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Please, add your first item to the wishlist

Select vehicle to confirm fitment

Brake Master Cylinder

PART#: 18M198
ACDelco

$44.29

In stock

Fitments
YearMakeModelSubmodelEngineFuel TypePositionNote
1988ChevroletMonte CarloBase4.3V6GASN/A
1988ChevroletMonte CarloLS5.0V8GASN/A
1988ChevroletMonte CarloLS4.3V6GASN/A
1988ChevroletMonte CarloBase5.0V8GASN/A
1988ChevroletMonte CarloSS5.0V8GASN/A
1988OldsmobileCutlass SupremeClassic Brougham5.0V8GASN/A | RWD;
1988OldsmobileCutlass SupremeClassic5.0V8GASN/A | RWD;
1988OldsmobileCutlass SupremeSL2.8V6GASN/A | RWD;
1988OldsmobileCutlass SupremeBase2.8V6GASN/A | RWD;
1988OldsmobileCutlass SupremeIndy 500 Pace Car2.8V6GASN/A | RWD;
1988OldsmobileCutlass SupremeInternational2.8V6GASN/A | RWD;
1987BuickRegalGNX3.8V6GASN/A
1987BuickRegalGrand National3.8V6GASN/A
1987BuickRegalLimited3.8V6GASN/A
1987BuickRegalBase5.0V8GASN/A
1987BuickRegalBase3.8V6GASN/A
1987BuickRegalLimited5.0V8GASN/A
1987ChevroletEl CaminoSS5.0V8GASN/A
1987ChevroletEl CaminoBase4.3V6GASN/A
1987ChevroletEl CaminoBase5.0V8GASN/A
1987ChevroletEl CaminoSS4.3V6GASN/A
1987ChevroletMonte CarloLS4.3V6GASN/A
1987ChevroletMonte CarloBase5.0V8GASN/A
1987ChevroletMonte CarloBase4.3V6GASN/A
1987ChevroletMonte CarloSS5.0V8GASN/A
1987ChevroletMonte CarloLS5.0V8GASN/A
1987GMCCaballeroBase4.3V6GASN/A
1987GMCCaballeroDiablo4.3V6GASN/A
1987GMCCaballeroBase5.0V8GASN/A
1987GMCCaballeroDiablo5.0V8GASN/A
1987OldsmobileCutlass SalonBase3.8V6GASN/A
1987OldsmobileCutlass SalonBase5.0V8GASN/A
1987OldsmobileCutlass SupremeBrougham5.0V8GASN/A
1987OldsmobileCutlass SupremeBrougham3.8V6GASN/A
1987OldsmobileCutlass SupremeBase5.0V8GASN/A
1987OldsmobileCutlass Supreme4423.8V6GASN/A
1987OldsmobileCutlass Supreme4425.0V8GASN/A
1987OldsmobileCutlass SupremeBase3.8V6GASN/A
1987PontiacGrand PrixBrougham3.8V6GASN/A
1987PontiacGrand PrixLE5.0V8GASN/A
1987PontiacGrand PrixBrougham4.3V6GASN/A
1987PontiacGrand PrixBase5.0V8GASN/A
1987PontiacGrand PrixBase4.3V6GASN/A
1987PontiacGrand PrixBase3.8V6GASN/A
1987PontiacGrand PrixLE3.8V6GASN/A
1987PontiacGrand PrixLE4.3V6GASN/A
1987PontiacGrand PrixBrougham5.0V8GASN/A
1986BuickRegalBase3.8V6GASN/A
1986BuickRegalGrand National3.8V6GASN/A
1986BuickRegalT-Type3.8V6GASN/A
1986BuickRegalLimited5.0V8GASN/A
1986BuickRegalBase5.0V8GASN/A
1986BuickRegalLimited3.8V6GASN/A
1986ChevroletEl CaminoBase5.0V8GASN/A
1986ChevroletEl CaminoConquista5.0V8GASN/A
1986ChevroletEl CaminoConquista4.3V6GASN/A
1986ChevroletEl CaminoSS5.0V8GASN/A
1986ChevroletEl CaminoSS4.3V6GASN/A
1986ChevroletEl CaminoBase4.3V6GASN/A
1986ChevroletMonte CarloLS5.0V8GASN/A
1986ChevroletMonte CarloLS4.3V6GASN/A
1986ChevroletMonte CarloBase5.0V8GASN/A
1986ChevroletMonte CarloBase4.3V6GASN/A
1986ChevroletMonte CarloSS5.0V8GASN/A
1986GMCCaballeroBase5.0V8GASN/A
1986GMCCaballeroDiablo4.3V6GASN/A
1986GMCCaballeroBase4.3V6GASN/A
1986GMCCaballeroAmarillo5.0V8GASN/A
1986GMCCaballeroDiablo5.0V8GASN/A
1986GMCCaballeroAmarillo4.3V6GASN/A
1986OldsmobileCutlass SalonBase5.0V8GASN/A
1986OldsmobileCutlass SalonBase3.8V6GASN/A
1986OldsmobileCutlass Salon4425.0V8GASN/A
1986OldsmobileCutlass SupremeBrougham5.0V8GASN/A
1986OldsmobileCutlass SupremeBrougham3.8V6GASN/A
1986OldsmobileCutlass SupremeBase3.8V6GASN/A
1986OldsmobileCutlass SupremeBase5.0V8GASN/A
1986PontiacBonnevilleLE3.8V6GASN/A
1986PontiacBonnevilleLE4.3V6GASN/A
1986PontiacBonnevilleBase3.8V6GASN/A
1986PontiacBonnevilleLE5.0V8GASN/A
1986PontiacBonnevilleBrougham5.0V8GASN/A
1986PontiacBonnevilleBrougham4.3V6GASN/A
1986PontiacBonnevilleBase5.0V8GASN/A
