Why Are My Brakes Squeaking?

If you are wondering why your brakes are squeaking, the cause could be something minor, such as moisture on the brake discs, or it could be a sign that part of the braking system needs attention.

Common causes include worn brake pads, surface rust, dirt or debris, new brakes bedding in, glazed components or a sticking brake calliper.

The key is to pay attention to when the noise happens and whether anything else has changed. If the squeaking is persistent, becomes louder or is accompanied by grinding, vibration or reduced braking performance, it is worth getting the brakes inspected.

What Does A Squeaking Brake Usually Mean?

Brake squeaks are usually caused by vibration between the brake pads, discs and nearby components.

Some noises are temporary, while others can indicate wear.

Common causes include:

• Worn brake pads
• Moisture or light surface rust
• Brake dust or road debris
• New brakes bedding in
• Glazed pads or discs
• A sticking brake calliper

The noise alone does not always tell you what the problem is, which is why persistent squeaking should be investigated.

Can Worn Brake Pads Cause Squeaking?

Yes. Worn brake pads are one of the most common reasons brakes may start squealing.

Some pads include metal wear indicators that make contact with the brake disc when the pad becomes excessively worn. This can create a high-pitched squealing sound.

The DVSA MOT inspection manual explains that brake pads worn down to their wear indicator can be treated as a serious defect during an MOT.

Other signs of brake wear can include:

• Grinding noises
• Reduced braking performance
• Vibration when braking
• A brake warning light
• Pulling to one side

If squeaking develops into grinding, the vehicle should be checked promptly.

Why Do My Brakes Squeak After Rain?

If your brakes only squeak after rain, washing the car or leaving it parked overnight, moisture may be responsible.

Brake discs contain exposed metal, so a light layer of surface rust can form in damp conditions.

When you next drive, the brake pads can temporarily make noise as they clear this surface layer.

The RAC identifies moisture and surface rust as common causes of temporary brake noise.

If the squeaking disappears after a few normal braking applications and the brakes otherwise feel normal, it may simply have been caused by moisture.

Persistent noise should still be checked.

Why Are My New Brakes Squeaking?

New brake pads and discs can sometimes make noise while they bed in.

During this period, the new components are developing an even contact surface, so some temporary squeaking may occur.

However, if the noise continues for an extended period or appears alongside vibration, pulling or reduced braking performance, contact the garage that fitted the brakes and ask for them to be inspected.

Can A Sticking Brake Calliper Cause Squeaking?

Yes.

A brake calliper helps press the brake pads against the disc when you apply the brakes. If it does not release correctly, the pad may remain in contact with the disc.

Possible signs include:

• Persistent squeaking
• Uneven brake wear
• Excessive heat from one wheel
• A burning smell
• Pulling to one side

A constant brake noise, particularly when you are not pressing the pedal, should be investigated.

Is It Safe To Drive With Squeaking Brakes?

That depends on the cause.

A brief squeak after rain can be very different from persistent squealing caused by worn components.

You should pay closer attention if the noise is accompanied by:

• Grinding or scraping
• Reduced braking performance
• Vibration
• Pulling to one side
• A brake warning light
• A noticeable change in pedal feel

If braking performance has changed, do not simply continue driving in the hope that the noise will disappear.

Can Squeaking Brakes Cause An MOT Failure?

A squeaking sound itself does not automatically cause an MOT failure.

However, the problem creating the noise might.

During an MOT, the braking system is checked for defects affecting components such as brake pads, discs, callipers and overall braking performance.

If your MOT is approaching and your brakes have started making unusual noises, having them checked beforehand may help identify a developing issue.

You can also book an MOT in Warwick if your annual test is due.

When Should I Get Squeaking Brakes Checked?

Consider arranging an inspection if:

• The brakes squeak every time you use them
• The noise is getting louder
• You hear grinding as well as squeaking
• The vehicle pulls when braking
• The pedal feels different
• Braking performance has changed
• A brake warning light has appeared

An early inspection can sometimes identify wear before it causes damage to other braking components.

What Happens During A Brake Inspection?

A technician can inspect the braking system rather than relying on the noise alone.

Checks may include:

• Brake pad condition
• Brake disc wear
• Brake calliper operation
• Signs of contamination
• Uneven wear
• Overall brake operation

Two cars can make a similar squeaking noise for completely different reasons, so inspection is the best way to determine the cause.

Common Questions About Squeaking Brakes

What Should You Do If Your Brakes Keep Squeaking?

Occasional squeaking does not always mean there is a serious problem, but persistent or changing brake noise should not be ignored.

If your brakes keep squeaking, have started grinding or simply feel different from normal, Just Nice Clean Cars can inspect the braking system and explain what may be causing the issue.

Our Warwick team provides brake inspections, repairs and replacements for cars and suitable light commercial vehicles.

You can also book your vehicle in online or call 01926 836900.

Just Nice Clean Cars
Just Nice House, Millers Road, Warwick, CV34 5AE
For sat-navs use CV34 5AD