GQ Patrols share a similar brake system to the 160 series. This page aims to identify all the components and explain their similarities/differences.

Front Brake Calipers

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Single Piston

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Summary: Most parts are interchangable.
The majority of GQ and 160 use the same single-piston sliding calipers, and as such use the same brake pads. The complete caliper is not a direct swap though, as the 'cages' have different offsets to suit the different swivel hubs. The cages can be swapped though, so the 'working-parts' are compatible.

Front Brake Pads

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Summary: Compatible
Due to the calipers being identical, the brake pads are also identical.

Front Brake Discs

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Summary: Compatible
These are the same size, thickness, and have the same bolt pattern to the swivel hub.

Multiple Piston

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Summary: (Probably) Not Compatible

The twin piston calipers (and rotor?) from a GQ/GU Patrol can be swapped with the single piston calipers also from a GQ. Because of the caliper cage offset difference mentioned above, the twin piston calipers will likely not fit correctly on MQ, but could easily be corrected.
Some GQ swap info: http://www.patrol4x4.com/forum/nissan-patrol-gq-y60-ford-maverick-11/bra...

Four piston calipers are available on some GU Patrols. These can be swapped with the GU twin piston calipers. From this, we can assume they would have the same problems if attempted to fit to a MQ.

Rear Brakes

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Drum Rear

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Some GQ feature drum disk on the rear. It is unknown if these are the same as 160 units. According to the following thread, the GQ disc brake rear end cannot be swapped onto the GQ drum brake diff. The whole diff needed changing.
http://www.patrol4x4.com/forum/nissan-patrol-gq-y60-ford-maverick-11/dru...

Disc Rear

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Summary: Not Compatible
Many GQ feature disc brakes on the rear, whereas the 160 are drum. The parts are not easily swapped (ie they are NOT a bolt-on proposition). Refer to the rear disc brake conversion wiki page for more info.

Master Cylinder

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Summary: Compatible
The GQ master cylinder has a bigger bore than its 160 counterparts (24.5mm vs 23.1mm). It also features different outlet locations and reservoir bottle. Regardless of these difference, it bolts onto the 160 with only the simplest of mods, and provides better performance at the same time. It is a worth-while upgrade.

Brake Booster

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Summary: Mods Required to Fit
The GQ master cylinder is a dual-servo type, providing better braking feel/performance. It is also a smaller diameter than the 160 counterpart, but is longer (from the firewall). It can be adapted easily into the 160, however the master cylinder may hit the battery tray. This could require a notch to be cut in the tray.

jclures on Patrol4x4 has done the conversion, see: http://www.patrol4x4.com/forum/nissan-patrol-mq-mk-12/my-mk-nissan-rear-...
Quote: It was not difficult to fit, the four mounting bolts on the GQ booster had to be shortened and the actuator rod also had to be shortened as well, but neither was a problem.
It only just fits in my Nissan as I have relocated the battery carrier, but it should not be a problem to fit in any other Nissan MQ/MK.

Handbrake

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Summary: Unlikely Compatible
Both models feature mechanically operated drum brakes fitted to the rear of the transfer cases, which work as the hand brake. Due to each model using different driveline components, it is unlikely that the parts are interchangable. Handbrakes cables may be compatible, however GQ is likely longer (due to a longer gearbox+transfer assembly). It is unknown if the pads and drum itself are the same.

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