CarPlay iOS 18.4 Improvements: What's New and What You Need to Know

Apple's iOS 18.4 update arrived in early April 2025 with some meaningful CarPlay improvements. But it wasn't all smooth sailing. The update added a third row of app icons for larger displays, sports app integration, and EU navigation flexibility. However, it also brought connectivity problems that frustrated drivers across multiple vehicle brands.

Let's walk through everything that changed with CarPlay in iOS 18.4. The good stuff and the headaches.

Key Takeaways

• iOS 18.4 adds a third row of app icons on CarPlay, but only for vehicles with displays larger than about 10 inches
• A new sports API lets apps show live scores and game info during audio playback (once developers add support)
• EU users can finally set Google Maps or Waze as their default navigation app for Siri voice commands
• The update introduced connectivity issues for many users, affecting displays and causing connection failures
• iOS 18.4.1 and later iOS 18.5 releases fixed most of the critical bugs
• Electric vehicle owners with Ford vehicles gained better Tesla Supercharger integration in Apple Maps

The Third Row Feature: More Icons on Bigger Screens

The most visible change in iOS 18.4 is simple. If your vehicle has a large enough screen, CarPlay now displays three rows of app icons instead of two.

This improves the experience. Instead of swiping between screens to find your podcast app or weather widget, you can see up to 12 apps at once on compatible displays. Less time looking at your screen while driving means more time watching the road.

Which Vehicles Get the Third Row

Here's the catch. The third row only appears on vehicles with displays larger than 10 inches diagonally. Testing confirmed that vehicles like the Toyota Tundra with its 14-inch display show all three rows. The Honda Civic's 9-inch screen sticks with the original two-row layout.

Your vehicle's system reports its display specs to your iPhone during CarPlay connection. Based on those specs, iOS 18.4 automatically decides whether to show two or three rows. You can't manually turn this on or off.

Most drivers won't see any interface changes after updating to iOS 18.4. If you drive an older vehicle or one with a standard-sized display, your CarPlay home screen will look exactly the same. But if you want to upgrade your vehicle's display, our premium Android head units or Tesla-style screens offer larger displays with full CarPlay compatibility.

Why Apple Limited This Feature

Apple based the third row on pixel density and resolution, not just screen size. Higher pixel density means interface elements need to be larger to stay readable, which reduces the space for additional content.

Some users wonder why Apple didn't provide a manual toggle to enable the third row on smaller displays. The company likely prioritized interface consistency and readability, following their typical approach of making these decisions for users.

Sports Integration: Live Scores Come to CarPlay

iOS 18.4 introduced a new developer API called CPNowPlayingModeSports. This lets sports apps display real-time game information in the Now Playing interface.

How Sports Mode Works

When you're listening to a live game through a compatible app, CarPlay can now show team logos, live scores, game clocks, and possession indicators alongside your playback controls. The interface is designed for two-team sports, with information split between the left and right sides and team imagery in the background.

The API includes smart features like automatic clock functionality that counts up or down from a set starting point. It also supports time-shifting during recorded game playback. When you jump to a different point in a recorded game, the sports info updates to match that moment.

Developer Adoption Timeline

Here's the thing: sports integration requires developers to add the new API to their apps. As of mid-2025, adoption has been gradual. Major sports apps including ESPN platforms, Apple's Sports app, and various regional sports networks are working on CarPlay compatibility. But the rollout extends beyond iOS 18.4's initial release date.

We tested several sports apps in the months following the update. Some added the feature quickly. Others took longer to get through Apple's app review process and testing requirements.

The practical benefit is clear for sports fans who commute during game times. You can stay updated on live scores during your drive without pulling over or taking your eyes off the road. The setup maintains CarPlay's safety-first approach by showing key information rather than video streams that would distract drivers.

Default Navigation Apps in the EU

For European Union users, iOS 18.4 brought the biggest functional change: the ability to set a default navigation app other than Apple Maps.

Why This Matters

Before iOS 18.4, when you asked Siri to navigate somewhere while using CarPlay, your iPhone always launched Apple Maps. This happened regardless of which navigation apps you had installed. Voice commands like "Take me to Vienna" or "Navigate to the nearest gas station" only used Apple's mapping service.

This frustrated users who preferred Google Maps' traffic data or Waze's community-driven incident reporting. You could manually open other navigation apps through CarPlay's app grid, but you couldn't use voice commands.

iOS 18.4 changes this for EU residents. You can now open iPhone Settings, go to Apps → Default Apps → Navigation, and select Google Maps, Waze, or other compatible navigation services. Once set as your default, Siri navigation requests automatically launch your chosen app instead of Apple Maps.

