The Beetle has standard Automatic Post-Collision Braking System, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 124 Spider doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
Compared to metal, the Beetle’s plastic fuel tank can withstand harder, more intrusive impacts without leaking; this decreases the possibility of fire. The Fiat 124 Spider has a metal gas tank.
The Beetle SE has standard Car-Net, which uses a global positioning satellite (GPS) receiver and a cellular system to get turn-by-turn driving directions, remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The 124 Spider doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.
Both the Beetle and the 124 Spider have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, available blind spot warning systems, rear parking sensors and rear cross-path warning.
The Volkswagen Beetle weighs 504 to 836 pounds more than the Fiat 124 Spider. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts. Crosswinds also affect lighter cars more.

