BMW 5 Series G38 front upper control arm 31106861185

Description

This TSBJ front upper control arm is a direct replacement for the BMW 5 Series G38 front suspension, built to OE number 31106861185. The upper wishbone locates the top of the front knuckle and holds camber and caster geometry as the suspension travels. Once its bushing softens or the ball joint develops play, the arm can no longer hold those angles, and the driver feels it as vague steering, a shimmy at speed and uneven front tyre wear.

We produce the front upper control arm for BMW 5 Series G38 as an OEM manufacturer, not a trading company. The arm is formed to the original geometry, the bushing and ball joint are pressed and staked in house, and each batch is checked against the OE sample before packing. The part therefore bolts to the factory subframe and knuckle mounting points without slotting, spacers or modification.

One reference covers a wide service range: OE 31106861185 is used across the G30 and G31 5 Series, the G38 long-wheelbase 5 Series and the related F90 and G32 front ends, which lets a distributor stock one SKU instead of four. The arm is supplied as a complete assembly with the bushing and ball joint already installed, so the repair bay does not need a press.

Zhejiang Tongshi Industrial Technology Co., Ltd. has manufactured chassis and steering parts since 1985 under an IATF 16949:2016 quality system. This BMW 5 Series upper control arm ships from our own plant at factory-direct wholesale pricing with a 12-month warranty, and can be packed under your own brand for OEM and ODM programmes.

Key Features

1. OE 31106861185 direct fit: formed to the original wishbone geometry, mounts on the factory subframe and knuckle points without modification.
2. Geometry restored: brings camber and caster back into range, correcting the pull and inner-edge tyre wear caused by a worn bushing.
3. Ball joint assembled in house: pressed and staked before packing, so the arm arrives ready to bolt on with no press work at the repair bay.
4. OE-matched bushing: rubber compound and dimensions matched to the original to keep ride isolation without adding steering slop.
5. One SKU, several platforms: covers G30, G31, G38 and related F90 / G32 front ends.
6. IATF 16949:2016 production: automotive quality system with in-house inspection equipment and batch traceability.
7. 12-month warranty: standard cover for aftermarket distribution.
8. Factory-direct wholesale: produced in our own plant, so cost, lead time and engineering changes stay under our control.

Specifications

Materials & Finish

Arm body: formed on our in-house cold-heading and hot-forging lines to OE geometry.
Ball joint: machined stud and socket, assembled and staked during production.
Bushing: OE-matched rubber bushing bonded into the arm.
Finish: corrosion-resistant coating on the arm and stud for humid and winter-road-salt conditions.
Assembly: supplied as a complete unit (arm, bushing, ball joint), so nothing has to be pressed at the counter.

Applications

BMW 5 Series G30 / G31 front suspension repair: replaces an upper arm with bushing play or ball joint knock.
G38 long-wheelbase 5 Series: same reference, direct fit for China and export markets.
Front-end knock and vague steering diagnosis: the first part to check when a customer reports a clunk over joints and a wandering front end.
Tyre wear correction: restores camber and caster so inner-edge wear stops progressing.
Accident repair: replacement after front impact where the upper arm has been bent.
Wholesale stock: one reference covers several 5 Series variants, reducing SKU count for distributors.

FAQ

Q: Will 31106861185 fit my BMW 5 Series?
A: It is built to OE 31106861185 for the front upper position on the G30 and G31 5 Series, the G38 long-wheelbase car and related F90 / G32 front ends. Confirm your VIN or the number on the existing arm before ordering.

Q: Do I need to replace both sides?
A: Recommended. Upper arms wear at a similar rate; fitting one side only leaves the opposite arm with different bushing stiffness, which can pull the alignment off.

Q: Is the ball joint already installed?
A: Yes. The arm ships as a complete assembly with the bushing and ball joint pressed and staked, so the repair bay does not need a press.

Q: Do I need a wheel alignment after fitting?
A: Yes. Any upper control arm change affects camber and caster, so a four-wheel alignment should follow the repair.

Q: What is the MOQ and lead time?
A: MOQ from 1 pcs. Stock items ship in 5-7 days; production orders take 25-40 days.

Packing & Logistics

Neutral packaging as standard, suitable for wholesale resale.
Stock items dispatched in 5-7 days; production orders 25-40 days.
Loading from Ningbo / Shanghai.
Payment by T/T or L/C.

Service

12-month warranty on every unit.
Sample orders from 1 pcs so you can inspect fit and finish before bulk.
OEM / ODM and private label packaging supported.
Over 3,000 chassis and steering part models, so control arms, ball joints, stabilizer links and tie rod ends can ship together.