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OE Quality
60-Day Returns
MPA ElectricalPart #: B4243
MPA Electrical B4243 Power Brake Booster
3 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$291.19Free 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: Lexus, GS350
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Power Brake Booster options
MPA Electrical B4243 Power Brake Booster
| Brand | MPA Electrical |
|---|---|
| Part Number | B4243 |
| Position | Reman Vac Pwr Brake Booster w/o Master Cyl |
| Brake Service Grade | Standard replacement |
| Brake Pedal Rod Extension Included | No |
| Master Cylinder Included | No |
| Gasket Or Seal Included | No |
| Housing Material | Metal |
| Diaphragm Diameter | 10.75 |
| Diaphragm Diameter | 273.05 |
| Mounting Bracket Included | No |
| Front Seal Included | No |
| Master Cylinder Stud Thread Size (mm) | 8 x 1.25 |
| Mounting Stud Quantity | 4 |
| Product Condition | Remanufactured |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Submodel | Drive Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2015 | Lexus | GS350 | Base | RWD | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl |
| 2014 | Lexus | GS350 | Base | RWD | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl |
| 2013 | Lexus | GS350 | N/A | Reman 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:
44610-30B50
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.