1986PontiacBonnevilleBase4.3V6GASN/A
1986PontiacBonnevilleBrougham3.8V6GASN/A
1986PontiacGrand PrixBase3.8V6GASN/A
1986PontiacGrand PrixBrougham3.8V6GASN/A
1986PontiacGrand PrixLE3.8V6GASN/A
1986PontiacGrand PrixLE4.3V6GASN/A
1986PontiacGrand PrixBrougham4.3V6GASN/A
1986PontiacGrand PrixBrougham5.0V8GASN/A
1986PontiacGrand PrixLE5.0V8GASN/A
1986PontiacGrand PrixBase4.3V6GASN/A
1986PontiacGrand PrixBase5.0V8GASN/A
1985BuickRegalBase3.8V6GASN/A | Naturally Aspirated;
1985BuickRegalLimited3.8V6GASN/A | Naturally Aspirated;
1985BuickRivieraBase5.0V8GASN/A | Rear: Drum;
1985BuickRivieraLuxury5.0V8GASN/A | Rear: Drum;
1985ChevroletEl CaminoBase5.0V8GASN/A
1985ChevroletEl CaminoConquista5.0V8GASN/A
1985ChevroletEl CaminoSS5.0V8GASN/A
1985ChevroletEl CaminoBase4.3V6GASN/A
1985ChevroletEl CaminoConquista4.3V6GASN/A
1985ChevroletEl CaminoSS4.3V6GASN/A
1985ChevroletMonte CarloBase4.3V6GASN/A
1985ChevroletMonte CarloSS5.0V8GASN/A
1985ChevroletMonte CarloBase5.0V8GASN/A
1985GMCCaballeroBase5.0V8GASN/A
1985GMCCaballeroAmarillo4.3V6GASN/A
1985GMCCaballeroBase4.3V6GASN/A
1985GMCCaballeroAmarillo5.0V8GASN/A
1985GMCCaballeroDiablo5.0V8GASN/A
1985GMCCaballeroDiablo4.3V6GASN/A
1985OldsmobileCutlass SupremeBase3.8V6GASN/A
1985OldsmobileCutlass SupremeBrougham5.0V8GASN/A
1985OldsmobileCutlass SupremeLS3.8V6GASN/A
1985OldsmobileCutlass SupremeBase5.0V8GASN/A
1985OldsmobileCutlass SupremeBrougham3.8V6GASN/A
1985OldsmobileCutlass SupremeLS5.0V8GASN/A
1985PontiacBonnevilleBrougham3.8V6GASN/A
1985PontiacBonnevilleLE5.0V8GASN/A
1985PontiacBonnevilleBrougham5.0V8GASN/A
1985PontiacBonnevilleBase3.8V6GASN/A
1985PontiacBonnevilleBase5.0V8GASN/A
1985PontiacBonnevilleLE3.8V6GASN/A
1985PontiacGrand PrixBase3.8V6GASN/A
1985PontiacGrand PrixLE3.8V6GASN/A
1985PontiacGrand PrixBrougham5.0V8GASN/A
1985PontiacGrand PrixBase5.0V8GASN/A
1985PontiacGrand PrixLE5.0V8GASN/A
1985PontiacGrand PrixBrougham3.8V6GASN/A
1984BuickRegalLimited4.1V6GASN/A
1984BuickRegalLimited3.8V6GASN/A | Naturally Aspirated;
1984BuickRegalBase3.8V6GASN/A | Naturally Aspirated;
1984BuickRegalBase4.1V6GASN/A
1984BuickRivieraLuxury5.0V8GASN/A | Rear: Drum;
1984BuickRivieraLuxury4.1V6GASN/A | Rear: Drum;
1984BuickRivieraBase4.1V6GASN/A | Rear: Drum;
1984BuickRivieraLuxury5.7V8DIESELN/Aw/ Vacuum Booster
1984BuickRivieraBase5.0V8GASN/A | Rear: Drum;
1984BuickRivieraBase5.7V8DIESELN/Aw/ Vacuum Booster
1984ChevroletEl CaminoBase3.8V6GASN/A
1984ChevroletEl CaminoConquista5.0V8GASN/A
1984ChevroletEl CaminoConquista3.8V6GASN/A
1984ChevroletEl CaminoBase3.8V6GASN/A
1984ChevroletEl CaminoConquista3.8V6GASN/A
1984ChevroletEl CaminoSS3.8V6GASN/A
1984ChevroletEl CaminoSS3.8V6GASN/A
1984ChevroletEl CaminoBase5.0V8GASN/A
1984ChevroletEl CaminoSS5.0V8GASN/A
1984ChevroletMonte CarloBase3.8V6GASN/A
1984ChevroletMonte CarloSS5.0V8GASN/A
1984ChevroletMonte CarloBase3.8V6GASN/A
1984ChevroletMonte CarloBase5.0V8GASN/A
1984GMCCaballeroBase3.8V6GASN/A
1984GMCCaballeroBase5.0V8GASN/A
1984GMCCaballeroDiablo3.8V6GASN/A
1984GMCCaballeroBase3.8V6GASN/A
1984GMCCaballeroAmarillo3.8V6GASN/A
1984GMCCaballeroAmarillo5.0V8GASN/A
1984GMCCaballeroDiablo5.0V8GASN/A
1984GMCCaballeroDiablo3.8V6GASN/A
1984OldsmobileCutlass CalaisHurst5.0V8GASN/A
1984OldsmobileCutlass CalaisBase5.0V8GASN/A
1984OldsmobileCutlass CalaisBase3.8V6GASN/A
1984OldsmobileCutlass SupremeBrougham5.0V8GASN/A
1984OldsmobileCutlass SupremeBrougham3.8V6GASN/A
1984OldsmobileCutlass SupremeBase5.0V8GASN/A
1984OldsmobileCutlass SupremeBase3.8V6GASN/A
1984PontiacBonnevilleBrougham3.8V6GASN/A
1984PontiacBonnevilleBase5.0V8GASN/A
1984PontiacBonnevilleBase3.8V6GASN/A
1984PontiacBonnevilleLE3.8V6GASN/A
