Need expert help? Reach out to us via live chat MON-SAT, 9AM to 5PM ET, for support. Our specialists are ready to assist you!

Please, add your first item to the wishlist

Need expert help? Reach out to us via live chat MON-SAT, 9AM to 5PM ET, for support. Our specialists are ready to assist you!

Please, add your first item to the wishlist

Select vehicle to confirm fitment

Brake Master Cylinder

PART#: 18M1878
ACDelco

$54.95

In stock

Fitments
YearMakeModelSubmodelEngineFuel TypePositionNote
1980JeepCherokeeWide Track Laredo4.2L6GASN/A
1980JeepCherokeeWide Track Golden Eagle4.2L6GASN/A
1980JeepCherokeeS4.2L6GASN/A
1980JeepCherokeeS5.9V8GASN/A
1980JeepCherokeeWide Track4.2L6GASN/A
1980JeepCherokeeWide Track Limited5.9V8GASN/A
1980JeepCherokeeBase5.9V8GASN/A
1980JeepCherokeeWide Track Laredo5.9V8GASN/A
1980JeepCherokeeWide Track5.9V8GASN/A
1980JeepCherokeeWide Track Chief4.2L6GASN/A
1980JeepCherokeeWide Track Chief5.9V8GASN/A
1980JeepCherokeeWide Track Golden Eagle5.9V8GASN/A
1980JeepCherokeeWide Track Limited4.2L6GASN/A
1980JeepCherokeeBase4.2L6GASN/A
1980JeepJ10Base4.2L6GASN/A
1980JeepJ10Base5.9V8GASN/A
1980JeepJ20Base5.9V8GASN/A
1980JeepWagoneerLimited4.2L6GASN/A
1980JeepWagoneerBase5.9V8GASN/A
1980JeepWagoneerLimited5.9V8GASN/A
1980JeepWagoneerBase4.2L6GASN/A
1980BuickElectraEstate Wagon4.9V8GASN/A
1980BuickElectraPark Avenue5.7V8GASN/A
1980BuickElectraLimited5.7V8GASN/A
1980BuickElectraEstate Wagon5.7V8DIESELN/A
1980BuickElectraEstate Wagon5.7V8GASN/A
1980BuickElectraPark Avenue5.7V8DIESELN/A
1980BuickElectraPark Avenue5.7V8GASN/A
1980BuickElectraLimited5.7V8GASN/A
1980BuickElectraLimited5.7V8DIESELN/A
1980BuickElectraLimited4.1V6GASN/A
1980BuickElectraEstate Wagon5.7V8GASN/A
1980BuickElectraPark Avenue4.1V6GASN/A
1980BuickLeSabreBase4.9V8GASN/A
1980BuickLeSabreBase5.7V8DIESELN/A
1980BuickLeSabreLimited4.1V6GASN/A
1980BuickLeSabreBase3.8V6GASN/A
1980BuickLeSabreLimited5.7V8GASN/A
1980BuickLeSabreLimited5.7V8GASN/A
1980BuickLeSabreLimited4.9V8GASN/A
1980BuickLeSabreBase5.7V8GASN/A
1980BuickLeSabreBase5.7V8GASN/A
1980BuickLeSabreLimited3.8V6GASN/A
1980BuickLeSabreBase4.1V6GASN/A
1980BuickLeSabreSport3.8V6GASN/A
1980BuickLeSabreLimited5.7V8DIESELN/A
1980BuickEstate WagonBase5.7V8GASN/A
1980BuickEstate WagonBase5.7V8DIESELN/A
1980BuickEstate WagonBase4.9V8GASN/A
1980BuickEstate WagonBase5.7V8GASN/A
1980CadillacCommercial ChassisBase6.0V8GASN/A
1980CadillacDeVilled'Elegance4.1V6GASN/A | 2-door; | 4-door;
1980CadillacDeVilleBase6.0V8GASN/A | 2-door; | 4-door;
1980CadillacDeVilled'Elegance5.7V8DIESELN/A | 2-door; | 4-door;
1980CadillacDeVilleCabriolet4.1V6GASN/A | 2-door; | 4-door;
1980CadillacDeVilled'Elegance6.0V8GASN/A | 2-door; | 4-door;
