HomeBrake > Hardware, Fasteners and FittingsMPA Electrical B1090 Power Brake Booster
Part #: B1090

MPA Electrical B1090 Power Brake Booster

Reman Vac Pwr Brake Booster w/o Master Cyl
⚙️ 6 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$235.22Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Reman Vac Pwr Brake Booster w/o Master Cyl
🚗Fitment: Jeep, Cherokee and Comanche
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of MPA Electrical Reman Vacuum Power Brake Booster

The MPA Electrical Reman Vac Pwr Brake Booster w/o Master Cyl (Part Number B1090) is designed as a standard replacement power brake booster for select Jeep models. This remanufactured vacuum booster provides reliable braking assistance without the master cylinder, making it suitable for specific brake system repairs.

  • Standard replacement grade for dependable brake performance
  • Vacuum booster type with a single diaphragm design
  • Metal housing for durability and long service life
  • Compatible with Jeep Cherokee and Jeep Comanche models
  • Includes two mounting studs with 3/8-16 thread size

Product Line Details: Reman Vac Pwr Brake Booster w/o Master Cyl

The Reman Vac Pwr Brake Booster w/o Master Cyl product line from MPA Electrical focuses on remanufactured vacuum power brake boosters that do not include the master cylinder. This line is intended for customers who require a replacement booster unit compatible with their existing master cylinder setup. The remanufactured condition ensures that the booster meets standard brake service grade requirements while providing a cost-effective alternative to new parts.

Detailed Product Description

This power brake booster features a single diaphragm with a diameter of approximately 221.49 mm (8.72 inches), housed in a durable metal casing. It operates using vacuum assistance to reduce pedal effort and improve braking response. The unit does not include a master cylinder, gasket, seal, front seal, brake pedal rod extension, or mounting bracket, so it is intended for use with existing compatible components. The booster mounts using two studs with a 3/8-16 thread size, ensuring secure installation in the brake system.

Applications and Common Issues Addressed

  • Replacement for failing or weak vacuum power brake boosters on Jeep Cherokee and Comanche
  • Restores proper brake pedal feel and reduces pedal effort
  • Addresses issues with inconsistent or hard brake pedal operation
  • Suitable for brake systems where the master cylinder remains functional
  • Helps resolve vacuum leaks or diaphragm failure within the booster

Installation Notes and Tips

When installing the MPA Electrical B1090 power brake booster, ensure the existing master cylinder is compatible and in good condition, as it is not included with this part. Verify that the mounting studs align correctly with the vehicle’s firewall and brake pedal assembly. It is recommended to inspect all related seals and gaskets during installation and replace them as necessary to prevent vacuum leaks. Proper bleeding of the brake system after installation is essential for optimal brake performance.

Quality Assurance and Warranty

This remanufactured power brake booster undergoes thorough inspection and testing to meet standard brake service grade requirements. The metal housing and diaphragm are rebuilt to ensure reliable operation. While specific warranty details are not provided, remanufactured parts from MPA Electrical typically come with a limited warranty covering defects in materials and workmanship.

BrandMPA Electrical
Part NumberB1090
PositionReman Vac Pwr Brake Booster w/o Master Cyl
Brake Service GradeStandard replacement
Booster TypeVacuum
Brake Pedal Rod Extension IncludedNo
Diaphragm TypeSingle
Master Cylinder IncludedNo
Gasket Or Seal IncludedNo
Housing MaterialMetal
Diaphragm Diameter221.49
Diaphragm Diameter8.72
Mounting Bracket IncludedNo
Front Seal IncludedNo
Master Cylinder Stud Thread Size (mm)3/8-16
Mounting Stud Quantity2
Product ConditionRemanufactured

This part fits 6 vehicles. Search below:

YearMakeModelPositionNotes
1994JeepCherokeeN/AReman Vac Pwr Brake Booster w/o Master Cyl
1993JeepCherokeeN/AReman Vac Pwr Brake Booster w/o Master Cyl
1992JeepCherokeeN/AReman Vac Pwr Brake Booster w/o Master Cyl
1992JeepComancheN/AReman Vac Pwr Brake Booster w/o Master Cyl
1991JeepCherokeeN/AReman Vac Pwr Brake Booster w/o Master Cyl
1991JeepComancheN/AReman Vac Pwr Brake Booster w/o Master Cyl

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

4637769

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.