Master Cylinder - New
Hover over the image to zoom in
Master Cylinder - New Master Cylinder - New
Share this:

Carquest Wearever Master Cylinder - New

Part No. MCA630334 Warranty Details  
Quantity  Add to Cart

See if this part fits a specific vehicle.

Check Vehicle Fit

Assemblies match what was originally installed on the car from OE for quality, fit, function and material.

Product Features:
  • Rubber components independently tested and certified by approved labs globally to meet extreme (hi and low) temperatures.
  • Master cylinders use correct EPDM rubber for DOT3, 4 and 5 brake fluids
  • All aluminum castings are "hard anodized"
  • All iron castings are coated to prevent rust
  • Manufacturers all major components in house.
  • Most brake masters ship with OE size/shape reservoirs, floats, switches, sensors and valves to match original OE assembly
  • All machining done by computer programmed CNC machines
  • Castings go through 2 inspection processes (via micrometer and via go-no go fixture check) before being sent to the assembly department insuring all machining is correct and matches the OE
  • Before assembly all castings and components are cleaned by automated ultrasonic cleaning machines
  • Assembly is done in clean room insuring no contamination is introduced into final assembly
  • All assemblies are dated coded for 100% accurate trace-ability
  • Every assembly is pressure tested before being shipped insuring dependable operation and leak-free performance
Back To Top
Installation Hardware Included:No
Reservoir Type:Single
Reservoir Material:Plastic
Reservoir Included:Yes
Master Cylinder Color/Finish:Gray
Secondary Port Size:1/2 x 20
Primary Port Size:1/2 x 20
Package Contents:Master Cylinder
Pedal Rod Included:No
Bore Diameter (N):1.456"
Mounting Hole Quantity:2
Master Cylinder Material:Aluminum
Product Condition:New
Port Count:2


by PowerReviews
Carquest WeareverMaster Cylinder - New

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

Displaying reviews 1-3

Back to top


Worked out great ! !


from Wentworth nh

Verified Buyer

Comments about Carquest Wearever Master Cylinder - New:

Was a direct fit on my 2005 Silverado 2500 hd had the bench blended plugs included , woke up my brakes would buy again !!

  • Was this a gift?:
  • No

i would buy here again


from va.

Verified Buyer

Comments about Carquest Wearever Master Cylinder - New:

it was a new part . worked very well and got my problem fixed and saved me money

  • Was this a gift?:
  • No

(3 of 8 customers found this review helpful)


So far so good


from Rochester new york

About Me Truck Enthusiast

Verified Buyer
Helpful Reviewer


  • Easy Instructions
  • Easy To Install


    Best Uses

      Comments about Carquest Wearever Master Cylinder - New:

      Too early to tell if it will last like OEM master cyl

      Displaying reviews 1-3

      Back to top

      Do you have questions about this product?


      Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

      3 Questions | 4 Answers
      Displaying questions 1-3
      • Q:

        how to install master cylinda
        Asked on 2/6/2016 by smittyboy from westport, ma

        1 answer



          Hi Smittyboy! Since you didn't mention the specific vehicle, it's hard to tell for sure. To give you the correct information I would need the year, make, model and engine size of the vehicle.

          Answered on 2/7/2016 by Solomon from AAP
      • Q:

        which side is the front brake outlet and which side is the rear brake outlet on this master cylinder.
        Asked on 3/1/2014 by Brian from Fort Hill, PA

        1 answer



          It's a good question, Brian! I'm glad to assist you! The port closest to the firewall is for the front brakes and the other for the rear.

          Answered on 3/4/2014 by Steve from AAP
      • Q:

        what is the part the master cyl bolts to? power steering lines flow in and out of this part. it also has a small silver compressed gas thing on it.
        Asked on 10/24/2009 by john from nc

        2 answers



          In order to provide you with accurate information, we will need some vehicle information. To better assist you, we request that you contact us at 1-877-ADVANCE.

          Answered on 10/31/2009 by Rob from Advance Auto Parts
        • A:

          It's a HydroScrotum

          Answered on 5/4/2010 by Rod from Bungstown, USA
      Displaying questions 1-3

      Do you have a question about this product? 

      Check out the specials in our monthly flyer.
      Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.