URO 31121139991 Suspension Control Arm - Front Left Lower
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URO

URO 31121139991 Suspension Control Arm - Front Left Lower

Brand URO 31121139991
Position Front Left Lower
Pre-Greased Yes
Grease Fitting Included No
Bushings Included Yes
Ball Joint Mounting Type Bolt-in
Ball Joint Stud Type Threaded
Ball Joint Included Yes
Adjustable No
Adjustment Range (Deg) 45
Ball Joint Bearing Material Metal
Ball Joint Housing Material High strength steel
Ball Stub Thread Size M14x1.50
Ball Stud Nut Wrench Size 22mm
C Clip Included No
Castle Nut Included No
Cotter Pin Included No
Dust Boot Color Black
Dust Boot Included Yes
Dust Boot Material Neoprene
Greaseable No
Locking Nut Included Yes
Weight 3.7
Fits BMW · 53 vehicles

OE geometry. Manufactured for correct wheel alignment and directional control.

High-strength alloy metal. Built for durability and restored suspension handling.

Pre-greased. Includes bushings, ball joint, and a protective dust boot.

Cross-references Dorman - OE Solutions 520-733, URO 31121139991 and VAICO V20-7033-1 for the same application. See all 18.

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BMW Front Left Lower Control Arm

This URO suspension control arm, part number 31121139991, is a direct-fit front left lower arm for select BMW models. It restores proper suspension geometry, steering response, and braking stability for classic 5 Series, 6 Series, 7 Series, and M models.

  • Front left lower control arm for OE-style suspension repair
  • Pre-greased with ball joint included
  • Bushings included for a complete replacement assembly
  • High-strength steel and alloy construction for durability
  • Ball joint uses a bolt-in mounting type with threaded stud
  • Neoprene dust boot helps protect the joint from dirt and moisture
  • Manufactured to OE control arm geometry for alignment and directional control
  • 24-month unlimited mileage warranty

Fitment Details

Compatible with BMW 525i, 750iL, 535i, 735i, 735iL, 635CSi, 528e, 535is, M5, M6, 524td, and 533i applications in the front left lower position. BMW refers to this component as a wishbone on these vehicles. This part number 31121139991 is also cross-referenced to Dorman OE Solutions 520-733 for the same application.

  • Fits 1989-1995 BMW 525i, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1988-1994 BMW 750iL, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1985-1993 BMW 535i, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1988-1992 BMW 735i, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1988-1992 BMW 735iL, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1985-1989 BMW 635CSi, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1982-1988 BMW 528e, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1988 BMW 535is, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1988 BMW M5, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1987-1988 BMW M6, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1985-1986 BMW 524td, front left lower, steel; referred to as a wishbone by BMW
  • Fits 1983-1984 BMW 533i, front left lower, steel; referred to as a wishbone by BMW

What It Helps Correct

  • Loose or imprecise front-end steering feel
  • Uneven tire wear caused by worn suspension geometry
  • Clunking or play from a worn lower control arm or ball joint
  • Reduced braking stability under load
  • Alignment issues after suspension wear

Installation Notes

Install on the front left lower position only. Verify the threaded ball stud size, mounting style, and vehicle application before installation. Because this arm is pre-greased and includes bushings and a ball joint, it is suited for replacing a worn original assembly on BMW 525i, 535i, 528e, and related chassis applications. After installation, perform a professional wheel alignment to confirm correct suspension geometry.

Quality Assurance

URO manufactures this control arm to OE control arm geometry for correct wheel alignment and directional control. The steel construction, protected ball joint boot, and 24-month unlimited mileage warranty provide added confidence for long-term service on compatible BMW front suspension repairs. Part number 31121139991 is built for direct replacement use in the specified applications.

Related reading

This part fits 53 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypePositionNotes
1995BMW525iSedanFront Left LowerSteel; Referred to as a Wishbone by BMW
1994BMW525iSedanFront Left LowerSteel; Referred to as a Wishbone by BMW
1994BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1993BMW525iSedanFront Left LowerSteel; Referred to as a Wishbone by BMW
1993BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1993BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1992BMW525iSedanFront Left LowerSteel; Referred to as a Wishbone by BMW
1992BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1992BMW735i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1992BMW735iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1992BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1991BMW525i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1991BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1991BMW735i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1991BMW735iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1991BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1990BMW525i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1990BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1990BMW735i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1990BMW735iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1990BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW525i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW635CSi—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW735i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW735iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1989BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW535is—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW635CSi—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW735i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW735iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMW750iL—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMWM5—Front Left LowerSteel; Referred to as a Wishbone by BMW
1988BMWM6—Front Left LowerSteel; Referred to as a Wishbone by BMW
1987BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1987BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1987BMW635CSi—Front Left LowerSteel; Referred to as a Wishbone by BMW
1987BMWM6—Front Left LowerSteel; Referred to as a Wishbone by BMW
1986BMW524td—Front Left LowerSteel; Referred to as a Wishbone by BMW
1986BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1986BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1986BMW635CSi—Front Left LowerSteel; Referred to as a Wishbone by BMW
1985BMW524td—Front Left LowerSteel; Referred to as a Wishbone by BMW
1985BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1985BMW535i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1985BMW635CSi—Front Left LowerSteel; Referred to as a Wishbone by BMW
1984BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1984BMW533i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1983BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
1983BMW533i—Front Left LowerSteel; Referred to as a Wishbone by BMW
1982BMW528e—Front Left LowerSteel; Referred to as a Wishbone by BMW
Directly replaces or cross-references 18 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - OE Solutions — 520-733URO — 31121139991VAICO — V20-7033-112-99131 12 1 124 40131 12 1 131 58731 12 1 139 99131 12 1 139 991MY371 06028 381371 06028 500371 06028 681507-103131121131587ACK9127K9127RK9127SCA0039PURO-002272