1980CadillacDeVilleBase4.1V6GASN/A | 2-door; | 4-door;
1980CadillacDeVilleCabriolet6.0V8GASN/A | 2-door; | 4-door;
1980CadillacDeVilleBase5.7V8DIESELN/A | 2-door; | 4-door;
1980CadillacDeVilleCabriolet5.7V8DIESELN/A | 2-door; | 4-door;
1980CadillacFleetwoodBrougham d'Elegance4.1V6GASN/A
1980CadillacFleetwoodFormal6.0V8GASN/A
1980CadillacFleetwoodBrougham d'Elegance6.0V8GASN/A
1980CadillacFleetwoodBase6.0V8GASN/A
1980CadillacFleetwoodBrougham d'Elegance5.7V8DIESELN/A
1980CadillacFleetwoodBrougham4.1V6GASN/A
1980CadillacFleetwoodBrougham6.0V8GASN/A
1980CadillacFleetwoodBrougham5.7V8DIESELN/A
1980ChevroletK5 BlazerCheyenne5.7V8GASN/A
1980ChevroletK5 BlazerCustom Deluxe4.1L6GASN/A
1980ChevroletK5 BlazerSilverado5.0V8GASN/A
1980ChevroletK5 BlazerCheyenne5.0V8GASN/A
1980ChevroletK5 BlazerCheyenne4.1L6GASN/A
1980ChevroletK5 BlazerCustom Deluxe5.7V8GASN/A
1980ChevroletK5 BlazerCustom Deluxe5.0V8GASN/A
1980ChevroletK5 BlazerSilverado5.7V8GASN/A
1980ChevroletK5 BlazerSilverado4.1L6GASN/A
1980ChevroletC10Big Ten5.0V8GASN/A
1980ChevroletC10Silverado5.7V8GASN/A
1980ChevroletC10Cheyenne5.7V8GASN/A
1980ChevroletC10Silverado5.7V8DIESELN/A
1980ChevroletC10Cheyenne4.1L6GASN/A
1980ChevroletC10Custom Deluxe4.1L6GASN/A
1980ChevroletC10Big Ten4.1L6GASN/A
1980ChevroletC10Cheyenne7.4V8GASN/A
1980ChevroletC10Cheyenne6.6V8GASN/A
1980ChevroletC10Big Ten5.7V8GASN/A
1980ChevroletC10Big Ten7.4V8GASN/A
1980ChevroletC10Cheyenne4.8L6GASN/A
1980ChevroletC10Custom Deluxe6.6V8GASN/A
1980ChevroletC10Custom Deluxe7.4V8GASN/A
1980ChevroletC10Scottsdale5.7V8DIESELN/A
1980ChevroletC10Scottsdale7.4V8GASN/A
1980ChevroletC10Custom Deluxe4.8L6GASN/A
1980ChevroletC10Silverado4.8L6GASN/A
1980ChevroletC10Cheyenne5.0V8GASN/A
1980ChevroletC10Custom Deluxe5.7V8GASN/A
1980ChevroletC10Custom Deluxe5.0V8GASN/A
1980ChevroletC10Scottsdale6.6V8GASN/A
1980ChevroletC10Scottsdale5.7V8GASN/A
1980ChevroletC10Scottsdale4.8L6GASN/A
1980ChevroletC10Silverado6.6V8GASN/A
1980ChevroletC10Cheyenne5.7V8DIESELN/A
1980ChevroletC10Silverado4.1L6GASN/A
1980ChevroletC10Silverado5.0V8GASN/A
1980ChevroletC10Scottsdale4.1L6GASN/A
1980ChevroletC10Silverado7.4V8GASN/A
1980ChevroletC10Big Ten6.6V8GASN/A
1980ChevroletC10Big Ten4.8L6GASN/A
1980ChevroletC10Custom Deluxe5.7V8DIESELN/A
1980ChevroletC10Scottsdale5.0V8GASN/A
1980ChevroletC10 SuburbanScottsdale5.7V8DIESELN/A
1980ChevroletC10 SuburbanCustom Deluxe5.7V8DIESELN/A
1980ChevroletC10 SuburbanSilverado5.7V8DIESELN/A
1980ChevroletCamaroBase5.7V8GASN/A
1980ChevroletCamaroRally Sport5.7V8GASN/A
1980ChevroletCamaroRally Sport4.4V8GASN/A
1980ChevroletCamaroBase4.4V8GASN/A
1980ChevroletCamaroBase5.0V8GASN/A
1980ChevroletCamaroBerlinetta5.0V8GASN/A
1980ChevroletCamaroBerlinetta3.8V6GASN/A