1984PontiacBonnevilleBrougham5.0V8GASN/A
1984PontiacBonnevilleLE5.0V8GASN/A
1984PontiacGrand PrixBrougham5.0V8GASN/A
1984PontiacGrand PrixLE3.8V6GASN/A
1984PontiacGrand PrixBase3.8V6GASN/A
1984PontiacGrand PrixBrougham3.8V6GASN/A
1984PontiacGrand PrixLE5.0V8GASN/A
1984PontiacGrand PrixBase5.0V8GASN/A
1983BuickRegalBase3.8V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalLimited4.1V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalBase5.7V8DIESELN/AExcept Vehicles Built For United States Market
1983BuickRegalBase4.3V6DIESELN/AExcept Vehicles Built For United States Market
1983BuickRegalLimited4.3V6DIESELN/AExcept Vehicles Built For United States Market
1983BuickRegalT-Type3.8V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalLimited3.8V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalBase4.1V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalLimited5.7V8DIESELN/AExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon4.1V6GASN/AExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon5.7V8DIESELN/AExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon3.8V6GASN/AExcept Vehicles Built For United States Market
1983BuickRivieraT-Type3.8V6GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraBase5.7V8DIESELN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraBase4.1V6GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraXX Anniversary Edition5.7V8DIESELN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraLuxury5.0V8GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraXX Anniversary Edition4.1V6GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraBase5.0V8GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraLuxury5.7V8DIESELN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraLuxury4.1V6GASN/AVehicles Built For United States Market | Rear: Drum;
1983BuickRivieraXX Anniversary Edition5.0V8GASN/AVehicles Built For United States Market | Rear: Drum;
1983ChevroletEl CaminoSS3.8V6GASN/A
1983ChevroletEl CaminoBase3.8V6GASN/A
1983ChevroletEl CaminoBase3.8V6GASN/A
1983ChevroletEl CaminoBase5.0V8GASN/A
1983ChevroletEl CaminoConquista3.8V6GASN/A
1983ChevroletEl CaminoConquista5.0V8GASN/A
1983ChevroletEl CaminoSS3.8V6GASN/A
1983ChevroletEl CaminoConquista3.8V6GASN/A
1983ChevroletEl CaminoSS5.0V8GASN/A
1983ChevroletMonte CarloSS5.0V8GASN/A
1983ChevroletMonte CarloBase5.0V8GASN/A
1983ChevroletMonte CarloBase3.8V6GASN/A
1983ChevroletMonte CarloCL3.8V6GASN/A
1983ChevroletMonte CarloCL3.8V6GASN/A
1983ChevroletMonte CarloCL5.0V8GASN/A
1983ChevroletMonte CarloBase3.8V6GASN/A
1983GMCCaballeroAmarillo3.8V6GASN/A
1983GMCCaballeroDiablo3.8V6GASN/A
1983GMCCaballeroBase5.0V8GASN/A
1983GMCCaballeroDiablo5.0V8GASN/A
1983GMCCaballeroDiablo3.8V6GASN/A
1983GMCCaballeroBase3.8V6GASN/A
1983GMCCaballeroAmarillo5.0V8GASN/A
1983GMCCaballeroBase3.8V6GASN/A
1983GMCCaballeroAmarillo3.8V6GASN/A
1983OldsmobileCutlass CalaisBase5.0V8GASN/A
1983OldsmobileCutlass CalaisHurst3.8V6GASN/A
1983OldsmobileCutlass CalaisHurst5.0V8GASN/A
1983OldsmobileCutlass CalaisBase3.8V6GASN/A
1983OldsmobileCutlass SupremeBrougham3.8V6GASN/A
1983OldsmobileCutlass SupremeBrougham5.0V8GASN/A
1983OldsmobileCutlass SupremeBase5.0V8GASN/A
1983PontiacBonnevilleBase3.8V6GASN/A
1983PontiacBonnevilleBrougham3.8V6GASN/A
1983PontiacBonnevilleBase5.0V8GASN/A
1983PontiacBonnevilleBrougham5.0V8GASN/A
1983PontiacGrand PrixBase5.0V8GASN/A
1983PontiacGrand PrixBrougham3.8V6GASN/A
1983PontiacGrand PrixLJ5.0V8GASN/A
1983PontiacGrand PrixBase3.8V6GASN/A
1983PontiacGrand PrixBrougham5.0V8GASN/A
1983PontiacGrand PrixLJ3.8V6GASN/A
Product info

