The Problem: iOS 18 Noise Suppression vs. Vehicle Systems
What"s Happening?
INEOS engineering teams have conducted extensive testing and discovered that Apple"s iOS 18 noise suppression enhancements conflict with vehicle infotainment systems. The issue specifically affects:
- iPhone users running iOS 18 or newer (testing conducted through iOS 18.3.2)
- All INEOS Grenadier model years, include the Fieldmaster, Trialmaster and the Quartermaster pickup
- Both connection methods: Bluetooth and Apple CarPlay
- Other vehicle brands have reported similar issues with their vehicles
Symptoms You May Experience
Many INEOS Grenadier and Quartermaster owners have reported two primary issues:
- Excessive background noise during phone calls
- Intermittent audio disruptions that make conversations difficult
The Good News: There"s an Easy Fix
Immediate Solution: Enable Voice Isolation
You can significantly improve your INEOS Grenadier"s phone call quality right now by enabling “Voice Isolation” mode on both iPhones involved in the call:
1. Access your iPhone"s Control Center
2. Enable "Voice Isolation" mode
3. Ask the other caller to do the same if they"re also using an iPhone if possible.
This simple setting change effectively eliminates the call quality issues.
Alternative Communication Apps Work Fine
Interestingly, communication applications like Microsoft Teams and WhatsApp don"t experience these problems in INEOS Grenadier vehicles. These apps use cloud-based noise suppression technologies that don"t conflict with the vehicle"s systems.
Your INEOS Grenadier"s Technology Isn"t the Problem
It"s important to understand that your Grenadier"s infotainment system features state-of-the-art noise suppression algorithms and advanced chipsets. The issue stems from an unexpected interaction between Apple"s iOS 18 updates and vehicle connectivity systems across multiple automotive brands.
What INEOS Is Doing About It
Current Actions
INEOS Automotive"s engineering team is actively:
- Investigating potential long-term improvements
- Working to define a strategic approach for future solutions
- Conducting ongoing compatibility testing with various devices
The Challenge
Smartphone manufacturers like Apple operate independently and release software updates without coordinating with automotive manufacturers. While INEOS conducts extensive testing with various devices, unforeseen interactions between software updates and vehicle systems can still arise.
What This Means for INEOS Grenadier Owners
No Vehicle Defect
This is not a manufacturing defect or quality issue with your INEOS Grenadier. Your vehicle"s infotainment system is functioning as designed.
Simple Workaround Available
The Voice Isolation fix provides an immediate solution while INEOS works on long-term improvements.
Continued Support
Our Sales and Service Teams at Red Noland INEOS Grenadier remains committed to supporting our customers through any technical challenges that arise from third-party software updates. If you need to stop in for a quick question answered or you need to Schedule Service, we"re here and ready to assist! If you"re in Colorado, stop by and say hi, we love meeting Grenadier owners from all over North America!
This information is based on official INEOS Automotive Service Bulletin AS4-25 dated August 8, 2025. For the latest updates and technical support, contact Red Noland INEOS Grenadier in Colorado Springs.