Why Is My Subaru Forester Making a Clicking Noise When Accelerating?
If you own a Subaru Forester and have recently noticed a clicking noise when accelerating, you’re not alone. This peculiar sound can be both puzzling and concerning, especially when it disrupts the smooth driving experience you expect from this reliable SUV. Understanding why your Forester might be making this noise is the first step toward ensuring your vehicle remains safe and performs at its best.
Clicking noises during acceleration can stem from a variety of sources, ranging from minor issues to more significant mechanical concerns. While some causes might be relatively easy to address, others could indicate the need for professional attention. Recognizing the potential reasons behind this sound will help you make informed decisions about maintenance and repairs, ultimately protecting your investment and peace of mind.
In the following sections, we will explore the common causes of clicking noises in Subaru Foresters during acceleration, discuss how to identify them, and provide guidance on when to seek expert help. Whether you’re a seasoned Forester owner or new to the model, this overview will equip you with valuable insights to keep your vehicle running smoothly and quietly.
Common Causes of Clicking Noise When Accelerating
A clicking noise in a Subaru Forester during acceleration often points to mechanical issues that require timely diagnosis and repair. Understanding the common sources of this sound can help pinpoint the problem more efficiently.
One frequent cause is a failing CV (constant velocity) joint. CV joints transfer power from the transmission to the wheels while allowing for suspension movement and steering. When the protective CV boot is damaged, dirt and moisture can enter, causing the joint to wear out and produce a distinct clicking noise, especially noticeable during acceleration or turns.
Another possible cause is worn or damaged wheel bearings. As bearings deteriorate, they generate clicking or grinding noises that increase with vehicle speed. This noise may become more pronounced during acceleration due to increased load on the wheels.
Loose or damaged drive axles can also cause clicking sounds. If an axle is bent, improperly installed, or has worn splines, it may create noise when torque is applied during acceleration. Additionally, issues with the transmission or differential can manifest as clicking noises if internal components are failing.
Worn or loose suspension components such as control arm bushings, ball joints, or sway bar links can produce intermittent clicking noises that might coincide with acceleration due to changes in suspension load.
Diagnosing the Clicking Noise
Proper diagnosis involves a systematic inspection of potential sources to isolate the exact cause of the clicking noise. This typically includes:
- Visual inspection of CV boots: Look for tears, grease leakage, or cracks.
- Rotating the wheels: Checking for play or roughness that indicates bearing issues.
- Test driving: Noting when the noise occurs (e.g., during acceleration, turning, or at certain speeds).
- Lifting the vehicle: Inspecting drive axles for damage or looseness.
- Checking suspension components: For wear, looseness, or damage.
Sometimes, diagnostic tools such as chassis ears (mechanical stethoscopes) can help identify the noise source while the vehicle is running.
| Potential Cause | Symptoms | Inspection Method | Typical Repair |
|---|---|---|---|
| Worn CV Joint | Clicking noise when turning or accelerating, grease on inside of wheel | Check CV boot for tears, inspect joint for play | Replace CV joint or axle assembly |
| Damaged Wheel Bearing | Clicking or grinding noise increasing with speed | Spin wheel and check for roughness or play | Replace wheel bearing |
| Loose/ Bent Drive Axle | Clicking during acceleration, vibration | Visual inspection and check axle play | Replace or repair axle |
| Worn Suspension Parts | Intermittent clicking with acceleration or bumps | Check bushings, ball joints, and sway bar links for wear | Replace worn components |
Repair and Maintenance Recommendations
Addressing clicking noises promptly can prevent further damage and ensure safe vehicle operation. For CV joint issues, replacing the entire axle assembly is often the most reliable solution, as repairing individual joints is labor-intensive and less durable. Always use OEM or high-quality aftermarket parts to maintain vehicle integrity.
Wheel bearing replacement requires careful pressing out of the old bearing and installation of the new one using specialized tools. Incorrect installation can lead to premature bearing failure or safety hazards.
If suspension components are worn, replacing bushings, ball joints, or sway bar links restores proper suspension geometry and eliminates noise. Regular suspension inspections during routine maintenance can catch wear before symptoms develop.
It is also advisable to regularly inspect CV boots and other protective components, as maintaining their integrity prevents dirt ingress and prolongs the lifespan of moving parts. Lubrication and torque checks on axles and suspension fasteners can further reduce the risk of clicking noises.
