Do Not Sell My Personal Information Jump to content


Rx400H Brake Discs - Do They Need Replacing?


Recommended Posts

My dealer is suggesting that my brake discs will need replacing when I next have the pads renewed.

I'm not convinced - there is no scoring, nor rust.

What are the criteria for determining whether the discs need replacing? Do I need a micrometer?

Link to comment
Share on other sites


My dealer is suggesting that my brake discs will need replacing when I next have the pads renewed.

I'm not convinced - there is no scoring, nor rust.

What are the criteria for determining whether the discs need replacing? Do I need a micrometer?

brake pads can last many miles/years before they need replacing, so by the time yours are ready for new ones who knows what state your discs are gonna be in.

The may be fine or may be heavily worn.

You dont need a micrometer, you can usually visually inspect them quite easily.

The most common thing is that they wear where the pads had made contact, leaving a prominant 'lip' on the outer edge. This can result in the brakes binding and squeeling at all times. Some places will even grind this lip down for a fraction of the price of new discs.

They can also corrode on the face of them too (not to be confused with surface rust, as this is not a problem). The corrosion will look like the pads haven't been making contact in areas of the disc, and the disc will be quite 'pitted'.

If your really unlucky, then brake discs can also crack.

It will take MANY miles (or faulty binding pads or dodgy driving) for them to wear down to the point of being too thin.

Link to comment
Share on other sites

I would be inclined to ask your Dealer to measure the discs in front of you and then show you what the Lexus suggested replacement thickness is :)

That way you can be assured you are getting good advice.

Link to comment
Share on other sites

  • 4 months later...

Anyone noticed when braking at low speeds, the brakes "slip" for a split second just after engaging and then engaging properly after?

if so, any ideas why?

Yes I have noticed this recently. I believe it has been covered on this forum previously, and is caused by the re-generative braking system.

Nothing to worry about apparantly, though I intend to raise the subject with my dealer at my next service.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...




Forums


News


Membership