The ID.4’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The EX30 doesn’t offer pre-crash pretensioners.
Both the ID.4 and EX30 have child safety locks to prevent children from opening the rear doors. The ID.4 has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The EX30’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The Volkswagen ID.4’s rear backup camera has a standard washer for maintaining a clear view under various conditions. In contrast, the Volvo EX30 does not offer a rear camera washer, meaning its effectiveness relies on manual cleaning by the user when necessary.
Both the ID.4 and the EX30 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, driver alert monitors and available around view monitors.
The Volkswagen ID.4 weighs 424 to 966 pounds more than the Volvo EX30. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

