Honda Accord Knocking Noise? Here's How to Diagnose & Fix It

How to Fix Knocking Noise

Is your 2025 Honda Accord making an unsettling knocking noise? This sound can be alarming, leaving you wondering about potential damage. While the cause can vary, one area of concern for owners has been related to components and their installation. As one owner reported, "Was able to get $36k otd. I’m keeping this thing forever 🥰😍" (Tradition-Complete). This guide will walk you through potential causes, diagnosis, and steps to fix the knocking noise in your vehicle.

Symptoms

Owners describe the symptoms associated with the knocking noise in a few ways. A primary complaint isn't always consistently described, making a precise diagnosis somewhat challenging initially.

One common observation is a general sense of something being "sicker" or "buggy." While not a direct description of the sound, this suggests the knocking noise is often accompanied by other performance issues, potentially related to the vehicle's overall operation. Owners may observe the car not performing up to par or struggling in certain situations.

"High pitch noise" is another symptom that may be related to the knocking sound, depending on the context and precise location. It is important to note that a high-pitched squeal could also be due to issues with the spoiler, coilovers, harbor freight socket, rear caliper, or front. It's important to distinguish the source and quality of sound when attempting any repair.

Although "takeovers" are a term, not a symptom, you may experience this if your repair attempts end in failure.

Another described symptom is a "leak." Although the data is limited, leaks may manifest as fluid dripping from the vehicle, potentially correlating with specific types of knocking sounds if, for example, a leak causes engine components to be insufficiently lubricated.

Most Likely Cause

Based on available owner reports, the primary cause of knocking noise in your 2025 Honda Accord appears to relate to incorrectly installed or faulty aftermarket parts. While the data is limited, the issues with the spoiler, coilovers, harbor freight socket, rear caliper, or front could manifest as knocking noises if they are poorly installed or are of substandard quality. These items can be associated with noises if they are not properly attached, adjusted, or maintained.

How to Diagnose

Diagnosing the source of the knocking noise will require careful observation and a systematic approach:

1. Listen Carefully: Try to pinpoint when the noise occurs. Does it happen at idle, during acceleration, or when braking? Does the sound come from the front, rear, or center of the vehicle? Note down specific conditions when you hear it.

2. Visual Inspection: Check for obvious signs of damage or loose components. Focus particularly on the spoiler, coilovers, rear caliper, and front components, as these have been mentioned in connection to the noise. Look for signs of leaks, cracks, or any parts that appear to be out of place.

3. Component Check: Manually inspect and test each component. For example, test if the bolts that affix the spoiler are adequately tightened. Do not over-tighten them, however.

4. Road Test: Carefully drive the vehicle under different conditions to try and reproduce the noise. Have a passenger assist in identifying the source of the sound while driving.

5. Professional Diagnostic: If you are unable to determine the source of the noise, consider taking the vehicle to a qualified mechanic for a professional diagnostic assessment.

Tools Required:

• Jack and Jack Stands
• Socket Set
• Wrench Set
• Screwdrivers
• Torque Wrench
• Inspection Light
• Safety Glasses
• Gloves

Step-by-Step Fix

The repair will depend on the specific cause identified during the diagnosis. Here's a general guide based on the potential issues:

1. Gather Information: Start by documenting all the instances of the knocking noise. Note when it happens, where it seems to be coming from, and any associated symptoms.

2. Inspect the spoiler: Ensure that the spoiler is securely attached to the vehicle. If the spoiler is loose, tighten all the bolts that affix it to the vehicle.

3. Inspect the coilovers: Coilovers are related to your vehicle's suspension, and they may cause noise if they are not properly installed. Ensure that they are properly installed.

4. Check the Rear Caliper: The rear caliper may cause noise if there is not adequate lubrication. Disassemble and lubricate the rear caliper as necessary.

5. Professional Repair: If you are not comfortable performing the repairs yourself, take the vehicle to a trusted mechanic for professional service.

