending steep grades or towing heavy loads.

3. Fuel savings: Using engine brakes instead of regular brakes can help save fuel as engine brakes do not require the engine to idle.

4. Compatibility: This switch lever is specifically designed for the Peterbilt 579 model, ensuring a perfect fit.

5. Durability: Peterbilt is known for manufacturing high-quality parts, and this switch lever is no exception. It is built to withstand the rigors of commercial trucking.

1. Cost: Replacing a switch lever can be an expensive repair, especially for commercial truck owners who may need to purchase multiple parts for their fleet.

2. Installation: Installing the switch lever may require professional assistance, which could add to the overall cost.

3. Availability: Depending on the location and the specific model of the Peterbilt 579, it may be challenging to find this switch lever in stock at local parts stores.

The Peterbilt Q21-6155-212 engine brake switch lever is an essential component for Peterbilt 579 owners. While it may come with a higher cost and installation challenges, the benefits of improved safety, enhanced control, fuel savings, and durability make it a worthwhile investment. It is recommended that fleet owners and commercial truck drivers prioritize the replacement of this part when needed to ensure the safe and efficient operation of their vehicles.

If you are in need of a Peterbilt Q21-6155-212 engine brake switch lever, it is recommended that you purchase it from a trusted and reputable parts supplier to ensure the authenticity and quality of the part. Additionally, consider working with a professional mechanic for installation to ensure a proper fit and function.

Details:

Transmission: EATON FULLER TRANSMISSION. Engine: 14.9L L6 DIESEL CUMMINS ISX15 500HP. Cab Type: 8 HIGH ROOF SLEEPER TRACTOR. Drive Type: 6X4 RWD.

part #: q216155212 prices

• $450.00-$642.34

specifications dashparinterio:

• for makes: Peterbilt
• for years: 2018-2023
• mpn: Q21-6155-212
• type: Engine Brake Switch

returns dashparinterio:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

offer dashparinterio:

• quantity: 1
• availability: In Stock
• sold: 0
• started: November 27, 2025
• options: Ship-to-home

payments dashparinterio:

• other
• wallet: Apple-pay
• credit card: Discover

shipping dashparinterio:

• class: Standard
• service: Standard
• transit: 5-9 Days
• cost: $0.00
• type: Fixed

seller dashparinterio:

• rating: 99.0%
• city: Inman, South Carolina
• # reviews: 8695

general dashparinterio:

• Commercial Truck Parts > Interior > Interior Controls
• condition: Used

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