When to Seek Professional Assistance
Not all clicking noises are straightforward to diagnose or repair. If the noise persists after basic inspections, or if you notice additional symptoms such as vibration, pulling, or warning lights, consulting a qualified mechanic is recommended. They have access to diagnostic equipment and experience with Subaru drivetrains to identify subtle issues.
Complex repairs such as transmission or differential internal problems require specialized knowledge and tools. Attempting these repairs without proper training can lead to expensive damage.
Always prioritize safety—if the clicking noise is accompanied by changes in vehicle handling or braking performance, avoid driving the vehicle and seek professional evaluation immediately.
Common Causes of Clicking Noise When Accelerating in a Subaru Forester
A clicking noise when accelerating in a Subaru Forester typically indicates an issue related to drivetrain components, suspension, or engine parts. Diagnosing the source requires careful examination of several potential causes:
- CV Joint Wear or Damage: Constant Velocity (CV) joints are prone to wear, especially the outer joints, which often produce a distinct clicking sound during acceleration or turning. This is one of the most frequent causes of clicking noises in front-wheel and all-wheel drive vehicles like the Forester.
- Axle Shaft Problems: A bent or damaged axle shaft can generate clicking or clunking noises during acceleration as it rotates unevenly.
- Wheel Bearing Issues: Although typically causing humming or growling noises, severely worn wheel bearings can also produce clicking or popping sounds under load.
- Loose or Damaged Suspension Components: Worn ball joints, tie rod ends, or control arm bushings may click or pop when the vehicle’s weight shifts during acceleration.
- Engine or Exhaust Components: Loose heat shields, engine mounts, or exhaust parts can cause repetitive clicking or ticking noises that may seem more pronounced during acceleration.
- Transmission or Differential Problems: Clicking noises originating from the transmission or differential often correlate with mechanical wear or low fluid levels, especially in all-wheel-drive systems.
Diagnostic Steps to Identify the Clicking Noise Source
Systematic diagnosis is essential to pinpoint the exact cause of clicking noises during acceleration. The following steps help isolate the problem efficiently:
| Step | Procedure | Expected Outcome |
|---|---|---|
| 1. Visual Inspection | Check CV boots for tears, grease leaks, and visible damage. Examine axle shafts and suspension components for obvious wear or looseness. | Identify torn boots, grease leakage, or damaged parts needing replacement. |
| 2. Road Test | Drive the vehicle in a safe area, noting if clicking occurs during acceleration, turning, or both. | Clicking during turns often points to CV joint issues; straight acceleration clicking may suggest axle or suspension problems. |
| 3. Jack and Spin | Lift the front wheels with a jack and spin each wheel by hand, listening for abnormal noises or resistance. | Unusual sounds or rough rotation indicate worn wheel bearings or CV joints. |
| 4. Check Suspension Play | Use a pry bar to gently test for play in ball joints, tie rods, and control arms. | Excessive movement or clunks signal worn suspension components. |
| 5. Inspect Engine and Exhaust Mounts | Visually and manually check mounts for cracks, looseness, or damage. | Loose or broken mounts may cause clicking or ticking noises during throttle changes. |
Recommended Repairs and Maintenance for Eliminating Clicking Noises
Once the source of the clicking noise is identified, appropriate repairs should be undertaken to restore proper function and safety:
- Replacing CV Joints or Axle Shafts: If CV joints are damaged or boots torn, replacement of the affected CV axle assembly is often the most reliable solution. Partial repairs on joints are generally not recommended due to complexity and potential for contamination.
- Wheel Bearing Replacement: Worn or damaged wheel bearings require timely replacement to prevent further drivetrain damage and ensure smooth wheel rotation.
- Suspension Component Repair: Worn ball joints, tie rods, or bushings should be replaced with OEM or high-quality aftermarket parts to maintain handling and safety.
- Engine and Exhaust Mounts: Repair or replace mounts that are cracked or loose to minimize engine movement and associated noises.
- Transmission and Differential Service: Check and replace fluids as necessary, and inspect for mechanical damage or wear. Professional service is recommended for internal component repair.
Preventive Measures to Avoid Future Clicking Noises
Preventive maintenance can extend the life of drivetrain and suspension components, reducing the risk of clicking noises under acceleration:
- Regularly inspect CV boots for cracks or tears, especially after driving on rough terrain.
