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Details
| Specification | Value |
|---|---|
| Brand | HART |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- HYUNDAI—54520 31600
- KIA—54530 31600
Where this part fits
Original-fit position for OE 5453031600. The red ring marks where this part installs on the vehicle.
About this product
Sourced from HART, this ball joint (421 784) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. This part supersedes original equipment references: 54520 31600, 54530 31600. 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
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.No equivalent parts found.
Ball Joint HART 421 784 — compatible car models
| Manufacturer article number (MPN) | 421 784 |
|---|---|
| OE part numbers | 54520 31600, 54530 31600 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
HART 421784 . 421 784
- 1x Ball Joint
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 Ball Joint compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Ball Joint fits. All fitment data is verified through TecDoc.
What specifications does this HART Ball Joint have?
The package includes the Ball Joint as described in the specifications above. Check the "What's included" section for a full list of components. If mounting hardware or accessories are required, they will be listed separately.
What OE part numbers does this Ball Joint replace?
This Ball Joint replaces OE part numbers: 54520 31600, 54530 31600. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Ball Joint cost?
This HART Ball Joint is available for £7.99. Ball Joint 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 Ball Joint?
Signs include clunking or knocking noises from the front suspension, wandering steering, uneven tyre wear, or vibration in the steering wheel.
What tools do I need to replace a Ball Joint?
Tools needed: ball joint separator (fork or press type), 18-21mm socket, hub nut socket (32-36mm on driven axles), torque wrench, new cotter pin. Difficulty: Moderate DIY. Safety warning: Never reuse an old split pin (cotter pin) after disturbing a ball joint nut. A loose ball joint can allow the wheel to detach from the vehicle at speed -- this is a critical safety component.
Can I use this part as a replacement for OE 54520 31600?
Yes, this HART Ball Joint is a direct replacement for OE part number 54520 31600. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
