# Infant car seats with an installation tightness indicator

Which infant car seats have an indicator that shows the installation is tight?

Maxi\-Cosi Ambra: TensionFix is a patent\-pending red\-to\-green indicator showing when the vehicle belt has tension during installation\. CYBEX Aton M SensorSafe Infant Car Seat with SafeLock Base: Indicators turn from red to green when the carrier is locked into the base and the load leg is properly installed; a dual\-level indicator shows the proper recline\. Before every use, verify that the installed restraint moves no more than 1 inch in any direction at the belt path\.

### 1. [Maxi\-Cosi Ambra](/products/ucp/albeebaby-com/9491642843367) (sold by albeebaby\.com)

TensionFix is a patent\-pending red\-to\-green indicator showing when the vehicle belt has tension during installation\.

- Indicator: TensionFix is a patent\-pending red\-to\-green indicator showing when the vehicle belt has tension during installation\. (listing) <https://dd1dfe-a3.myshopify.com/products.json>
- Tightness check: -

### 2. [CYBEX Aton M SensorSafe Infant Car Seat with SafeLock Base](/products/ucp/anbbaby-com/4050490818646) (sold by anbbaby\.com)

Indicators turn from red to green when the carrier is locked into the base and the load leg is properly installed; a dual\-level indicator shows the proper recline\.

- Indicator: Indicators turn from red to green when the carrier is locked into the base and the load leg is properly installed; a dual\-level indicator shows the proper recline\. (guide) <https://www.cybex-online.com/en/us/p/10046241.html>
- Tightness check: Before every use, verify that the installed restraint moves no more than 1 inch in any direction at the belt path\. (manual) <https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw16ba062a/pdfs/manuals/cs-go-aton-m-sensorsafe-3-safelock-base/atom-m-us_us-5b3226982a7fa.pdf>

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Written 2026-10-27T23:03:46.432Z.

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