1980ChevroletCamaroRally Sport5.0V8GASN/A
1980ChevroletCamaroRally Sport3.8V6GASN/A
1980ChevroletCamaroRally Sport3.8V6GASN/A
1980ChevroletCamaroZ285.7V8GASN/A
1980ChevroletCamaroBase3.8V6GASN/A
1980ChevroletCamaroBerlinetta5.7V8GASN/A
1980ChevroletCamaroBerlinetta3.8V6GASN/A
1980ChevroletCamaroBerlinetta4.4V8GASN/A
1980ChevroletCamaroZ285.0V8GASN/A
1980ChevroletCamaroBase3.8V6GASN/A
1980ChevroletCapriceClassic3.8V6GASN/A
1980ChevroletCapriceClassic Sport5.0V8GASN/A
1980ChevroletCapriceClassic Sport3.8V6GASN/A
1980ChevroletCapriceClassic Landau3.8V6GASN/A
1980ChevroletCapriceClassic Sport4.4V8GASN/A
1980ChevroletCapriceClassic3.8V6GASN/A
1980ChevroletCapriceClassic Sport3.8V6GASN/A
1980ChevroletCapriceClassic Landau4.4V8GASN/A
1980ChevroletCapriceClassic Sport5.7V8GASN/A
1980ChevroletCapriceClassic Landau5.7V8GASN/A
1980ChevroletCapriceClassic Landau3.8V6GASN/A
1980ChevroletCapriceClassic5.7V8GASN/A
1980ChevroletCapriceClassic5.7V8DIESELN/A
1980ChevroletCapriceClassic5.0V8GASN/A
1980ChevroletCapriceClassic Landau5.7V8DIESELN/A
1980ChevroletCapriceClassic Landau5.0V8GASN/A
1980ChevroletCapriceClassic Sport5.7V8DIESELN/A
1980ChevroletCapriceClassic4.4V8GASN/A
1980ChevroletG10Sportvan5.7V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Chevy Van5.7V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Beauville5.0V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Beauville4.1L6GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Beauville5.7V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Chevy Van4.1L6GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Sportvan5.0V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Sportvan4.1L6GASN/Aw/ 11" X 2" Brakes
1980ChevroletG10Chevy Van5.0V8GASN/Aw/ 11" X 2" Brakes
1980ChevroletImpalaBase3.8V6GASN/A
1980ChevroletImpalaBase5.7V8DIESELN/A
1980ChevroletImpalaBase5.0V8GASN/A
1980ChevroletImpalaSport5.7V8GASN/A
1980ChevroletImpalaSport4.4V8GASN/A
1980ChevroletImpalaSport5.7V8DIESELN/A
1980ChevroletImpalaSport3.8V6GASN/A
1980ChevroletImpalaSport5.0V8GASN/A
1980ChevroletImpalaBase5.7V8GASN/A
1980ChevroletImpalaBase3.8V6GASN/A
1980ChevroletImpalaBase4.4V8GASN/A
1980ChevroletImpalaSport3.8V6GASN/A
1980ChevroletK10Scottsdale4.1L6GASN/A
1980ChevroletK10Cheyenne4.1L6GASN/A
1980ChevroletK10Cheyenne5.7V8GASN/A
1980ChevroletK10Custom Deluxe6.6V8GASN/A
1980ChevroletK10Custom Deluxe7.4V8GASN/A
1980ChevroletK10Custom Deluxe5.7V8GASN/A
1980ChevroletK10Scottsdale6.6V8GASN/A
1980ChevroletK10Silverado4.8L6GASN/A
1980ChevroletK10Silverado5.7V8GASN/A
1980ChevroletK10Cheyenne7.4V8GASN/A
1980ChevroletK10Silverado4.1L6GASN/A
1980ChevroletK10Scottsdale7.4V8GASN/A
1980ChevroletK10Custom Deluxe4.1L6GASN/A
