"affordable" brake booster option?

I think my brake booster on my 2000 4Runner is going out. I'm getting a hard pedal after startup, at low idles in parking lots, and pretty soon after I turn the vehicle off. I found some threads where people mentioned to check the vacuum line, check valve, and grommet for the valve. I've done all these and bought a new grommet with no change which leads me to think it's the booster going.

OEM is north of $1K and the Seiken people recommended is only available at a few places for just under $700. Is this the best option these days? I am hesitant to purchase a junkyard part as it's going to be just as old as mine and I hear the aftermarket options are junk as well.

The Seiken part number I found is W0133-1741918-SEK. One amazon listing says it replaces Toyota part number 44610-3D700. It doesn't help that it seems to only be sold mostly on amazon and ebay. I don't normally order parts there.

Some also say check/replace the master cylinder and gasket while I'm doing this swap. If I do that do people have a recommendation for that part as well?
 
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These only seem to fail in places like Az--I immediately thought you were in AZ when I saw this thread before even looking. You could do a used one from somewhere with a more mild climate through ebay or something, or try rockauto. My truck came from AZ and the shop put in some sort of aftermarket one which has been working great. I think the price on my invoice was $465 or so. Good luck!
 
I’ve been running a Cardone reman for about 5 years with performance equal or even superior to OEM. I may have gotten lucky, as some reviews will say the cardone units are junk.

But for $200, as long as you have a free and easy return policy, it might be worth a gamble to end up with a good one.

Other than that, the seiken is your best bet if you don’t want to fork out for OEM Toyota parts - which do seem a bit overpriced for this particular part.
 
Thanks to you both. I wonder why the AZ thing is an issue, just hot and dry causes cracking/leaking? I am leaning Seiken even though it's still $$$. I am a little concerned I may also need to replace the master cylinder in case there is a small leak that led to my original failing. I guess I won't know until I get in there. I will get a new gasket for the interface and start with the booster and hopefully that'll be all that's needed.
 
No need to replace the master pump.


I'd recommend try a used booster from a yard as it is way cheaper. Make sure before you pull it check whether it holds vacuum by pulling some vacuum from the tube going into the intake.
 
No need to replace the master pump.


I'd recommend try a used booster from a yard as it is way cheaper. Make sure before you pull it check whether it holds vacuum by pulling some vacuum from the tube going into the intake.

I am a little concerned with this option as the part will be as old as the one I'm replacing. I can get a used one for $100 and the Seiken is $630 plus tax right now (partsgeek is the best price I can find) so the used option is tempting.
 
Try Cityracerllc . com has brake boosters for 00-02 4Runners. Used one for my 100 and works fine Lots cheaper than dealer ($280) and new See Ih8mud forums
 
Try Cityracerllc . com has brake boosters for 00-02 4Runners. Used one for my 100 and works fine Lots cheaper than dealer ($280) and new See Ih8mud forums

Thanks for the tip but I didn't see any for 4Runners there. They don't mention the brand either. Maybe I'm overthinking this but there have been a lot of threads mentioning aftermarket boosters not lasting long or performing very well which is why I was leaning used OEM or new Seiken which I think is basically OEM.
 

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