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Details
| Specification | Value |
|---|---|
| Brand | HART |
| Length [mm] | 125 mm |
OE/OEM numbers (7)
Search by this OE number to find compatible parts
- BMW—32 21 1 123 881
- BMW—32 21 1 129 051
- BMW—32 21 1 129 978
- BMW—32 21 1 131 067
- BMW—32 21 1 133 699
- BMW—32 21 1 136 450
- BMW—32 21 2 908 243
Where this part fits
Original-fit position for OE 32211136450. The red ring marks where this part installs on the vehicle.
About this product
The HART Steering Arm (421 789) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Length [mm]: 125 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 32 21 1 123 881, 32 21 1 129 051, 32 21 1 129 978, 32 21 1 131 067 and 3 more. Matching these numbers confirms a like-for-like replacement with no loss of function. HART is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
No equivalent parts found.
Steering Arm HART 421 789 — compatible car models
| Car models | BMW: 5 (E28), 5 (E34), 5 Touring (E34), 6 (E24), 7 (E32), 8 (E31) |
|---|---|
| Engines | 518 i; 628 CSi; 730 i, iL; 840 Ci |
| Year of manufacture | 1975-1999 |
| Manufacturer article number (MPN) | 421 789 |
| OE part numbers | 32 21 1 123 881, 32 21 1 129 051, 32 21 1 129 978, 32 21 1 131 067, 32 21 1 133 699, 32 21 1 136 450, 32 21 2 908 243 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
HART 421789 . Length [mm]: 125 mm
- 1x Steering Arm
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Steering Arm compatible with my car?
This Steering Arm fits BMW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this HART Steering Arm have?
This HART Steering Arm has the following specifications: Length [mm]: 125 mm. Check the full specifications table above for complete details.
What OE part numbers does this Steering Arm replace?
This Steering Arm replaces OE part numbers: 32 21 1 123 881, 32 21 1 129 051, 32 21 1 129 978, 32 21 1 131 067, 32 21 1 133 699, 32 21 1 136 450, 32 21 2 908 243. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Steering Arm cost?
This HART Steering Arm is available for £9.99. Steering Arm prices vary depending on brand, specifications, and vehicle compatibility. HART parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Steering Arm?
Regular inspection of your Steering Arm is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Steering Arm?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Steering Arm fitted by a professional mechanic.
Can I use this part as a replacement for OE 32 21 1 123 881?
Yes, this HART Steering Arm is a direct replacement for OE part number 32 21 1 123 881. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
