HomeBrake > Hoses and PipesDorman H621931 Brake Hydraulic Hose - Rear Left or Rear Right
Part #: H621931

Dorman H621931 Brake Hydraulic Hose - Rear Left or Rear Right

Rear Left
⚙️ 48 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$30.83Free 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
🚗Fitment: Cadillac, ATS and CTS
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Brake Hydraulic Hose for Cadillac ATS and CTS

The Dorman H621931 brake hydraulic hose is designed to provide dependable brake fluid transfer for Cadillac ATS and CTS models. Engineered with durable materials, this flexible brake hose ensures consistent performance and safety under various driving conditions.

  • Compatible with Cadillac ATS and CTS vehicles
  • Constructed with EPDM rubber hose material for flexibility and durability
  • Black outer sleeve made of rubber with protective jacket included
  • Ends feature treated steel fittings: banjo fitting on one end and female fitting on the other
  • Includes gaskets for secure sealing during installation
  • Overall length of 13 inches with 11.75 inches axis length
  • Bracket material is stamped steel (bracket not included)

Durable Construction and Precise Fitment

The Dorman H621931 brake hydraulic hose features a flexible EPDM rubber hose core with a black rubber outer sleeve and protective jacket to resist wear and environmental damage. The treated steel fittings include a banjo fitting with a 10 mm thread diameter on one end and a female fitting with an M10 x 1.0 inside diameter on the other, ensuring a secure connection to the brake system. This hose is designed specifically for Cadillac ATS and CTS models, providing an exact fit and reliable brake fluid transfer. The package includes necessary gaskets to maintain a leak-free seal during installation.

Common Applications and Problem Resolution

  • Replaces worn or cracked brake hydraulic hoses causing fluid leaks
  • Addresses brake pedal softness due to hose expansion or damage
  • Restores proper brake fluid pressure for consistent braking performance
  • Prevents contamination and moisture ingress with durable EPDM rubber material
  • Eliminates brake system warning lights related to hose failure

Installation Notes and Tips

When installing the Dorman H621931 brake hydraulic hose, ensure all old gaskets are removed and replaced with the included new gaskets to prevent leaks. Verify the hose routing matches the original to avoid kinks or interference with suspension components. Tighten fittings to manufacturer torque specifications to maintain a secure connection. Bleed the brake system thoroughly after installation to remove air and restore proper brake function.

Quality Assurance and Warranty

Dorman manufactures the H621931 brake hydraulic hose to meet or exceed OEM standards for fit, form, and function. The use of treated steel fittings and EPDM rubber materials ensures durability and resistance to corrosion and wear. This part comes with a limited warranty covering defects in materials and workmanship, providing confidence in its long-term reliability for Cadillac ATS and CTS brake systems.

BrandDorman
Part NumberH621931
Axis 1 Length11.75
Bracket IncludedNo
Bracket MaterialStamped Steel
ColorBlack
Describe TypeFlexible Hose
End 1 Fitting MaterialTreated Steel
End 1 Fitting TypeBanjo
End 1 Thread Diameter10 mm
End 2 Fitting Inside DiameterM10 X 1.0
End 2 Fitting MaterialTreated Steel
End 2 Fitting TypeFemale
Gasket Or Seal IncludedYes
Hose MaterialEPDM Rubber
Jacket IncludedYes
Mounting Hardware IncludedNo
Outer Sleeve MaterialRubber
Overall Length13
Package Contents1 Brake Hose; Gaskets

This part fits 48 vehicles. Search below:

YearMakeModelSubmodelBody TypeDrive TypePositionNotes
2017CadillacATSBaseRear Left
2017CadillacATSLuxuryRear Left
2017CadillacATSPremium PerformanceRear Left
2017CadillacATSPerformanceRear Left
2017CadillacATSBaseRear Right
2017CadillacATSLuxuryRear Right
2017CadillacATSPremium PerformanceRear Right
2017CadillacATSPerformanceRear Right
2017CadillacCTSBaseRear Left
2017CadillacCTSPremiumRear Left
2017CadillacCTSLuxuryRear Left
2017CadillacCTSBaseRear Right
2017CadillacCTSPremiumRear Right
2017CadillacCTSLuxuryRear Right
2016CadillacATSBaseRear Left
2016CadillacATSPremiumRear Left
2016CadillacATSLuxuryRear Left
2016CadillacATSPerformanceRear Left
2016CadillacATSBaseRear Right
2016CadillacATSPremiumRear Right
2016CadillacATSLuxuryRear Right
2016CadillacATSPerformanceRear Right
2016CadillacCTSBaseRear Left
2016CadillacCTSPremiumRear Left
2016CadillacCTSLuxuryRear Left
2016CadillacCTSPerformanceRear Left
2016CadillacCTSBaseRear Right
2016CadillacCTSPremiumRear Right
2016CadillacCTSLuxuryRear Right
2016CadillacCTSPerformanceRear Right
2015CadillacATSSedanRear Left
2015CadillacATSCoupeRear Left
2015CadillacATSSedanRear Right
2015CadillacATSCoupeRear Right
2015CadillacCTSSedanRear Left
2015CadillacCTSSedanRear Right
2014CadillacATSRear Left
2014CadillacATSRear Right
2014CadillacCTSBaseSedanRWDRear Left
2014CadillacCTSPremiumSedanRWDRear Left
2014CadillacCTSLuxurySedanRWDRear Left
2014CadillacCTSPerformanceSedanRWDRear Left
2014CadillacCTSBaseSedanRWDRear Right
2014CadillacCTSPremiumSedanRWDRear Right
2014CadillacCTSLuxurySedanRWDRear Right
2014CadillacCTSPerformanceSedanRWDRear Right
2013CadillacATSRear Left
2013CadillacATSRear Right

* 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:

150.62468208827242205987BH144922BH383802

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