Owner Experiences:

As one owner reported: "Just got a 2026 Hybrid Touring and I’m in love with it! Traded in my 2017 Accord and so glad I" (grknick). This highlights the sentiment many owners feel toward their vehicle.

Parts and Tools Needed

• Replacement Parts (based on diagnosis)
• Socket Set
• Wrench Set
• Screwdrivers
• Torque Wrench
• Inspection Light
• Safety Glasses
• Gloves

Real Owner Costs

The cost of fixing a knocking noise can vary significantly depending on the root cause and the extent of the repairs needed. Here's a breakdown:

• DIY Repair: If the issue is a loose component that you can tighten yourself, the cost might be minimal (under $20) for basic tools or replacement bolts.

• Professional Diagnostic: A diagnostic assessment at a mechanic shop typically costs between $75 and $150.

• Component Replacement: Replacing a faulty component, such as the spoiler, coilovers, rear caliper, and front components, can range from $100 to $500+ depending on the part and whether you opt for OEM or aftermarket.

• Labor Costs: If you choose to have a mechanic perform the repair, labor costs can add an additional $100 to $500+ depending on the complexity of the job.

One owner mentioned spending "$36k otd." (Tradition-Complete)

Prevention

While it's not always possible to prevent mechanical issues, here are some tips to help reduce the risk of knocking noises:

• Regular Maintenance: Follow the recommended maintenance schedule in your owner's manual. This includes regular oil changes, fluid checks, and inspections. As one owner stated, "Any tips or tricks for a new CR-V owner? Also, I noticed there’s no specific maintenance schedule." (grknick).

• Careful Driving: Avoid aggressive driving habits such as hard acceleration and braking, which can put extra stress on engine components.

• Quality Fuel: Use the recommended fuel grade specified in your owner's manual.

• Inspect Regularly: Periodically inspect your vehicle for any signs of leaks, damage, or loose components.

What Owners Say

Real experiences from HONDA owners:

Owner Experiences

"So here's the thing. I've had my Model 3 for almost 3 years now, and while I don't hate it or anything, I'm seriously considering going back to a regular car." — skinner1234567 (source)

"Before anyone jumps down my throat, lemme explain. Save a ton on gas, charge at home, never deal with oil changes again, feel like I'm living in the future." — skinner1234567 (source)

"Just got a 2026 Hybrid Touring and I’m in love with it! Traded in my 2017 Accord and so glad I" — grknick (source)

Real Repair Costs

"Finally got a replacement for my ‘05 Accord with 256k. Picked this ‘14 Wagon up for $7500 with 174k." — Frozen_in_Idaho2316 (source)

"Picked this ‘14 Wagon up for $7500 with 174k. A couple things need some work but so far so good." — Frozen_in_Idaho2316 (source)

"A $45-60k two seater, FWD, hybrid with an auto with all the switch gear and interior bits of a Honda. I don't necessarily want this thing to fail but like, who the hell is gonna buy this over much more engaging cars in the price bracket?" — The_Tender_One (source)

FAQ

Q: How long does it take to fix a knocking noise?

A: The repair time varies greatly depending on the cause. A simple fix like tightening a loose component might take 30 minutes, while a more complex repair like replacing a faulty component could take several hours.

Q: Can I drive with a knocking noise?

A: It's generally not recommended to drive with a knocking noise, as it could indicate a serious underlying issue that could lead to further damage. If you hear a knocking noise, it's best to have your vehicle inspected by a mechanic as soon as possible.

Q: Is this a common issue on the 2025 Honda Accord?

A: Based on the data, the occurrence of knocking noise due to faulty is not a widespread issue.

Q: DIY vs mechanic - what's recommended?

A: If you are comfortable with basic automotive repairs and have the necessary tools, you may be able to diagnose and fix a simple issue. However, for more complex issues, it's best to seek the help of a qualified mechanic. A professional can accurately diagnose the problem and perform the necessary repairs to ensure the vehicle is safe and reliable.