ARES 18002-50.7mm Master Cylinder Adapter - Use with Most Imported and Some Domestic Vehicles - Use with Brake Fluid Bleeders
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FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 3 left in stock, order soon!
Arrives
Wednesday, Nov 12
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Size: 50.7mm Master Cylinder Adapter
Features
- SPECIFICATIONS: This Master Cylinder Adapter has an internal diameter of 50.7mm and an external diameter of 57mm. Designed to fit master cylinder necks with tab-lock designs, this adapter features a three-tab lock design that secures the adapter to the master cylinder.
- DESIGN: This Master Cylinder Adapter is designed let you easily remove and refill fluid into your entire brake system. This adapter cap is exclusively compatible with our ARES 70921 2L Manual Brake Fluid Bleeder, ARES 18051 - 4L Manual Fluid Pressure Bleeder, and ARES 18053 - 4L Manual Fluid Pressure Bleeder and 1L Reservoir Bottle.
- APPLICATIONS: This adapter is compatible with Hyundai, compatible with Mitsubishi, compatible with Nissan, compatible with Subaru, compatible with some Chrysler and compatible with Dodge, and compatible with some Ford and compatible with Lincoln. Note: To ensure this cap will fit your vehicle, we recommend measuring your brake bleeder opening or consulting your vehicle's manual to confirm the size you need.
- RELIABLE | EFFECTIVE | EFFICIENT: Users trust ARES to be quality tools. You are backed by our Performance Assurance Limited Lifetime Warranty. If you have any issues with your ARES Master Cylinder Adapter, simply contact customer service for troubleshooting help, parts, replacement, or refund.
- ASPCA BUSINESS AMBASSADOR: We are proud to be part of the ASPCA Business Ambassador Program. If you have a pet, you realize they are more than a pet, they are part of the family. With your support, were proud to help this great organization.
Manufacturer: ARES
Brand: ARES
Item Weight: 1.44 ounces
Product Dimensions: 4.2 x 4 x 2 inches
Item model number: 69969
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 69969
Date First Available: April 26, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Nov 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Summary: pros: -- one person affordable brake system flush finally -- it actually works, not most of the time, but so far every time. -- good for occasional use, unlike commercial expensive units which retain too much fluid and therefore lead to waste or worse, use of water contaminated brake fluid. -- connectors and adapters are high quality cons: -- it is slower than the very expensive commercial units -- In my opinion, this tool would not hold up in a commercial garage in daily use. The air pump part doesn't seem particularly durable. OTOH, you can buy several of these for the price of one commercial unit. -- For some reason, Ares is very unhelpful in determining which cap to use for reservoirs. -- I managed to read enough hints on the web to correctly guess what I needed to buy (in my case, 2005 F150 and 7.3L F350 (after 2000), both use the Ares 18002-50.7mm adapter. Probably works on many other vehicles, but you will just have to measure the reservoir and count the tabs, and hope you guess right). -- you get to print the manual from the website, directions are not included (at least, not with my tool). Finally a tool that is both reasonably priced and allows one person brake fluid flushes. I have use the "helper" method, and the "vacuum bleeder" methods-- helper, you need another person, OK for something simple like a caliper replace but consumes a lot of the helper's time for a system bleed. I have had poor luck with the vacuum bleeders, because the bleeder screws allow air to leak past the threads so I can't tell if the system is air free (yes, I've used all the usual methods in an attempt to seal the threads: teflon tape, teflon thread goop, heavy grease, silicone grease, stack of o-rings... best I can manage is 25% success. Not good enough, I use the vacuum bleeder now to pull fluid out of the reservoir now, works great for that). The Ares tool attaches to the brake reservoir, and once filled and pumped up it replaces fluid that flows out when the brake bleeder is opened. Finally, a way that actually reliably works for one person brake bleeding-- particularly useful for doing a brake system flush. But... there is a learning curve. Here are some hints: -- wear safety glasses-- if you disconnect this tool with pressure still in the container, brake fluid will spray out. Bad enough on skin, don't want brake fluid in your eyes. -- as the manual notes, check the level in the tool periodically, as you do not want to get air in the system if the Ares tank runs dry and the reservoir then empties-- why? for too many vehicles this means a difficult/complicated process of bleeding the ABS hydraulic components. Don't go there. -- I wrapped some pig blankets around the reservoir just in case there was spillage-- did not happen, but I don't want brake fluid spilling on anything, particularly painted surfaces. I did find that there is significant leakage from the disconnected reservoir adapter/tubing, the pig blankets worked well for that. -- when I first set this up, the air bleeder leaked (this is the button to press to let out air pressure prior to disconnecting tool from vehicle). It is a threaded gadget with a spring, just tighten the silver button part. No hint from the sparse manual, I guess you figure this out on your own. Disconcerting to hear that tell tale hissing when pumping up the Ares, I was thinking "defective" but this was not the case. -- Be sure the brake fluid reservoir is not at max level. Each time this tool is used, including when adding more fluid to the Ares tool tank, somewhat more brake fluid ends up in the vehicle reservoir; I started at max level and had to remove some brake fluid from the vehicle reservoir because