How to Install a Cybex 360 Rotating Car Seat

What "Cybex 360" Refers To

"360" is how Cybex and shoppers describe the brand's rotating convertible and all-in-one seats. On these seats the child's shell swivels on an installed base, so it can turn toward the open door for loading and then lock facing rearward or forward for travel. Several models and generations have been sold in the US under different names, and they differ in features such as load legs, belt lock-offs, sensor systems and weight or height limits. Before you begin, find the model name and manufacture date on the seat's label and use the manual written for that exact version.

Before You Start

Read the car seat manual and the child restraint section of your vehicle owner's manual. Together they tell you which seating positions are approved and where the anchors are. Park on level ground so the seat's recline or level indicator reads accurately. Decide on orientation. Rear-facing is generally recommended for as long as the child fits within the seat's rear-facing limits. Choose an installation method: lower anchors or vehicle seat belt. Both are equally safe when done correctly. Pick the one that gives a tight, correct fit in your vehicle. Check whether your version has a load leg, an anti-rebound feature or a belt lock-off, and note how each one should be used.

Rear-Facing Installation With Lower Anchors

Lower anchors are the metal bars in the seat bight, the crease between the vehicle's seat back and cushion. They are part of the system often called LATCH in the US. Rotating Cybex seats typically use rigid connectors or flexible straps that attach to these bars from the base.

Set the base to the recline position the manual specifies for rear-facing use. Extend the lower anchor connectors and push or clip them onto the vehicle's anchor bars until they click or show a locked indicator. Press the base firmly into the vehicle seat while tightening or retracting the connectors. If your model has a load leg, extend it until it rests firmly on the vehicle floor. Do not place it on an under-floor storage lid unless your vehicle manual allows it. Rotate the shell to the rear-facing travel position and confirm it is locked. Check the recline or level indicator, then do the tightness test described below.

Lower anchors have a weight limit that covers the child and the seat combined. The seat's label or manual states when you must switch from lower anchors to a seat belt installation. Follow that limit rather than a general rule of thumb.

Rear-Facing Installation With the Vehicle Seat Belt

Seat belt routing is the alternative when lower anchors are unavailable, poorly placed or past their weight limit. The base will have a marked belt path for each orientation. Using the wrong path is one of the most common installation errors.

Route the lap and shoulder belt through the rear-facing belt path shown on the base labels, keeping the webbing flat and untwisted. Buckle the belt and remove slack while pressing down on the base. Lock the belt, either with the seat's built-in lock-off if equipped or by using the vehicle's locking retractor. In many vehicles you engage it by pulling the shoulder belt all the way out and letting it retract. Deploy the load leg if your model has one, then rotate the shell into rear-facing travel position and confirm the lock. Recheck the recline indicator and tightness.

Forward-Facing Installation and the Top Tether

When the child outgrows rear-facing limits, or meets the seat's minimum requirements for forward-facing and you choose to switch, the base is reinstalled in forward-facing configuration. That usually means a different recline setting and, for belt installs, the forward-facing belt path.

The top tether is a strap from the top or back of the car seat to a dedicated anchor in the vehicle. That anchor is often on the rear shelf, the seat back or the cargo floor, and your vehicle manual identifies it. In the US, using the top tether for every forward-facing harnessed installation is the standard recommendation, because it reduces how far the child's head moves forward in a crash. Attach it, remove slack and tighten it after the base is secured. Whether your specific Cybex model uses a tether, load leg or other anti-rotation device rear-facing depends on the version, so check its manual.

Using the Rotation Feature Safely

Rotate the shell toward the door only while the vehicle is parked. After loading the child, turn the shell back until it clicks into the travel position for your chosen orientation. Check any lock or color indicators before driving. A seat left partially rotated is not in a crash-tested position. Some models restrict which directions are allowed in each installation mode. Follow the labels on the base.

Checking the Installation

Hold the base at the belt path you used, whether lower anchor connectors or seat belt, and tug side to side and front to back. The widely used guideline is that the seat should not move more than about an inch at that point. Movement at the top of the shell is normal and not part of this test. Then confirm the recline indicator is within the correct range for the child's orientation.

Harness Fit

A correct restraint installation also requires a correct harness fit for the child. The adjustment points are the same as on most US harnessed seats, though how you move the headrest and straps varies by model.

Rear-facing: harness straps should come from slots at or just below the child's shoulders. Forward-facing: straps should be at or just above the shoulders. The chest clip should sit at armpit level, not on the belly or neck. Tighten until you cannot pinch a horizontal fold of webbing at the child's collarbone. Avoid bulky coats or aftermarket inserts that are not approved by the seat maker, since they can create hidden slack.

Common Mistakes to Avoid

Using lower anchors and the seat belt together when the manual does not allow it. Routing the seat belt through the wrong orientation's belt path. Forgetting to lock the vehicle seat belt or engage the lock-off. Leaving the load leg off the floor or resting on an unsupported storage cover. Skipping the top tether in forward-facing mode. Driving with the shell not fully locked after rotating it.

When to Get Hands-On Help

If you can't get the base under an inch of movement, can't find the approved anchors, or aren't sure your recline is correct, a certified Child Passenger Safety Technician (CPST) can check the installation with you in your own vehicle. Cybex customer service can also confirm details specific to your model and production date, such as limits, approved accessories and how to use the anti-rotation features.