The reports say manufacturers including Mercedes-Benz, Volvo, Hyundai and Pioneer have all either adjusted their release dates for Apple's CarPlay or just let those dates pass by without an announcement.
We first reported back on CarPlay in March when Apple went to great lengths to build hype for "the best iPhone experience on four wheels."
“iPhone users always want their content at their fingertips and CarPlay lets drivers use their iPhone in the car with minimized distraction", said Greg Joswiak, Apple’s vice president of iPhone and iOS Product Marketing, at the time.
“CarPlay has been designed from the ground up to provide drivers with an incredible experience using their iPhone in the car.
“We have an amazing line-up of auto partners rolling out CarPlay, and we're thrilled it will make its debut this week in Geneva.”
The cars' steering wheels will each come equipped with a voice control button, which then activates Siri, Apple's voice control software. Apple also said the service can predict destinations based upon addresses found in your email, texts, contacts, and calendars.
Additionally, it will allow users to play music through the car's speakers, either with iTunes Radio, the iPhone's music tracks or using a number of third-party music-streaming apps including Spotify, Stitcher, iHeartRadio, and Beats Radio.
A spokesperson for Mercedes-Benz confirmed to 9to5Mac it will not be achieving its 2014 release target for the CarPlay feature.
"As of now, we do not support CarPlay in our series production cars," the company said. "We are working on a highly sophisticated head-unit based solution, which will enable CarPlay as well as other systems (e.g. MirrorLink)… we are not quite sure if we will feature an aftermarket solution. CarPlay won’t be available by the end of this year, but in 2015."
Volvo also confirmed its new release target of 2015, writing "As of the launch of the All-New Volvo XC90, we will be offering preparation for Apple CarPlay. Full CarPlay functionality will be available later in 2015."
Hyundai is still planning to deliver the feature by the end of the year, but started selling its 2015 Sonatas in May but without the feature.
Pioneer planned to update its aftermarket systems back in May but has been completely silent on the issue so far.
Other manufacturers linked to CarPlay include Ford, BMW, Audi, Jaguar/Land Rover, Toyota and Nissan - each have yet to outline their plans.
And no word on an Australian release date for what it's worth, either.