The EU Regulatory Context

This feature exists only because of the European Union's Digital Markets Act. The law requires dominant tech companies to give users more control over default apps. Apple made the minimum changes needed for compliance rather than extending the feature globally.

Users in North America, Asia, and other regions outside the EU still can't change their default navigation app for Siri voice commands.

Implementation Quirks

Some EU users reported that the default navigation setting doesn't always work perfectly. In certain cases, Siri launched the most recently used navigation app rather than the selected default. This seems to involve complex interactions between the default app setting and the system's habit of choosing recently-used apps.

Despite these occasional issues, the feature represents real progress for EU CarPlay users who've long requested this capability.

Electric Vehicle Charging Gets Smarter

iOS 18.4 included a feature specifically valuable for electric vehicle owners: better support for the North American Charging Standard (NACS) in Apple Maps.

What Changed for EV Owners

Ford started providing NACS adapters that let Mustang Mach-E and F-150 Lightning owners charge at Tesla Superchargers. But Apple Maps initially couldn't include these charging stations in trip planning because it didn't recognize the compatibility.

The iOS 18.4 update fixed this. Apple Maps now understands that certain vehicle models can use NACS charging with adapters. When planning routes, the system can include Tesla Superchargers as charging options and displays warnings like "Tesla NACS Adapter Required" so you know what you'll need before arriving.

This fixes a real frustration for early NACS adapter users. Rather than using separate navigation or charging planning apps, Ford EV owners can now use Apple Maps for efficient trip planning that includes North America's largest charging network.

The Connectivity Crisis That Followed

While iOS 18.4's new features generated excitement, the update also introduced technical problems that undermined the user experience for many drivers.

What Went Wrong

Within hours of iOS 18.4's public release in early April 2025, user forums filled with reports of CarPlay problems. The issues fell into several categories, all serious enough to disrupt daily driving.

The most common issue involved instrument cluster displays. Many vehicles integrate CarPlay with the driver-facing instrument panel, showing currently playing music, artist information, and playback controls. After updating to iOS 18.4, this information stopped appearing on instrument clusters. It still worked normally on center console displays.

This affected many vehicle models across multiple manufacturers. Users with 2025 Honda Civic Hybrids, 2025 Mazda CX-30s, various Volkswagen vehicles, 2023 Audi S3s, and 2023 Nissan Frontiers all reported the same problem. The widespread nature across different manufacturers suggested a system-wide issue. If you're experiencing these issues, upgrading to a modern aftermarket solution like our wireless CarPlay modules can provide more reliable connection.

Connection Failures

Beyond instrument cluster issues, many users experienced complete CarPlay connectivity failures. Some described their iPhones repeatedly connecting and disconnecting rapidly, creating an unusable experience. Others reported needing to plug and unplug their phones five or more times, or restart their vehicles multiple times, before CarPlay would work.

One Honda Civic owner documented needing to disconnect and reconnect their iPhone "5+ times or restart the car to get CarPlay to connect." A Mazda CX-30 owner reported nearly identical experiences, with both wireless and wired connections affected.

Standard fixes often didn't work initially. Restarting iPhones, restarting vehicles, and unplugging USB connections didn't help many users. Some found that completely forgetting the vehicle from CarPlay settings and re-pairing from scratch helped, though even this didn't work for everyone.

Apple Intelligence and VPN Correlations

Community troubleshooting revealed interesting patterns. Some affected users had Apple Intelligence enabled on their devices, while unaffected household members with identical vehicle models but without Apple Intelligence didn't experience CarPlay problems. This suggested that Apple Intelligence might interact negatively with CarPlay in certain setups.

Separately, users discovered that VPN apps, particularly ExpressVPN, that started automatically after the iOS 18.4 update were interfering with CarPlay connectivity. One user found that stopping ExpressVPN, which had automatically launched, immediately restored CarPlay.

These observations suggest iOS 18.4 introduced changes affecting how VPN apps and advanced AI features interact with CarPlay connectivity systems.

Apple's Response and Fixes

Apple acknowledged at least one connectivity issue through iOS 18.4.1, released in mid-April 2025. The update specifically addressed "a rare issue that prevents wireless CarPlay connection in certain vehicles."

