Mercedes M-Class W166 front control arm kit 1663301807

Description

This TSBJ front control arm kit is a complete front suspension repair set for the Mercedes-Benz M-Class W166, covering OE references 1663301807, 1663300243, 1663300207, 1663200889 and 1663300235. Instead of ordering upper arms, lower arms, bushings and stabilizer links from four different suppliers, a workshop or distributor receives one matched set that was produced on the same line, to the same tolerances, and packed together.

On a W166 that has covered high mileage, the front suspension rarely fails one part at a time. The upper and lower control arm bushings soften together, the ball joints develop play, and the stabilizer links start knocking. Replacing only the noisiest component leaves the others to fail within a few thousand kilometres, which is why the comeback rate on partial repairs is high. Supplying the front control arm kit for Mercedes M-Class W166 as a set removes that problem: every joint and bushing in the front axle is renewed at once, and the alignment is set once.

We manufacture the kit as an OEM supplier. The arms are formed to the original geometry on our cold-heading and hot-forging lines, the bushings and ball joints are pressed and staked in house, and the kit is assembled and inspected before packing. Nothing needs to be pressed at the repair bay, which shortens labour time and removes the risk of damaging a new bushing during installation.

Zhejiang Tongshi Industrial Technology Co., Ltd. has built chassis and steering parts since 1985 under an IATF 16949:2016 quality system at its 12,000 square metre plant in Yuhuan, Zhejiang. The W166 kit carries a 12-month warranty and is available in neutral packaging or under your own brand for OEM and ODM programmes.

Key Features

1. Complete front axle set: upper and lower control arms, bushings and stabilizer links matched to one production batch, so wear rates stay consistent.
2. OE references 1663301807, 1663300243, 1663300207, 1663200889 and 1663300235 covered in one kit.
3. Pre-assembled: bushings and ball joints pressed and staked in house, so the repair bay needs no press and labour time drops.
4. One supplier, one tolerance: eliminates the mismatched-quality problem that causes repeat knocking after a mixed-brand repair.
5. Fewer comebacks: renewing the whole front axle at once removes the second failure that partial repairs leave behind.
6. IATF 16949:2016 production with in-house inspection and batch traceability.
7. 12-month warranty: standard cover for aftermarket distribution.
8. Factory-direct wholesale pricing with OEM / ODM and private label support.

Specifications

Materials & Finish

Arm bodies: formed on our in-house cold-heading and hot-forging lines to OE geometry.
Bushings: OE-matched rubber bushings bonded into the arms, so ride isolation is retained without adding steering slop.
Ball joints: machined stud and socket, pressed and staked during assembly.
Stabilizer links: steel body with a greased and sealed ball socket.
Finish: corrosion-resistant coating on all steel components for humid and winter-road-salt conditions.
Assembly: the kit is supplied fully assembled and inspected, so no press work is required at the repair bay.

Applications

Mercedes M-Class W166 front axle overhaul: renews every control arm, bushing and stabilizer link in one operation.
High-mileage suspension refresh: the cost-effective option when several front-end joints are already at the end of their life.
Knocking and vague steering complaints: removes the multiple wear sources that make diagnosis by part-by-part replacement slow.
Accident repair: replacement set after front impact where more than one arm has been bent.
Four-wheel alignment preparation: fitting the complete kit means the alignment is set once, not after each individual part.
Wholesale and distribution: one part number simplifies stocking and reduces the number of suppliers a workshop deals with.

FAQ

Q: What is included in the kit?
A: The front control arm kit for the Mercedes M-Class W166 contains front control arms with bushings and ball joints already installed, plus stabilizer links, covering OE references 1663301807, 1663300243, 1663300207, 1663200889 and 1663300235. Confirm the exact contents against your order before shipping.

Q: Does it fit the GL-Class X166 as well?
A: The references are commonly cross-referenced for W166, X166 and C292. Because Mercedes changed part numbers across the model run, confirm by VIN before ordering.

Q: Do I have to press the bushings in?
A: No. All bushings and ball joints are pressed and staked in house, so the kit arrives ready to bolt on.

Q: Why buy the kit instead of individual arms?
A: On a high-mileage W166 the front-end components wear together. Replacing the complete set avoids the second failure that a partial repair leaves behind, and keeps the front axle on one tolerance.

Q: What is the MOQ and lead time?
A: MOQ from 1 set. Stock ships in 5-7 days; production orders take 25-40 days, FOB Ningbo or Shanghai.

Packing & Logistics

Neutral packaging as standard; kit components packed together as one set.
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 the complete kit.
Sample sets from 1 unit for fit and finish checks.
OEM / ODM and private label packaging supported.
Over 3,000 chassis references, so kits and individual wear parts can be consolidated in one shipment.