Mk3 NC Brake Master Cylinder

Technical Area Wheels, Tyres & Brakes
2

I have a Mk3 NC 2.0 sport 2006

After doing some brake upgrades for a track day in the summer the garage I used, SPA MX5 Specialists in Ilkeston (highly recommended) pointed out that my brake master cylinder is leaking slightly. It manage to still survive a track evening at Donington but this is definitely something I need to get sorted. Brakes/tyres should definitely not be neglected!

I have had the car a couple of years and the bubbling around the servo has always been there. I assumed that this was from where somebody had previously spilt brake fluid when topping up in the past.

Unfortunately the master cylinder as a part is almost impossible to get hold of with no third parties selling them and a new servo and master cylinder from Mazda direct are around £350 for each item. Not a cheap bill!

On ebay I have found the following: https://www.ebay.co.uk/itm/MAZDA-MX5-MK3-NC-2005-2015-BRAKE-MASTER-CYLINDER-SERVO-N12343800/183837170179?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2650#vi-ilComp

This states that it only fits the 1.8 model. Does anybody know if the servo and master cylinder are actually the same for the 1.8 and 2.0?

I would rather take the punt on a £35 used item plus labour and hope this works perfectly first than spend £700+ on a new servo and master cylinder.

3

I cannot be totally sure but would think that the servo and master cylinder will be the same for 1.8 and 2.0 MK3.

Compare visually and together with any part numbers, that should confirm.

Not known for failure, hence the very cheap price for s/h part. If in doubt contact someone with a 2.0 to break or confirm with dealer.

£700 for new is not an option I would consider.

4

Give these people a ring, pretty local to you too Notts??

https://pmsportscars.com/index.php?route=common/home

They don’t show anything on their website but from visiting a couple of time they always have Mk3 cars in to break.

5

For the record the 1.8 & 2.0 are different 

6

As Rodders says they are different and also change part number part way through the NC1 build.

Therefore you would have to sight the replacement parts.

7

Damn - thanks for the heads up about the difference guys. I will try give them people above a call to see if they happen to have any.

Luckily it’s only a weekend car and is being driven even less at the moment with winter so I will hold out for a while. Hard to justify spending so much on a part like that.

Does anybody know if it is advised to change both the servo and the brake master cylinder? As it is just the brake master cylinder leaking I assume the servo is fine?

8

Hi Alex

No need  to replace the servo if working OK - just swap the master cylinder over. 

If you look on ebay most are sold as a complete unit so a good clean combined part to replace your faulty MS and paint damaged servo probably the way to go.

Unfortunately my gut feeling on these parts being the same was wrong as pointed out. Very difficult to get information and most part numbers quoted on ebay are off the servo unit which may have some commonality throughout the range. It appears that the 1.8 MK3 has a different master cylinder to the MK3 2.0. Later MK3.5 cars on are different again as wider pipes for the DSC.

Have a good look at your master cylinder for a part number and put it up on here. I would also look at similar age 2.0 MK3s that are being broken and get to the correct part that way.         

 

9

Have you considered a seal kit before replacement.

10

Same issie for me on my 1.8 Miyako - bought the unit from ebay @ £35 as an insurance measure.  We will wait and see.

11

I cannot find a seal kit from the people that I use and nothing from Mazda.

I would be of the opinion some companies that refurb master cylinders in the spares box would have seals that will fit and that could be the way to go.

12

Alex PM me yor vin number and I will advise parts numbers if you think that would help.