2001 s430 brake bleeder screw size
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 20
Likes: 3
From: CA
2001 s430, 1999 clk 320
2001 s430 brake bleeder screw size
I've looked all over and can't seem to find the brake bleeder screw size(s) for a 2001 s430. I've been able to find a couple different screws that supposedly fit the fronts, but none for the rears, and no sizing information.The front calipers are 20.7046.04 and the rears are 421221300. If anyone can point me to where I can find this information I would really appreciate it.
Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
The caliper bleeder screws ARE NOT a 'standard' bolt. They have a softer tapered seat and looser threads that seals leak tight. You MUST get new ones from either another caliper (junkyard? or a Dealer can likely order them for you. While a 'standard' metric bolt might screw in, and even seal around the threads with enough Teflon tape, that is only a very temporary and emergency fix.
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 20
Likes: 3
From: CA
2001 s430, 1999 clk 320
The caliper bleeder screws ARE NOT a 'standard' bolt. They have a softer tapered seat and looser threads that seals leak tight. You MUST get new ones from either another caliper (junkyard? or a Dealer can likely order them for you. While a 'standard' metric bolt might screw in, and even seal around the threads with enough Teflon tape, that is only a very temporary and emergency fix.
A customer service rep from Carson Quality Brake responded to my inquiry and told me their part #H9428 will work for the rear as well as the front even though it's listed everywhere as front bleeder screws. This part is sold on ebay as well as several mainstream automotive stores. So far the only sizing I'm seeing is from O'Reilly. They list #H9428 as Size/Thread: 8mm (M8 X 1.25); Length: 35.3mm.
I will report back when I have more information.
Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
I have never measured the bleeder screws, and have never seen different sizes. From very heavy agricultural, aircraft, trucks, autos, motorcycles.
The 8mm x 1.5 diameter and thread pitch---looks correct.
The 8mm x 1.5 diameter and thread pitch---looks correct.
