Nissan Micra (1992 - 2003) - 2001 1.4 Brake discs

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Sat 18 Oct 2008 21:35
2001 1.4 Brake discs - Doc
The front pads need changing (after 15000 miles)
and the discs have a noticeable lip on them, although they are not scored or cracked.
Total mileage of car is 38000.
Why do discs have a service limit?
What would be the effect if I ignored the wear and just changed the pads?

Also, having looked in the workshop manual, it seems that the discs are not mechanically fixed to the hub. Is this correct?


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Sat 18 Oct 2008 23:50
2001 1.4 Brake discs - McP
The older micra has no mechanical fixing, nor does my 2000 Primera 2.0.
Easy to change - Just remove the wheel and caliper.
I ran a mile from my Neighbours Hyundai Accent - Wheel bearing is in the disk.

I only changed the pads on my Primera with a 1mm lip. No problems encountered in 20K miles. Most of my driving is motorway, so little braking.

I don't know why they have a service limit.
Mechanical interference?
Less material to dissipate the heat?
There should be some measurements/limits in the service manual.

Nissan are reasonable for service parts but the brakes are quite pricey.
You can get mintex disc/pad sets from ebay quite cheaply. Recommended by other Nissan owners. Any decent make should be suitable. EBC green stuff for clean alloys!

SHMBO has a 99 Micra 1.0. The 1.4 must be quite nippy.
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Sun 19 Oct 2008 15:17
2001 1.4 Brake discs - piston power
Why do discs have a service limit?
What would be the effect if I ignored the wear and just changed the pads?


Discs have a service limit because they wear and if too thin can crack as they get hot.

Depends on how worn the disc is if it has a lip on the disc on the outer edge this will grind into the new pads and cause them to squeek on braking.

15,000mls is poor for a set of pads how do you drive? is the foot on the brake all the way down a hill?

Try a new driving style you should be able to get more than that even round town.
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Sun 19 Oct 2008 15:21
2001 1.4 Brake discs - mfarrow
and the discs have a noticeable lip on them although they are not scored or
cracked.


Got a filing sander? Put it into first and grind it off.

But as suggested check they're not worn beyond the manufacturers recommendation.
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