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Do I have ABS Brakes?

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Old 11-12-2023, 02:10 AM
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Raindrop
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Question Do I have ABS Brakes?

I have 1988 Porsche 944 base car that I bought 2 years ago. I saw a good deal on remanufactured non-ABS Master Brake Cylinder at Advance Auto Parts and I am thinking of installing it.

But I am not sure if my car has ABS brakes. Is there anyway I can look at Brake Master Cylinder and tell if my car has ABS brakes or not?

Thanks.
Old 11-12-2023, 08:48 AM
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924RACR
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The sure sign will be to trace the hard lines from the master to, if you have it, the ABS unit!

Dunno where exactly it was installed on these cars, but looks like this:
https://mtechniqueauto.com/shop/ols/...1-355-133-0103

Fun little vintage promo I stumbled across while looking for the pic...

Last edited by 924RACR; 11-12-2023 at 08:51 AM.
Old 11-12-2023, 09:03 AM
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931guru
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Check you paper options sticker (near the rear tire) for option 593. That is the option for ABS. Also, look for wheel speed sensors in the front spindle or the rear trailing arm.
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Old 11-12-2023, 10:04 AM
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secondchris
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Another easy check is to see if you have the ABS relay installed in the fuse/relay box. Or, just slam on the brakes and see what happens. It was an option in 87, not sure if it was standard in 88
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Old 11-12-2023, 11:55 PM
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jhowell371
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If you have ABS there will be an ABS light in the instrument cluster. .
Old 11-13-2023, 02:44 PM
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choupette.944
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Multiple signs can be looked for...

1. ABS light in the dash
2. Wires coming out of each wheel (be careful, there is also a wire for the pad wear sensor)
3. all brake lines that go to the ABS pump/assembly located under the wheel well cover on the passenger side

And of course, you can wait for snow or find a patch of gravel and slam the brakes!

Martin
Old 11-13-2023, 03:49 PM
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jeyjey
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> ABS pump/assembly located under the wheel well cover on the passenger side...

Right-hand side. (Driver's side over here.)
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Old 11-13-2023, 04:15 PM
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choupette.944
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Originally Posted by jeyjey
> ABS pump/assembly located under the wheel well cover on the passenger side...

Right-hand side. (Driver's side over here.)
Oops, didn't know that! So you are telling me that Right-hand driving cars are not just a mirror of the "normal" cars???

I just found out where it was located when I removed the wheel well cover to replace my fuel lines. I didn't really look for it but I was always wondering where those German engineers had located it... In my other cars, it has always been trivial to find. Almost always near the master cylinder.

Martin
Old 11-13-2023, 04:48 PM
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It's somewhat random what they mirrored and what they didn't. The brake booster location is *not* mirrored, and instead there's a shaft connected to the pedal that crosses the car under the dashboard.

Sadly, they didn't mirror the cabin air filter housing, so the steering column is in the way when you want to change it.
Old 11-13-2023, 04:55 PM
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choupette.944
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Originally Posted by jeyjey
It's somewhat random what they mirrored and what they didn't. The brake booster location is *not* mirrored, and instead there's a shaft connected to the pedal that crosses the car under the dashboard.

Sadly, they didn't mirror the cabin air filter housing, so the steering column is in the way when you want to change it.
Of course, it makes sense not to mirror everything, otherwise, you'll probably need double most of the parts. Imagine, you'll have 2 types of windshield washer tank, 2 types of intakes, etc, etc.

Adapting some component do make sense, but unfortunately some changes or not enough thought of as you depicted by your example.
Old 11-13-2023, 06:00 PM
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DSMblue
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Originally Posted by jeyjey
It's somewhat random what they mirrored and what they didn't. The brake booster location is *not* mirrored, and instead there's a shaft connected to the pedal that crosses the car under the dashboard.

Sadly, they didn't mirror the cabin air filter housing, so the steering column is in the way when you want to change it.
What cabin air filter housing? No 944's ever had cabin air filters as far as I am aware.
Old 11-13-2023, 06:53 PM
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Sorry, mixing up my cars. E36 M3.
Old 11-14-2023, 10:13 PM
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find a wet parking lot, slam on the brakes at 40 mph and try to turn....if you plow straight , you don't have abs
Old 11-14-2023, 11:29 PM
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Kurt R
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Here's the easiest way to learn if your car has ABS.
Open the hood. (bonnet)
Look for the chassis number, just in front of the battery.
Look at the brake lines right under the number.
If there are two lines, you don't have ABS. If there are three, you have ABS.



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Old 11-18-2023, 11:41 AM
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Raindrop
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Thanks to @Kurt R & @931guru I figured out that my car does not have ABS brakes.

Many system & parts were gutted out of my car. Brake sensors were ripped out, cruise control was disconnected and so on. So I was not sure if this car ever had an ABS brakes when it shipped from factory. Now I know.

Last edited by Raindrop; 11-18-2023 at 09:11 PM.



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