Why 2012 Honda Accord Vibration When Accelerating?

The 2012 Honda Accord is a popular and reliable vehicle known for its performance and longevity. However, like any car, it can develop issues over time, including vibration when accelerating. Addressing these vibration issues is essential for a smooth and comfortable driving experience. This article will discuss the common causes of 2012 Honda accord vibration when accelerating, how to diagnose the source, and repair and maintenance solutions to resolve the problem.

Common Causes Of Vibration When Accelerating

When you feel vibrations in your vehicle while accelerating, it can be unsettling and potentially dangerous. These vibrations can be caused by a variety of factors, including engine problems, transmission problems, suspension and steering issues, and brake concerns. In this detailed explanation, we’ll break down the most common causes of acceleration vibration, as well as the associated symptoms and potential solutions for each problem.

Engine-Related Issues

  • Misfiring Spark Plugs
  • Dirty Fuel Injectors
  • Broken Motor Mounts

Misfiring Spark Plugs

Spark plugs are critical in igniting the air-fuel mixture in the cylinders of your engine. When spark plugs fail to ignite the mixture properly, it results in uneven power distribution and vibrations. Rough idling and reduced fuel efficiency are signs of misfiring spark plugs. Replacing the faulty spark plugs usually solves the problem.

Dirty Fuel Injectors

Fuel injectors that are clogged or dirty can disrupt the flow of fuel into the engine cylinders, resulting in an imbalance in power delivery. When you accelerate, this imbalance can cause vibrations. Cleaning or replacing the fuel injectors can assist in restoring proper fuel flow and resolving the issue.

Broken Motor Mounts

Motor mounts are intended to secure the engine in place. When they wear out or become damaged, the engine may move excessively during acceleration, causing noticeable vibrations. To resolve this issue, the broken motor mounts must be replaced.

Transmission-Related Issues

  • Worn-Out Transmission Mounts
  • Damaged Torque Converter
  • Poor Transmission Fluid Quality

Worn-Out Transmission Mounts

Transmission mounts are in charge of keeping the transmission in place. When they wear out, the transmission can move excessively, causing acceleration vibrations. The solution to this problem is to replace the worn mounts.

Damaged Torque Converter

The torque converter is an essential part of automatic transmissions. When accelerating, a faulty torque converter can cause vibrations. Slippage and strange noises are possible symptoms. A thorough inspection of the torque converter is required, and if it is damaged, replacement may be required.

Poor Transmission Fluid Quality

Transmission fluid that is contaminated or deteriorated can cause poor transmission performance and vibrations. Regular transmission fluid changes and maintenance are required to avoid this problem. To restore optimal transmission performance, flush and replace the old fluid with the manufacturer’s recommended type.

Suspension and Steering Issues

  • Unbalanced Tires
  • Worn-Out Wheel Bearings
  • Damaged CV Joints

Unbalanced Tires

Vibrations can be caused by improperly balanced tires, especially during acceleration. The steering wheel may wobble as a symptom. This issue can be resolved by having the tires balanced at a reputable service center.

Worn-Out Wheel Bearings

Damaged or worn wheel bearings can produce vibrations and noise while driving. The symptoms may worsen when accelerating. Replacing the faulty wheel bearings is essential to eliminate the vibrations and ensure safe driving.

Damaged CV Joints

Constant Velocity (CV) joints are critical components of your vehicle’s front-wheel-drive or all-wheel-drive system. Worn or damaged CV joints can lead to vibrations during acceleration and turns. Replacement of the affected CV joint is necessary to resolve this issue.

Brake-Related Issues

  • Warped Brake Rotors
  • Loose Caliper Bolts
  • Glazed Brake Pads

Warped Brake Rotors

Unevenly worn or warped brake rotors can cause vibrations not only when braking but also during acceleration. This issue typically requires resurfacing or replacing the brake rotors to ensure smooth and safe driving.

Loose Caliper Bolts

Loose or damaged caliper bolts can create vibrations during both braking and acceleration. Tightening or replacing these bolts is necessary to eliminate the vibrations and maintain brake performance.

Glazed Brake Pads

Overheated brake pads can lead to vibrations and reduced braking performance. Brake pads that have become glazed should be replaced with new ones to restore proper braking function and eliminate vibrations.

Repair And Maintenance Solutions

Engine-Related Repairs

Replacing Spark Plugs

One essential aspect of maintaining a smooth-running engine is to replace spark plugs periodically. Spark plugs play a crucial role in igniting the air-fuel mixture in the combustion chamber. Over time, they can become fouled or worn, leading to suboptimal engine performance and vibrations. Replacing spark plugs as part of your regular maintenance routine ensures a consistent and efficient ignition process, reducing engine vibrations and improving overall performance.

