We aren't talking about a huge number of vehicles here. The Rapide and Vanquish comply with the new rules, and Aston Martin predicts that it would import 670 Vantage and DB9 models into the States between September 1, 2014 and August 31, 2017. The automaker estimates it would cost around $30 million to make them compliant.
The company has indeed been in rough shape in the not-too-distant past. According to the documents, sales volume decreased by about 48 percent from a high of 7,281 units in 2007 to 3,786 vehicles in 2012. The automaker had planned to have new models ready in time so that it wouldn't need an exemption, but the global economic crisis delayed it. Interestingly, the paperwork reveals that Aston currently plans to launch a replacement for the DB9 between September 2016 and August 2017.
Aston Martin doesn't have very long for NHTSA to deliberate. The new rules go into effect for them on September 1, 2014 for hardtops, and September 1, 2015 for convertibles. While it would still be able to sell its other models here, it would certainly be a shock if it had to pull the the Vantage and DB9. Both documents are available in PDF format to download and read.