The ACDelco Brake Master Cylinder part number 18M198 is an essential component for ensuring optimal braking performance in Buick, Chevrolet, GMC, and Oldsmobile vehicles. This high-quality replacement part is designed to meet or exceed OEM specifications and offers a range of benefits and features that make it an excellent choice for car owners.

One of the key benefits of the ACDelco Brake Master Cylinder is its durable construction. Made from high-quality materials, this component is built to withstand the rigors of daily use and provide reliable performance over the long term. Its rugged design also ensures that it can handle the high-pressure demands of modern braking systems.

In addition to its durability, the ACDelco Brake Master Cylinder also offers exceptional precision and control. Its advanced design allows for precise modulation of braking pressure, which helps to improve overall stopping performance and reduce the risk of skidding or loss of control. This level of control is especially important in emergency situations, where every second counts.

Finally, the ACDelco Brake Master Cylinder is incredibly easy to install, making it a great choice for DIYers and professional mechanics alike. With its straightforward design and clear instructions, this component can be installed quickly and easily, without the need for specialized tools or equipment.

Overall, the ACDelco Brake Master Cylinder part number 18M198 is an excellent choice for anyone looking to improve the performance and reliability of their vehicle’s braking system. Whether you’re a professional mechanic or a DIYer, this component offers the durability, precision, and ease of installation you need to get the job done right.

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 Diameter0.9448818898
Master Cylinder Cap IncludedYes
Master Cylinder MaterialAluminum
Mounting Bracket IncludedNo
Mounting Hole Quantity2
Port Quantity2
Primary Outlet Thread Diameter0.5625
Pushrod IncludedNo
Reservoir IncludedYes
Secondary Outlet Thread Diameter0.5
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.

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