However, the release notes' description of the problem as "rare" contrasted with widespread reports across many vehicle brands. The wireless-specific fix suggested some connectivity issues related specifically to wireless CarPlay, while others affected both wired and wireless connections.

The Path to Stability

User reports indicated that iOS 18.4.1 provided limited improvements but didn't fully fix broader connectivity and compatibility issues. Continued problems through April and May made it clear that additional fixes were needed.

iOS 18.5 beta releases during May 2025 showed significantly improved CarPlay functionality. Users testing beta versions reported that most iOS 18.4 CarPlay issues were resolved. By the time iOS 18.5 reached public release in May 2025, most of the severe connectivity problems appeared fixed for most users.

This resolution timeline meant users who updated to iOS 18.4 in early April faced six to eight weeks of potential CarPlay problems before iOS 18.5's public release provided comprehensive fixes.

Community Workarounds and Solutions

While waiting for official fixes, the CarPlay user community developed effective troubleshooting approaches.

The Most Reliable Fix

The most successful workaround involved completely clearing CarPlay pairings and Bluetooth connections, then re-pairing from scratch. The detailed procedure included:

• Opening iPhone Settings and going to Bluetooth
• Finding your vehicle, tapping the info icon, and selecting "Forget This Device"
• Going to Settings → General → CarPlay, selecting your vehicle, and choosing "Forget This Car"
• Clearing all saved WiFi networks through Settings → General → Reset → Reset Network Settings
• Restarting both your iPhone and vehicle
• Reconnecting to CarPlay through your vehicle's interface

This comprehensive reset took 15 to 30 minutes to complete, but many users reported success rates exceeding 80 percent.

Siri Settings Check

Another effective approach involved ensuring Siri was properly enabled. Users discovered that CarPlay connectivity often failed if "Hey Siri" activation was disabled, "Enable Siri When Locked" was turned off, or "Type to Siri" was deactivated.

Re-enabling all Siri functions through Settings → Siri & Search and making sure all three Siri modes were active fixed connectivity problems for some users. This suggested iOS 18.4 introduced tighter connections between Siri functionality and the CarPlay system.

What This Means for CarPlay's Future

The iOS 18.4 experience shows both the potential for CarPlay improvements and the challenges of maintaining compatibility across different automotive platforms.

CarPlay 2 and Beyond

These updates must be understood within the context of Apple's long-delayed CarPlay 2 initiative. Originally announced with promises of fundamental changes including multi-display support and deeper vehicle system integration, CarPlay 2's development has extended significantly beyond initial delivery targets.

CarPlay Ultra, announced for luxury vehicles from manufacturers including Aston Martin beginning in May 2025, represents a premium variant with advanced capabilities. This creates a multi-tier CarPlay landscape where standard CarPlay receives updates while next-generation features roll out gradually through premium implementations.

The iOS 18.4 improvements represent meaningful progress within CarPlay's existing limits. These changes make the current generation more usable while longer-term next-generation solutions continue development. For vehicles that don't support the latest CarPlay features natively, our brand-specific CarPlay upgrades offer a practical solution to bring modern connectivity to older systems.

Quality Assurance Challenges

The connectivity issues following iOS 18.4's release revealed gaps in Apple's quality assurance processes. Each vehicle manufacturer implements CarPlay differently, with varying communication protocols and integration approaches. Testing iOS updates against even a representative subset of these implementations requires substantial resources.

The failure to catch these problems before public release suggests either insufficient QA resources or misaligned priorities. As CarPlay integration deepens and eventually transitions to architectures like CarPlay Ultra, the consequences of compatibility problems increase substantially.

Should You Update to iOS 18.4?

If you're still running an earlier iOS version and considering whether to update specifically for CarPlay improvements, here's our practical advice.

Update If You Have

• A vehicle with a display larger than 10 inches that will benefit from the third row of icons
• An electric vehicle (specifically Ford Mustang Mach-E or F-150 Lightning with NACS adapter) that needs improved charging network integration
• A location in the EU and strong preference for Google Maps or Waze over Apple Maps
• Interest in sports apps and willingness to wait for developer adoption of the sports API

Consider Waiting If You

• Have a standard-sized display that won't show the third row
• Live outside the EU and don't need the other specific features
• Prioritize absolute CarPlay stability over new features
• Can wait for iOS 18.5 or later versions that have addressed the reported connectivity issues

Most users at this point should be running iOS 18.5 or later, which includes the CarPlay bug fixes. If you're still on iOS 18.3 or earlier, we recommend updating directly to iOS 18.5 or the latest available version rather than stopping at iOS 18.4.

