From Features to Systems: Rethinking Vehicle Access

More Than Just Features

On the surface, it looks like a feature story. Power doors. Soft-close. Phone-as-key. Gesture controls. Obstacle detection. Powered frunks.

But the bigger shift is happening underneath.

Core hardware like power drive units and spindles are still evolving to meet durability, packaging and performance needs. That part is still very real.

What’s changed is that a lot of the functionality now sits in software.

How a door opens. How it closes. How it reacts if something is in the way. Even the perceived “feel” of the interaction is increasingly being defined through software control, not just mechanical design.

So instead of just engineering components, teams are now engineering behavior.

Software is Reshaping the System

As access systems become more software-controlled, the role of electronics and algorithms is expanding quickly.

Features like haptic feedback or obstacle detection aren’t standalone add-ons. They rely on tightly integrated hardware and software working together consistently across different conditions and vehicle platforms, which is also driving tighter mechanical tolerances to help make behavior repeatable and predictable.

In many cases, that integration can originate from multiple suppliers, which makes alignment across hardware, software and controls critical, especially as motion behavior increasingly depends on precise motor control and mechanism design working together.

That puts more pressure on the system to behave consistently. Across different environments. Different use cases. Different regions.

Because when something as basic as opening a door feels off, people notice immediately.

Where Complexity is Actually Coming From

At the same time, external pressures are adding another layer.

Cybersecurity is now a baseline requirement, which brings added hardware security, more complex software architectures, and significantly more validation. That increases both cost and development effort, but it’s non-negotiable.

On top of that, requirements are diverging by region. In some markets, OEMs are pushing for greater transparency and control over software, including more open or “white-box” approaches. That shift introduces a new balancing act between flexibility and the discipline required to create consistent, validated system performance and security.

That creates tension.

OEMs are looking for flexibility and control, while also expecting fully integrated, validated systems that deliver consistent performance and safety across platforms.

Balancing those expectations is becoming more challenging.

From Components to Coordination

All of this points to a shift in how access systems need to be approached.

It’s no longer a latch problem. Or a door problem. Or even a software problem on its own. It’s a coordination problem.

Every interaction, from opening and closing to sensing and reacting, depends on multiple systems working together.

When those elements are developed independently, complexity doesn’t just add up, it multiplies. It shows up in higher ECU counts, increased wiring mass, more intensive validation requirements, and greater cybersecurity exposure, creating real challenges for cost, scalability, and consistent system performance.

That’s why architecture is becoming more important.

As vehicles move toward more centralized and zonal electrical systems, access functions need to be managed more cohesively across hardware, software, and control logic. Not just to reduce complexity, but to support consistent performance across the vehicle.

The Opportunity Ahead

Vehicle access may not be the headline feature, but it’s one of the most frequent and tangible interactions people have with their vehicle, and often the first impression that sets the tone for the experience.

And increasingly, it reflects how well the overall system is working.

While adding more features can enhance the user experience, leveraging a single supplier helps these features offer a more convenient and safer experience for the consumer—seamlessly integrated, coordinated, and managed as a cohesive system. This integrated approach transforms complexity into a strategic advantage, enhancing performance and delivering a superior, more reliable experience.

If you want to go deeper, we’ve explored the shift from designing vehicles part by part to engineering them as integrated systems.

And if you’re working through how those challenges show up in vehicle access systems, it’s a conversation worth continuing.