--- product_id: 443668600 title: "ACDelco 18M1878 Professional Brake Master Cylinder Assembly" brand: "acdelco" price: "979.28 DT" currency: TND in_stock: true reviews_count: 5 category: "Ac Delco" url: https://www.desertcart.tn/products/443668600-acdelco-18m1878-professional-brake-master-cylinder-assembly store_origin: TN region: Tunisia --- # Geometrical tolerance Pressure tested Cast iron & aluminum ACDelco 18M1878 Professional Brake Master Cylinder Assembly **Brand:** acdelco **Price:** 979.28 DT **Availability:** ✅ In Stock ## Summary > 🚗 Drive with Confidence: Your Safety is Our Priority! ## Quick Answers - **What is this?** ACDelco 18M1878 Professional Brake Master Cylinder Assembly by acdelco - **How much does it cost?** 979.28 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/443668600-acdelco-18m1878-professional-brake-master-cylinder-assembly) ## Best For - acdelco enthusiasts ## Why This Product - Trusted acdelco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Perfect Fit:** Geometrical tolerance ensures seamless integration with your vehicle. - • **Safety First:** Pressure tested for safe and confident braking every time. - • **Durable Design:** Crafted from cast iron and aluminum to minimize stress on mounting. - • **Brake Drag Prevention:** Innovative piston assembly and return spring reduce premature wear. - • **Unmatched Reliability:** Meets SAE J1153 & J1154 standards for top-notch performance. ## Overview The ACDelco 18M1878 Professional Brake Master Cylinder Assembly is engineered to meet rigorous SAE J1153 and J1154 performance standards, ensuring reliability and safety. With a robust design featuring cast iron and aluminum, this assembly minimizes stress on brake boosting mounts while its geometrical tolerance guarantees a perfect fit. The pressure-tested unit includes a piston assembly and return spring to prevent brake drag, extending the life of your brake pads. ## Description New Master Cylinder Review: Le service est excellent et rapide - Cette pièce était nécessaire pour moi ,, car cette pièce sert a appliqué les freins d'un véhicule, les prix est excellent, la piece est complètement neuve et le service est impeccable Review: Reemplazo correcto para GMC K15 1977 con Booster - La pieza llegó a tiempo y es el reemplazo correcto para camioneta GMC 1977 con Booster. El producto es AC Delco original pero fabricado en china. Lo devolví porque antes de que llegara encontré otro en una refaccionaría local a mejor precio y fabricado en México, así que devolví el de desertcart sin instarlo, usarlo o probarlo, así que no puedo opinar de su funcionamiento. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | ACDelco | | Brand | ACDelco | | Product Dimensions | 23.88 x 14.73 x 12.19 cm; 635.03 Grams | | Item model number | 18M1878 | | Manufacturer Part Number | 18M1878 | | OEM Part Number | 19176488 | | Volume | 262 Cubic Inches | | Manufacturer | ACDelco | | Country of Origin | USA | | Item Weight | 635 g | ## Images ![ACDelco 18M1878 Professional Brake Master Cylinder Assembly - Image 1](https://m.media-amazon.com/images/I/71pzyikuFlL.jpg) ![ACDelco 18M1878 Professional Brake Master Cylinder Assembly - Image 2](https://m.media-amazon.com/images/I/717KRIPB4YL.jpg) ![ACDelco 18M1878 Professional Brake Master Cylinder Assembly - Image 3](https://m.media-amazon.com/images/I/71h4Me2FoSL.jpg) ![ACDelco 18M1878 Professional Brake Master Cylinder Assembly - Image 4](https://m.media-amazon.com/images/I/71guyhCcGfL.jpg) ![ACDelco 18M1878 Professional Brake Master Cylinder Assembly - Image 5](https://m.media-amazon.com/images/I/711L2RgdJqL.jpg) ## Questions & Answers **Q: Why do brakes need to be replaced in the first place?** A: Friction material on the brake pad contacts the rotors to slow the vehicle. In time, that material wears away and the pads must be replaced. Sometimes the rotors and calipers must also be replaced. **Q: What’s the squealing sound I hear when braking?** A: Over time, wear indicators in brake pads may contact the rotors’ surface when braking, resulting in a metallic squealing sound. Vehicles equipped with wear sensors may also provide an alert that minimum brake pad thickness has been reached. **Q: What if it’s more of a grinding sound?** A: If all the friction material has been worn away, the metal backing plate of the brake pad will be the material in contact with the rotor during braking. It causes a grinding sound and braking performance is often diminished. **Q: Why do the brakes seem to pulsate when stopping?** A: It may be due to worn brake pads, unevenly worn rotors or unevenly worn tires. Have the pulsation diagnosed as soon as possible to avoid the possibility of greater brake system wear or damage. **Q: What about vibrations or shaking in the steering wheel?** A: This is more serious than pulsation. If the brakes are very worn or the rotors are unevenly worn, there can be a significant vibration or shaking in the steering wheel when braking. It may mean brake service is needed immediately. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Le service est excellent et rapide *by R***R on 29 March 2022* Cette pièce était nécessaire pour moi ,, car cette pièce sert a appliqué les freins d'un véhicule, les prix est excellent, la piece est complètement neuve et le service est impeccable ### ⭐⭐⭐ Reemplazo correcto para GMC K15 1977 con Booster *by F***Z on 10 December 2024* La pieza llegó a tiempo y es el reemplazo correcto para camioneta GMC 1977 con Booster. El producto es AC Delco original pero fabricado en china. Lo devolví porque antes de que llegara encontré otro en una refaccionaría local a mejor precio y fabricado en México, así que devolví el de Amazon sin instarlo, usarlo o probarlo, así que no puedo opinar de su funcionamiento. ### ⭐⭐⭐⭐⭐ Solid brakes *by J***N on 30 October 2025* Perfect fit. Works well. No issues at all. Installed on 77 K10 ## Frequently Bought Together - ACDelco Professional 18M1878 (19176488) Brake Master Cylinder Assembly - Dorman 13911 Master Cylinder Bleeder Kit - 22 In. Hose, Clip, And Sae And Metric Fittings Universal Fit - Dorman 14151 Master Cylinder Bleeder Kit --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/443668600-acdelco-18m1878-professional-brake-master-cylinder-assembly](https://www.desertcart.tn/products/443668600-acdelco-18m1878-professional-brake-master-cylinder-assembly) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-18*