Add products by adding codes
Set of adjustable steel rear axle control arms BMW Z4 G29 G20 G21 G22 G23 G26 G28 G42 - Uniball
- A complete kit of 8 adjustable rear axle control arms (4 pairs) for BMW Z4 G29 and 2 Series Coupe G42, 3 Series G20 / G21 / G28, and 4 Series G22 / G23 / G26
PMC Motorsport Set of Adjustable Forged Steel Rear Control Arms BMW Z4 G29 and 2 / 3 / 4 Series (G42, G20, G21, G28, G22, G23, G26) with Uniball Rod Ends – Full Set of 8 pcs
A complete kit of 8 adjustable rear axle control arms (4 pairs) for BMW Z4 G29 and 2 Series Coupe G42, 3 Series G20 / G21 / G28, and 4 Series G22 / G23 / G26. Manufactured using PMC Technik technology: forged monoblock links with CFT cold-rolled threads and 40HM Uniball spherical rod ends with PTFE liners. The set replaces all adjustable rear suspension arms, enabling comprehensive suspension alignment – toe, camber, and wheel positioning – optimized for coilovers, circuit racing, drifting, or time attack.
Benefits for You
- Complete rear axle alignment control – one full set replaces all four pairs of control arms, allowing independent toe and camber adjustments without factory adjustment range constraints.
- Weldless forged monoblock links – forged from a single billet of steel with zero welds and no heat-affected zone (HAZ), delivering a 6:1 safety factor under dynamic loads.
- CFT cold-rolled threads – up to 30% higher tensile strength than cut threads, with surface roughness of Ra ≤ 0.8 µm ensuring smooth adjustments even after years of harsh use.
- 40HM Uniballs with PTFE liners – heat-treated 42CrMo4 / AISI 4140 chromoly steel housing, self-lubricating design operating reliably from −50°C to +150°C.
- Direct handling with zero play – Uniball spherical bearings eliminate factory rubber bushing deflection, maintaining fixed geometry under extreme acceleration, braking, and cornering loads.
- Durable powder coating – white powder-coated finish protects high-grade steel against corrosion, debris, and road salt.
- Plug & play installation – direct replacement bolting straight into factory mounting locations without chassis modifications.
- Manufactured in Poland with strict quality control – every component is CNC-machined and inspected prior to dispatch.
KIT CONTENTS
- Rear upper trailing arms – 2 pcs, replacement for BMW OE 33 32 6 878 631 (left) / 33 32 6 878 632 (right), OE length 238 mm / 9.37", adjustment range 224–250 mm / 8.82"–9.84" – rear axle geometry correction
- Rear toe control arms (toe links) – 2 pcs, replacement for BMW OE 31 10 6 879 659, OE length 440 mm / 17.32", adjustment range 434–460 mm / 17.09"–18.11" – rear toe alignment
- Rear trailing arms (traction links) – 2 pcs, replacement for BMW OE 33 30 6 878 639, OE length 330 mm / 12.99", adjustment range 315–341 mm / 12.4"–13.43" – geometry correction and rear stability under load
- Rear upper control arms (camber arms) – 2 pcs, replacement for BMW OE 33 32 6 881 199, OE length 288 mm / 11.34", adjustment range 270–296 mm / 10.63"–11.65" – rear camber adjustment
TECHNICAL INFORMATION
- type: complete adjustable rear control arm set, 4 pairs (8 pcs)
- links: forged monoblock, steel, Rm 470–630 MPa, Re ≥ 355 MPa
- thread: M18x1.5 cold-rolled (CFT)
- joints: Uniball M16x1.5, 40HM (42CrMo4 / AISI 4140), Rm 900–1100 MPa, PTFE liner, load rating 63 kN
- coating: powder coated, color: white
- OE replacements: BMW 33 32 6 878 631, 33 32 6 878 632, 31 10 6 879 659, 33 30 6 878 639, 33 32 6 881 199
- intended use: coilover suspension, motorsport
APPLICATION:
BMW Z4 Roadster (G29) from 2019
- sDrive20i – B46 / B48
- sDrive30i – B48
- M40i – B58
BMW 2 Series Coupe (G42) from 2022
- 230i / 230i xDrive – B48
- M240i / M240i xDrive – B58
BMW 3 Series Sedan (G20, also LCI) from 2019
- 318d / 320d / 320d xDrive / 330d xDrive – B47 / B57
- 318i / 320i / 320i xDrive / 330i / 330i xDrive – B46 / B48
- 320e / 330e (plug-in hybrid) – B46 / B48
- M340i / M340i xDrive – B58
- ALPINA D3 S – B57
BMW 3 Series Touring (G21, also LCI) from 2019
- 318d / 320d / 320d xDrive / 330d / 330d xDrive – B47 / B57
- 318i / 320i / 330i / 330i xDrive – B46 / B48
- 330e (plug-in hybrid) – B48
- M340i xDrive – B58
- ALPINA B3 Touring – S58
BMW 3 Series Long Sedan (G28, also LCI) from 2019
- 320Li / 330Li – B48
BMW 4 Series Coupe (G22) / Convertible (G23) from 2020
- 430i / 430i xDrive – B46 / B48
- M440i / M440i xDrive – B58
BMW 4 Series Gran Coupe (G26, also LCI) from 2021
- 420d xDrive – B47
- 430i / 430i xDrive – B46 / B48
- M440i / M440i xDrive – B58
- ALPINA B4 Gran Coupé – S58
Frequently Asked Questions
Which cars does this kit fit?
BMW Z4 G29, 2 Series Coupe G42, 3 Series G20 / G21 / G28, and 4 Series G22 / G23 / G26, with petrol, diesel, and hybrid engines, RWD and xDrive, as well as ALPINA B3, B4, and D3 S versions. All control arms in this set have verified fitment matching the BMW parts catalog.
Does the kit fit BMW M2 G87, M3 G80 / G81, or M4 G82 / G83?
No. M models feature a different rear suspension geometry and different factory control arms. For those vehicles, we offer dedicated PMC adjustable control arms.
What is included in the kit?
4 pairs (8 pcs) of adjustable control arms comprising a complete rear axle set: rear upper trailing arms, rear toe arms (toe links), rear trailing arms (traction links), and rear upper control arms (camber arms).
Can I purchase these control arms individually?
Yes. Each pair of control arms in this kit is available separately. However, this full kit is the best choice if you need full alignment control over the entire rear axle.
Does installation require any modifications?
No. The arms bolt directly into factory mounting points. A full wheel alignment on a professional alignment rack is required after installation.
Is Uniball suitable for a daily driver?
Yes, although Uniball spherical bearings transfer more NVH to the chassis than soft factory rubber bushings. In return, they offer precise and consistent handling, making them ideal for sports, track, and drift setups.
Does the price include customs duty for shipments outside the European Union?
No. Product prices and shipping quotes do not include customs duties or import taxes that may apply in the destination country.
Can I buy with 0% VAT?
Yes, if you are a B2B customer outside Poland with a valid EU VAT number (verified via VIES) or if your order is shipped outside the EU.
PMC Motorsport parts are intended for motorsport use. Installation should be performed by a professional workshop, and wheel alignment must be adjusted after fitting.