Best Master Cylinder Caps in 2026
Daisy
Last Updated: Feb 9, 2026
Daisy
Last Updated: Feb 9, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder reservoir cap gasket is designed to match the fit and function of the original gasket on specified vehicles
Restores functionality - this gasket is made to fit and fully restore part functionality after the original gasket fails
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Precise replacement - cylinder housing is constructed to match the casting material of the original part and ensure similar performance
Durable design - all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid
100% new - made entirely of new materials, not remanufactured, to ensure highest quality and safety
Strict specifications - made to meet rigorous SAE International standards
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder reservoir cap gasket is designed to match the fit and function of the original gasket on specified vehicles
Restores functionality - this gasket is made to fit and fully restore part functionality after the original gasket fails
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Product Type:Auto Part
Item Package Weight:0.022 Pounds
Item Package Dimension:7.111 cm L X7.62 cm W X3.048 cm H
Country Of Origin: China
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder cap is designed to match the fit and function of the original cap on specified vehicles
Restores functionality - reliable replacement for an original part that is missing or failed due to fatigue
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
Pressure tested to ensure safe and confident braking
Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear
Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
Pressure tested to ensure safe and confident braking
Cast iron and aluminum specifications provide no extra stress on the brake boosting mounting
Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder cap is designed to match the fit and function of the original cap on specified vehicles
Restores functionality - reliable replacement for an original part that is missing or failed due to fatigue
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder reservoir cap gasket is designed to match the fit and function of the original gasket on specified vehicles
Restores functionality - this gasket is made to fit and fully restore part functionality after the original gasket fails
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| PremiumpartsWhosale | 9.97 | ❌ | ❌ | ❌ |
[Vehicle Fitment]: Compatible with Ford F-150 2010-2013, Expedition 2010-2014; Compatible with Lincoln Navigator 2010-2014
[Reference Number]: M630711, 134398, AL3Z2140A, BL3Z2140A, AL3Z 2140-A, BL1Z 2140-A, BL3Z 2140-A, DL1Z2140A, DL1Z2140B, DL1Z2140C, DL3Z2140A. Please enter your vehicle information in the top left corner of listing and check our "Special Note" before ordering
[Package Contents]: ①1x Brake Master Cylinder; ②1x Removable Reservoir; ③Sensor Included: Yes; ④Packaging Type: Box
[Specifications]: ①Condition: New; ②Material: Aluminum Alloys 101; ③Bore Diameter: 1.1875 Inch, 1.375 Inch; ④Rearward Outlet Size: M14 x 1.5; ⑤Forward Outlet Size: M12 x 1.5
[Customer Support]: 1 Year Unlimited-mileage Quality Guarantee; Being brand-new and sturdy, this Brake Master Cylinder Assembly is the ideal choice for direct replacement. We extremely value your satisfaction and strive to provide you good shopping experience. Any further question, please feel free to contact us at any time.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OnePrime Direct | 9.70 | ❌ | ❌ | ❌ |
Fits most GM application
Dual Hump Caps
With a 1" bore
The cap is attached by 2 small screws
9/16" and 1/2" ports on both sides of the master cylinder
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement - this brake master cylinder cap is designed to match the fit and function of the original cap on specified vehicles
Restores functionality - reliable replacement for an original part that is missing or failed due to fatigue
Durable construction - this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| high-peaks-automotive | 6.30 | ❌ | ❌ | ❌ |
Radiator Cap is designed to provide increased durability and can be removed without damage to the rubber atmospheric seal
This radiator cap has pressure valve springs made of stainless steel to maintain the calibrated pressure for maximum service life
It has shipping options to quickly meet every need, including same-day shipping for orders placed as late as 8 p m
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Precise replacement - cylinder housing is constructed to match the casting material of the original part and ensure similar performance
Durable design - all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid
100% new - made entirely of new materials, not remanufactured, to ensure highest quality and safety
Strict specifications - made to meet rigorous SAE International standards
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Precise replacement - cylinder housing is constructed to match the casting material of the original part and ensure similar performance
Durable design - all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid
100% new - made entirely of new materials, not remanufactured, to ensure highest quality and safety
Strict specifications - made to meet rigorous SAE International standards
Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Dorman | 10 |
| A-Premium | 1 |
| Acdelco | 1 |
| Crown Auto | 1 |
| Demotor Performance | 1 |
We've carried out a comprehensive analysis of 842 reviews on master cylinder caps, using our selection criteria to identify the best options in the automotive replacement parts. Our findings reveal that most customers typically select master cylinder caps priced around $34.74, with top brands including demotor performance, toyota, lexus, dorman, gm, a-premium and acdelco and haotom
Our team of expert editors reviewed these high-quality items and handpicked the top 14 master cylinder caps for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the automotive replacement parts category. These include oneprime direct, authentic tokyo, afn auto, amazon.com, hga performance and premiumpartswhosale and haotom .
We are dedicated to assisting our users in finding the right parts Products based on their needs, saving them considerable time when choosing which master cylinder caps to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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