Tailgate supports don't last forever. They can age slowly or fail suddenly with rapid temperature changes. You'll realize the failure immediately when the lid suddenly contacts you -- usually in the head. Then you'll get your next shock. The cost for a pair of OEM gas springs can quite costly, buy our reasonably priced aftermarket replacements and save money.
We use Stabilus for an aftermarket option for hood and trunk struts on a wide range of Volvo's.
We have used them for countless years and stand by the product for your Volvo.