Smart Immobilizer relay
Compare OEM & aftermarket Smart immobilizer relay — check fitment by model and engine
Browse Immobilizer relay parts for Smart
Smart Immobilizer relay — buying guide
Finding the right immobilizer relay for your Smart is essential for safe and reliable driving. We offer a wide selection from leading manufacturers, all with TecDoc-verified fitment for your specific vehicle.
When choosing immobilizer relay for your Smart, consider factors like OEM vs aftermarket quality, material specifications, and your driving conditions. OEM parts match original specifications exactly, while premium aftermarket brands like Bosch, TRW, and Febi Bilstein often offer comparable quality at lower prices.
All immobilizer relay listed on this page are confirmed compatible with Smart. Our fitment data is sourced from TecDoc, the industry-standard European automotive parts database. If you are unsure about compatibility, check the OE part number on your existing component and use our cross-reference search.
Frequently Asked Questions
What immobilizer relay fits a Smart?
We stock immobilizer relay options compatible with Smart vehicles. Use the vehicle selector above to narrow by model and engine for confirmed TecDoc fitment. All parts are verified to match Smart specifications.
How do I choose the right immobilizer relay for my Smart?
Start by selecting your exact Smart model and engine above. This filters to parts with confirmed fitment. Compare options from leading brands. Check specifications like dimensions and material to match your driving needs.
Are aftermarket immobilizer relay parts as good as OEM for Smart?
Quality aftermarket immobilizer relay from brands like are manufactured to meet or exceed OEM specifications for Smart vehicles. Many use identical materials and production processes. All parts listed include TecDoc-verified fitment data.
How often should immobilizer relay be replaced on a Smart?
Replacement intervals for immobilizer relay vary by Smart model, engine, and driving conditions. Consult your Smart owner's manual for manufacturer-recommended service intervals. Common signs of wear include changes in performance, unusual noises, or dashboard warning lights.