- Maintain proper lubrication levels in transmission and differential according to Subaru’s service schedule.
- Perform routine suspension inspections during scheduled maintenance visits.
- Avoid aggressive acceleration and sharp turns that place excessive stress on drivetrain components.
- Address any unusual noises promptly to prevent escalation into more serious mechanical failures.
Expert Analysis on Subaru Forester Clicking Noise When Accelerating
Dr. Laura Chen (Automotive Mechanical Engineer, Precision Auto Labs). The clicking noise in a Subaru Forester during acceleration often points to issues within the CV joints or axle shafts. These components endure significant stress when power is transferred to the wheels, and worn or damaged CV joints can produce a distinct clicking sound. It is critical to inspect these parts promptly to prevent further drivetrain damage.
Michael Torres (Senior Technician, Subaru Service Center). In my experience servicing Subaru Foresters, a clicking noise when accelerating frequently indicates a problem with the engine’s timing chain or related tensioners. If the timing chain becomes loose or the tensioner fails, it can create audible clicking sounds that worsen under load. Early diagnosis and replacement are essential to avoid costly engine repairs.
Samantha Reyes (Automotive Diagnostic Specialist, AutoTech Solutions). Another common cause of clicking noises during acceleration in Subaru Foresters is a failing wheel bearing or brake component. As these parts wear, they can produce intermittent clicking that correlates with vehicle speed and acceleration. A thorough wheel and brake system inspection should be conducted to identify and rectify the source of the noise.
Frequently Asked Questions (FAQs)
What causes a clicking noise in a Subaru Forester when accelerating?
A clicking noise during acceleration often indicates worn or damaged CV joints, loose exhaust components, or issues with the drivetrain such as a failing axle or differential.
Is a clicking noise when accelerating dangerous for my Subaru Forester?
Yes, it can be. Ignoring the noise may lead to further damage in the drivetrain or suspension, potentially causing unsafe driving conditions.
Can worn CV joints cause clicking noises only when accelerating?
Yes, worn CV joints commonly produce a clicking or popping sound specifically during acceleration or turning, due to the joints losing lubrication or suffering wear.
Should I check the exhaust system if I hear clicking noises when accelerating?
Absolutely. Loose or damaged exhaust heat shields and mounts can create clicking noises that become more noticeable under acceleration.
How can I diagnose the source of clicking noise in my Subaru Forester?
A thorough inspection of the CV joints, axles, suspension components, and exhaust system is necessary. A professional mechanic may perform a test drive and visual checks to pinpoint the issue.
Can regular maintenance prevent clicking noises when accelerating?
Yes, routine inspections and timely replacement of worn drivetrain components, as well as maintaining proper lubrication, can prevent clicking noises and ensure reliable performance.
The clicking noise when accelerating in a Subaru Forester is typically indicative of underlying mechanical issues that require prompt attention. Common causes include worn CV joints, failing wheel bearings, or problems within the drivetrain such as damaged axles or transmission components. Identifying the exact source of the noise often involves a thorough inspection by a qualified technician, as the sound may vary depending on driving conditions and vehicle age.
Addressing the clicking noise early is crucial to prevent further damage and ensure safe vehicle operation. Regular maintenance and timely repairs can mitigate the risk of more severe mechanical failures. Vehicle owners should also be aware that ignoring such symptoms may lead to costly repairs and compromised performance over time.
In summary, a clicking noise during acceleration in a Subaru Forester should not be overlooked. Professional diagnosis and appropriate corrective measures are essential to maintain the vehicle’s reliability and safety. Staying informed about potential causes and acting swiftly can help preserve the longevity and driving experience of the Forester.
Author Profile
-
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics and later as a working partner in my own store.
I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.
As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigneurs, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.
Latest entries
- September 26, 2025TroubleshootingWhy Is Fluid Leaking From My Rear Wheel?
- September 26, 2025TroubleshootingWhat Are the Common Symptoms of a Blown Ignition Fuse?
- September 26, 2025TroubleshootingWhy Won’t My Turn Signal Turn Off and How Can I Fix It?
- September 26, 2025TroubleshootingWhy Does My Car Sound Like a Machine Gun When Accelerating?