1980ChevroletK10Scottsdale4.8L6GASN/A
1980ChevroletK10Cheyenne4.8L6GASN/A
1980ChevroletK10Silverado7.4V8GASN/A
1980ChevroletK10Cheyenne6.6V8GASN/A
1980ChevroletK10Custom Deluxe4.8L6GASN/A
1980ChevroletK10Scottsdale5.7V8GASN/A
1980ChevroletK10Silverado6.6V8GASN/A
1980GMCC1500Base5.7V8DIESELN/A
1980GMCC1500Sierra Classic4.1L6GASN/A
1980GMCC1500High Sierra7.4V8GASN/A
1980GMCC1500Base7.4V8GASN/A
1980GMCC1500Sierra Classic5.7V8DIESELN/A
1980GMCC1500High Sierra5.0V8GASN/A
1980GMCC1500Base5.7V8GASN/A
1980GMCC1500Sierra Grande5.7V8DIESELN/A
1980GMCC1500Sierra Classic4.8L6GASN/A
1980GMCC1500Base5.0V8GASN/A
1980GMCC1500Street Coupe5.7V8DIESELN/A
1980GMCC1500Sierra Grande7.4V8GASN/A
1980GMCC1500Base6.6V8GASN/A
1980GMCC1500Street Coupe5.0V8GASN/A
1980GMCC1500High Sierra4.1L6GASN/A
1980GMCC1500Street Coupe4.1L6GASN/A
1980GMCC1500Heavy Half5.7V8GASN/A
1980GMCC1500Street Coupe7.4V8GASN/A
1980GMCC1500Base4.1L6GASN/A
1980GMCC1500Sierra Classic5.7V8GASN/A
1980GMCC1500Sierra Classic5.0V8GASN/A
1980GMCC1500High Sierra6.6V8GASN/A
1980GMCC1500Sierra Grande6.6V8GASN/A
1980GMCC1500Sierra Grande4.1L6GASN/A
1980GMCC1500Sierra Grande5.7V8GASN/A
1980GMCC1500Street Coupe4.8L6GASN/A
1980GMCC1500Street Coupe6.6V8GASN/A
1980GMCC1500Heavy Half4.1L6GASN/A
1980GMCC1500Heavy Half5.0V8GASN/A
1980GMCC1500Heavy Half4.8L6GASN/A
1980GMCC1500High Sierra5.7V8GASN/A
1980GMCC1500Base4.8L6GASN/A
1980GMCC1500Sierra Classic6.6V8GASN/A
1980GMCC1500High Sierra4.8L6GASN/A
1980GMCC1500Sierra Classic7.4V8GASN/A
1980GMCC1500Sierra Grande5.0V8GASN/A
1980GMCC1500Sierra Grande4.8L6GASN/A
1980GMCC1500Street Coupe5.7V8GASN/A
1980GMCC1500High Sierra5.7V8DIESELN/A
1980GMCC1500Heavy Half6.6V8GASN/A
1980GMCC1500Heavy Half7.4V8GASN/A
1980GMCC1500 SuburbanBase5.7V8DIESELN/A
1980GMCC1500 SuburbanSierra Classic5.7V8DIESELN/A
1980GMCC1500 SuburbanSierra Grande5.7V8DIESELN/A
1980GMCC1500 SuburbanHigh Sierra5.7V8DIESELN/A
1980GMCG1500Rally5.0V8GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Rally4.1L6GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Rally STX5.7V8GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Rally STX5.0V8GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Vandura5.7V8GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Vandura4.1L6GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Rally5.7V8GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Rally STX4.1L6GASN/Aw/ 11" X 2" Brakes
1980GMCG1500Vandura5.0V8GASN/Aw/ 11" X 2" Brakes
1980GMCJimmySierra Grande4.1L6GASN/A
1980GMCJimmyStreet Coupe4.1L6GASN/A
1980GMCJimmySierra Classic5.7V8GASN/A
1980GMCJimmySierra Grande5.0V8GASN/A
1980GMCJimmyStreet Coupe5.7V8GASN/A
1980GMCJimmyHigh Sierra5.7V8GASN/A
Product info

