Smart #3 HX21 Door Lock
New, used, or aftermarket – from sellers across Europe.
Parts availability
Limited availability – hank searches the web for you.
Estimated price range
Widely available Limited Hard to find
Last updated: 02.10.2026, 18:36
Door Lock for your Smart #3?
Create a parts request and we will automatically search the web for suitable offers. You'll receive the results by e-mail - free of charge.
In addition, sellers on hank can send you offers directly.
Prices from recent listings
| Source | Condition | Price (approx.) | Last seen |
|---|---|---|---|
| Autodoc | New | 26.49 € | 2026-10-02 |
| Autodoc | New | 53.99 € | 2026-10-02 |
| Kleinanzeigen | Unknown | 20.00 € | 2026-08-31 |
| Kleinanzeigen | New | 180.00 € | 2026-08-31 |
Indicative values only – current prices may vary.
Price comparison: Door Lock
Current median for the Smart #3 HX21: 40.24 €.
Median across all car models: around 59 €. This model is 30% below that and cheaper than 75% of the models compared.
Median across Smart car models: around 63 €. This model is 35% below that and cheaper than 100% of the models compared.
Compares the medians of the most recent offers found for each model.
Find Smart #3 HX21 parts online
hank's free AI report searches specialized shops for Smart #3 HX21 parts, including partsformercedes-benz.com, GSF Car Parts & Mecatechnic.
About this part
Door locks on your #3 HX21 secure your vehicle via the central locking system, key fob and immobiliser. A faulty lock that won't engage or release properly compromises your vehicle's security.
Frequently asked questions
What should I check when ordering a replacement door lock for the Smart #3?
Confirm the door position (front/rear, left/right) on your #3 HX21 and whether you need just the lock actuator or the complete lock assembly including the cylinder.
Can I replace just the lock actuator?
On most vehicles yes – the actuator motor can be replaced without changing the entire lock. This is often the more affordable fix when the mechanical lock still works.
Why hank?
- Free to use - no hidden fees
- European reach - sellers across EU/EEA & UK
- Direct contact - no middlemen
- Auto-translate - no language barriers
- Specializing in rare and hard-to-find parts
- AI-supported parts search - we find offers for you