the reservoir went over max level. -- in a similar vein... if you are doing a vehicle flush suck out the old reservoir fluid and add fresh fluid, just don't need to spend time flushing the reservoir fluid AND the lines for the first caliper. Yes, obvious, until you just connected and pumped up your new toy and realize... yes... forgot this step. -- you need a more or less flat surface near the brake reservoir to set the Ares tool. For my first use, one truck had a convenient battery, other one I used a piece of plywood on top of the engine. I did not want to get fluid on the air valve if the Ares pitched over on its side (might spray out some brake fluid when relieving pressure). -- the silicone tubing seems to be 5mm ID x 8mm OD, which also works well as bleeder hose -- I found that the bleeding rate was slow enough, that at the end of the process for flushing the brakes, I could allow the Ares to just flush out the balance of the fluid into the brake system and last bleeder, allowing some air into the reservoir to reduce the level somewhat below max-- enough time to get to the bleeder and close it before too much fluid was pumped from the reservoir. I was using about 15psi on the Ares gauge. -- If the Ares brake bleeder tool is only occasionally used, have isopropyl alcohol on had for flushing. Otherwise the old brake fluid sits there soaking up water for ages, potentially contaminating your next brake bleeding. (method: pump out all the DOT3 in tank by using the air pump on the unit and directing waste fluid into waste receptacle, add the isopropyl (I used 99% anhydrous, so that it evaporates out faster, but this adds to the cost vs. cheap local store bought 70% isopropyl), swish around to get to all the DOT3, then pump the fluid out into waste receptacle. Allow to air dry before capping reservoir. Store out of sunlight, the Ares tank is susceptible to UV degradation over long periods of time (as the "manual" implies). I like this tool.
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Reviewed in the United States on October 4, 2020 by Roncalli
I am amazed. I bought something on Amazon and it actually does what it says it will do, is not a piece of crap, and it got to me on time - definitely not the usual result of an Amazon purchase. The device is absurdly easy to use, does not leak, the cap fits the master cylinder in my car, and best of all it just plain WORKS. Pump it up, put tubing on the bleeder, open the bleeder just a turn or so, and watch the old fluid come out. The device holds at least 3 quarts of fluid. When you are done, push the silver pressure relief valve, hold it for about 15 seconds, and you can remove the cap and reinstall your original master cylinder cap. The only drawback that I found with the item is that it will not work on the old style metal master cylinders with the double square metal covers that are held down with stiff wire bales. It requires that the car have a plastic master cylinder with a round threaded plastic cover. My 1987 Caddilac Allante does and I was able to bleed the master cylinder, ABS accumulator and ABS pump in under 30 minutes. Then I popped the hood on my 1978 Eldorado and discovered the situation with the metal master cylinder. No biggie, I built an adapter from an old cylinder top, but something to be aware of. I believe almost all cars form 1980 or so on will be fine for this tool.
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Reviewed in the United States on September 8, 2018 by Kindle Customer
Size: 55mm Master Cylinder Adapter
I used on a 2020 Honda Odyssey, and it was flawless. I read so many posts about not holding a seal, spills etc. This part held the vacuum like an absolute champ.
Reviewed in the United States on July 13, 2025 by Pierre El Capitan de Castanets Enimigo
I bought the "bong" style, hand pump model and it's definitely well-made. The main pump mechanism is metal, the body is thick, sturdy plastic, the base is a thick piece of rubber. overall, just really well-made. But it has an annoying issue. When i took it out to use for the second time, it wouldn't hold any pressure. Air was coming back up through the pump cylinder. With some effort I unscrewed the pump and disassembled it. See now, the one-way valve is a little piece of rubber that sticks through a hole into the base if the cylinder. WELL, this piece of rubber had been pushed out of the hole, breaking the seal. All i had to do is reseat the little bugger and it worked perfectly. the design flaw is that i think this will happen again and again. Note: tighten the pressure release valve too. Mine leaked air when I first used it. Actually using the thing is great--if you have the proper adapter for your car!! They dont make it easy to look up which adapter will work for your model year. The default one is too big for my 2004 Grand Cherokee, but I zip-tied it to the reservoir tightly enough for it to work fine. The way this works is you drain your reservoir until there's juuuust a little at the bottom then fill it up to the max line with fresh fluid. Then attach the adapter to the hose and pump until the fluid reaches the end if the hose, remove the adapter and attach it to the reservoir tightly, then attach the hose again. this removes air from the hose (like a syringe). Pump up the pressure to 10-15PSI and as you drain fluid, this device automatically replaces it, keeping it at the max level line. note: if there is an air leak, the reservoir will overfill. Separately, I bought the Subaru adapter. EXPENSIVE! But again, very well made. Fit perfectly and tightly on my 2012 and 2013 Subarus. I took off one star for poor adapter selection and occassional minor maintenance requirements. Really, overall I'm impressed with the build quality, and with the right adapter it just works. Again, this is for the "bong" looking model.
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Reviewed in the United States on February 21, 2021 by Max