So over the weekend I upgraded my front brakes on my 2010 IS250 AWD to IS350 brakes.

Here are my quick install instructions on the upgrade.

Parts needed:
2 Brake calipers from an IS350 or GS350. The ones I sourced from my local junk yard I believe were off of 2009 GS350.
2 Rotors for an IS350. I got mine from tire rack (they were for 2011 IS350 AWD high carbon cryo treated rotors) https://www.tirerack.com/brakes/brak...utoModClar=AWD
Front brake pads for 2011 IS350 AWD https://www.tirerack.com/brakes/brak...utoModClar=AWD
Brake fluid, it might be a good idea to change your brake fluid. In my case I changed my brake fluid to high temp DOT 4 fluid. https://www.tirerack.com/brakes/brak...utoModClar=AWD
Optional - 2 Dust shields from 2011 IS 350 AWD if you dont want to bend and cut the existing dust shield. The dealer wanted $45 per dust shield so I decided just to modify my existing dust shield

Tools needed:
14 mm socket
17 mm socket
sheet metal cutters
hammer
Optional - Brake bleeding tool.

1. Remove the wheel as you would normally
2. Remove the existing caliper don't disconnect the brake line just yet.
3. Remove the caliper bracket
4. Remove your old rotor. If you can't get the rotor loose there is a screw hole in the rotor that you can use a bolt on and break them loose.
5. Modify the existing brake dust shield, cut the part off that will interfere with the new caliper, bent back the lip or cut the lip if needed, to make sure that the new disk is not touching the shield. Be patient and test fit the rotor to make sure you don't have the shield touching the rotor.
6. Put the new rotor on the hub. Prior to putting on the new rotor clean the hub to make the rotor sits flush against the hub.
7. Quickly disconnect the brake line from the old caliper and connect it up to the new caliper. You shouldn't loose too much of brake fluid while doing that. (Do not put the new brake pads in at this point as you don't want brake fluid dripping on the new brake pads).
8. Install your new brake pads. (It is an easy step I am not going into detail on how to as their are other threads on the board regarding how to do this.)
9. Bleed the new caliper while watching your brake fluid level. In my case I used brake bleeding tool but you don't need it to do it.
10. Install your wheel.

Perform these steps for each side. Keep in mind that the calipers and rotors are left or right handed so don't get them mixed up and make sure you install each on the correct side.

The new brakes will fit in the stock 17" IS250 wheel with no issues.

Images:
Difference in rotor size
http://www.flickr.com/photos/ctnewb/9897334656/


Old brakes including caliper.
http://www.flickr.com/photos/ctnewb/9897442073/


New brakes with new calipers.
http://www.flickr.com/photos/ctnewb/9897328316/

 

Nice upgrade. Any pics of the stock 17"s clearing the calipers? Also, how is the brake feel after the upgrade?

 

I will take some pics with the wheels on after I clean my wheels lol. Brake feel is great. They feel like they are more sensitive and smoother in engagement.

The main reason I did this is because I managed to warp the stock rotors. I figured with the larger discs cooling shouldn't be an issue even with my aggressive driving.

 

Ahh, nice nice. Congrats on a successful upgrade!

 

Thanks for the guide, looks nice.

 

just what I was looking for

 

Thanks for the complements guys I am glad I can help this community with the write up.
Some one asked about wheel clearance pic. It is a tight fit but it fits. Here it is:

 

Very nice I'm doing this soon gonna order parts!

 

just be careful when order front rotors. i ordered the wrong parts and finally got it right this time

 

Thanks yea I got Rwd so I should be ok I got 07 is350 rotors.

 

Just installed mine

 

My rear brakes are seized (2007 IS250 AWD with 17"x9.5" +22 Wheels) and picked up some rotors and calipers off a 2007 GS350, is there anything I need to look for when installing them? Also, this may seem dumb, but do they have rear dust shields? I can't seem to find any anywhere.

Thank you for your help.

 

What did you buy for caliper brackets? Do the rotors have to be AWD rotors or can they be just IS350 Rotors?

 

if you're thinking to upgrade, i have a extra set of IS350 rotors for you. brand new. PM if interested

 

There are no brackets required.

If you have an AWD they need to be AWD-compatible rotors, if you have a RWD they can be RWD or AWD rotors.

Jeff