The ACDelco Brake Master Cylinder part number 18M1878 is a reliable and durable replacement part for American Motors, Buick, Cadillac, and Checker vehicles. Its high-quality construction ensures optimal brake performance, providing a safe and comfortable driving experience.

This part is expertly engineered to meet or exceed industry standards, ensuring that it performs at its best for an extended period of time. Its precision-machined components ensure a perfect fit and smooth operation, while the high-quality materials used in its construction make it resistant to wear and tear.

The ACDelco Brake Master Cylinder part number 18M1878 features a compact and lightweight design, making it easy to install and maintain. Its smooth operation ensures accurate and consistent braking performance, providing drivers with complete control over their vehicle.

Whether you’re driving on the highway or in stop-and-go traffic, the ACDelco Brake Master Cylinder part number 18M1878 delivers reliable, consistent braking performance. It’s the perfect replacement part for anyone looking to restore their vehicle’s braking capabilities to like-new condition.

So if you’re in the market for a high-quality replacement brake master cylinder, look no further than the ACDelco Brake Master Cylinder part number 18M1878. With its superior construction and unbeatable performance, this part is sure to exceed your expectations and deliver a safe and comfortable driving experience.

About ACDelco

When it comes to top-notch auto parts, one brand that stands tall is ACDelco. Popular for its commitment to quality and innovation, ACDelco has been a trusted name in the automotive industry. At Newparts.com, we're proud to offer a wide selection of ACDelco auto parts, including ACDelco spark plugs, ACDelco alternators, and ACDelco air filters, and other ACDelco parts, all at discounted prices.

ACDelco spark plugs are engineered to deliver exceptional performance and reliability, ensuring optimal engine operation and fuel efficiency. Whether you're cruising down the highway or navigating city streets, you can trust ACDelco spark plugs to keep your engine firing on all cylinders.

When it comes to power generation, ACDelco alternators are second to none. Designed to withstand the challenges of daily driving, ACDelco alternators deliver consistent power output to keep your vehicle's electrical systems running smoothly. With ACDelco alternators from Newparts.com, you can count on reliable performance mile after mile.

In addition to spark plugs and alternators, we also offer a range of ACDelco air filters to help keep your engine breathing clean, fresh air. ACDelco air filters are designed to trap dirt, dust, and other contaminants, preventing them from entering your engine and causing damage. With a high-quality ACDelco air filter from Newparts.com, you can enjoy improved engine performance and extended engine life.

At Newparts.com, we understand that getting the right parts quickly is essential. That's why we offer fast shipping on all ACDelco auto parts, so you can get back on the road with confidence. Plus, with our discounted prices, you can save big on the parts you need to keep your vehicle running smoothly. In case you want to purchase parts by phone, feel free to call us at 855-505-2886 and our customer service team will help you out. 

Whether you're in need of spark plugs, alternators, air filters, or any other ACDelco auto parts, Newparts.com has you covered. Shop our selection today and experience the quality and reliability of ACDelco for yourself.

Specifications
New
Bleeder Hoses IncludedYes
Brake Booster IncludedNo
Master Cylinder Bore Diameter1.125
Master Cylinder Cap IncludedYes
Master Cylinder MaterialCast-Iron
Mounting Bracket IncludedNo
Mounting Hole Quantity2
Port Quantity2
Primary Outlet Thread Diameter0.5
Pushrod IncludedNo
Reservoir IncludedYes
Secondary Outlet Thread Diameter0.5625
Warranty
We offer a 2-year warranty on all parts that we sell. If the part fails within 2 years of purchase, please contact us for instructions to replace it. The warranty does not cover normal wear and tear or improper installation. On many parts, we also offer Extend product protection, which is a way to add up to 3 additional years for 5 total years of worry free coverage. Select your preferred term length and you're covered!
Delivery & Returns

Delivery Info

Newparts.com is your go to store for all parts and accessories at the best price and delivered quickly. Every order we ship receives a tracking number so that you can watch it all the way until it reaches your door. We only ship using the major shipping carriers like FedEx, UPS and USPS to ensure quick and safe delivery of your new car parts order.

Returns Info

Newparts.com offers a thirty (30) day return for refund for all items purchased through Newparts.com. To qualify for return and refund, all items must be new and in their original manufacturers box. To initiate a return, please contact our customer service. This information is only a summary. Complete shipping and return policy information can be found in our web site policies.

Free shipping Icon

FREE SHIPPING

Available on all kits, sets & Bison performance products