Cleaning or Replacing Fuel Injectors

Fuel injectors are responsible for delivering the right amount of fuel into the combustion chamber. Clogged or dirty fuel injectors can disrupt this process, resulting in irregular fuel flow and, consequently, engine vibrations. To restore proper fuel flow and minimize these vibrations, it’s necessary to either clean or replace clogged fuel injectors. This maintenance step helps maintain engine efficiency and smooth operation.

Replacing Motor Mounts

Motor mounts are critical components that support the engine and reduce vibrations. Over time, they can deteriorate or become damaged, leading to excessive engine movement and increased vibrations. By installing new motor mounts, you stabilize the engine and significantly reduce unwanted vibrations. This not only improves the driving experience but also prolongs the lifespan of various engine components.

Transmission-Related Repairs

Replacing Transmission Mounts

Similar to motor mounts for the engine, transmission mounts are essential for stabilizing the transmission system. Worn transmission mounts can lead to excessive movement and vibrations in the transmission, which can affect overall vehicle performance. Replacing these mounts is crucial to minimize vibrations and ensure the proper functioning of the transmission.

Servicing or Replacing the Torque Converter

The torque converter is a key component in an automatic transmission system. If it malfunctions or becomes faulty, it can lead to undesirable transmission vibrations and performance issues. To eliminate these vibrations and restore smooth transmission operation, it’s necessary to have a professional mechanic service or replace the torque converter as needed.

Changing Transmission Fluid

Regularly changing the transmission fluid is a vital maintenance task that contributes to a well-functioning transmission system. Over time, old or contaminated transmission fluid can cause shifting problems and increase vibrations. Replacing the fluid with fresh, high-quality transmission fluid not only improves transmission performance but also reduces vibrations, ensuring a smoother ride.

Suspension and Steering Repairs

Balancing and Aligning Tires

Properly balanced and aligned tires are essential for a smooth and comfortable ride. Imbalanced or misaligned tires can result in vibrations that are transmitted to the steering wheel and throughout the vehicle. Having a professional balance and align your tires ensures optimal performance and minimizes these vibrations, contributing to a safer and more comfortable driving experience.

Replacing Wheel Bearings

Wheel bearings are crucial for reducing friction between the wheel and the axle, and worn-out bearings can lead to vibrations and noise. By installing new wheel bearings, you can eliminate these unwanted vibrations and ensure a quieter and smoother ride.

Replacing CV Joints

CV (constant velocity) joints are integral parts of the drive axles that transmit power from the transmission to the wheels. Damaged CV joints can cause vibrations, particularly during acceleration and turns. Replacing damaged CV joints is necessary to restore proper performance and reduce vibrations, ultimately enhancing the driving experience.

Brake-Related Repairs

Resurfacing or Replacing Brake Rotors

Warped or unevenly worn brake rotors can lead to vibrations when braking. Resurfacing or replacing these rotors ensures a smooth and even surface for the brake pads to contact, eliminating vibrations during braking and enhancing braking performance.

Tightening Caliper Bolts

Properly tightened caliper bolts are essential for the stability of the brake system. Loose caliper bolts can lead to vibrations during braking and acceleration. Ensuring that caliper bolts are tightened to the manufacturer’s specifications helps prevent such vibrations and promotes safe braking and acceleration.

Replacing Brake Pads

Worn-out brake pads can cause vibrations during braking and reduce braking performance. Installing new brake pads not only eliminates these vibrations but also ensures efficient and responsive braking, contributing to safety and control while driving.


Regular maintenance is crucial for the longevity and performance of your 2012 Honda Accord. By addressing common causes of vibration when accelerating, such as engine, transmission, suspension, and brake issues, you can enjoy a smoother and more comfortable driving experience. If you are unsure about the source of the vibrations or how to address them, consult a professional mechanic for expert advice and assistance.

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Ammar Masoud

I have had a long and fulfilling career in the automotive industry, primarily with Honda and Acura. With 15 years of experience as a Honda service technician, I became highly skilled in repair and maintenance, gaining a deep understanding of these vehicles. After many years in the automotive field, I decided to embark on a second career in industrial manufacturing. It was a significant change, but I found that the skills I had honed in the automotive industry were incredibly valuable in my new role. In my current position in industrial manufacturing, the demand for quality workmanship and meticulous attention to detail is paramount. Fortunately, these are traits that I have cultivated throughout my years in the automotive industry. I take pride in applying these skills to meet the high standards expected in the manufacturing sector.