Looking Ahead

Apple continues developing CarPlay through successive iOS updates. iOS 19, expected to debut in June 2026, will likely include additional CarPlay improvements based on what Apple previews at WWDC 2026.

The iOS 18.4 experience demonstrates that while CarPlay improvements deliver genuine value when working properly, implementation quality matters enormously. The update's combination of useful features and significant technical problems created a complex situation where some users benefited substantially while others experienced reduced functionality.

For the broader CarPlay ecosystem, iOS 18.4 represents both a milestone in the platform's evolution and a reminder about the necessity of prioritizing reliability alongside feature additions. As vehicles become more connected and CarPlay integration deepens, Apple must balance the desire for continued innovation with the absolute requirement that critical automotive functionality remains stable and dependable.

The success of this balance will significantly influence user confidence in Apple's automotive technology platform as CarPlay Ultra expands and deeper vehicle integration becomes commonplace. For drivers looking to upgrade their current systems with reliable CarPlay functionality, exploring our vehicle-specific CarPlay solutions can provide a stable alternative to waiting for software updates.

Frequently Asked Questions

Does iOS 18.4 add a third row of icons to all CarPlay displays?

No, the third row only appears on vehicles with displays larger than about 10 inches diagonally. Your vehicle's system automatically reports its specs to your iPhone, and iOS 18.4 uses this information to determine whether to show two or three rows. Most vehicles with standard 8-9 inch displays continue showing only two rows of icons. If you want to upgrade to a larger display that supports the third row, check out our Tesla-style screens that offer displays up to 15 inches.

Can I set Google Maps as my default navigation app in CarPlay with iOS 18.4?

Only if you're located in the European Union. iOS 18.4 introduced default navigation app selection only for EU users due to Digital Markets Act requirements. Users in North America, Asia, and other regions outside the EU still can't set alternative navigation apps as their default for Siri voice commands.

What should I do if CarPlay stopped working after updating to iOS 18.4?

Start by completely forgetting your vehicle from both CarPlay and Bluetooth settings, then re-pair from scratch. This involves going to Settings → Bluetooth and forgetting the device, then Settings → General → CarPlay and forgetting the car, followed by restarting both your iPhone and vehicle before reconnecting. Also make sure all Siri functions are enabled in Settings → Siri & Search. If problems continue, consider updating to iOS 18.5 or later, which addressed most connectivity issues. Alternatively, upgrading to a modern wireless CarPlay module can provide more reliable connectivity.

Which sports apps support CarPlay's new sports mode?

Developer adoption has been gradual since iOS 18.4's release. Major platforms including ESPN, Apple Sports, and various regional sports networks are implementing support, but not all sports apps have added CarPlay sports mode yet. Check your specific app's update notes or contact the developer to confirm whether they've implemented the CPNowPlayingModeSports API.

Will the third row of icons eventually come to smaller displays?

Apple hasn't announced plans to extend the feature to smaller displays. The limitation is based on pixel density and display resolution rather than arbitrary restrictions, suggesting Apple prioritized readability and interface consistency over maximum flexibility. As vehicle manufacturers continue installing larger displays in new models, more users will naturally gain access to the third row feature over time.

Are the iOS 18.4 CarPlay problems fixed now?

Most of the critical connectivity and stability issues were addressed in iOS 18.5, which reached public release in May 2025. Users running iOS 18.5 or later versions report significantly improved CarPlay functionality compared to the initial iOS 18.4 release. If you experienced problems with iOS 18.4, updating to the latest available iOS version should resolve most issues.

Does iOS 18.4 affect CarPlay battery drain?

iOS 18.4 doesn't appear to substantially worsen the battery drain that some users experience during CarPlay usage. Battery performance testing shows variable results based on specific usage patterns and device setups. Users who rely heavily on CarPlay navigation may notice faster battery depletion, but this existed before iOS 18.4 and wasn't significantly changed by the update.

Can I use Tesla Superchargers with Apple Maps after updating to iOS 18.4?

Only if you have a compatible electric vehicle with NACS adapter support, currently limited to Ford Mustang Mach-E and F-150 Lightning models with Ford's NACS adapter. For these vehicles, Apple Maps now includes Tesla Superchargers in route planning and displays appropriate warnings about adapter requirements. Other manufacturers' EV models will gain access as they introduce compatible vehicles or software updates.