You can get your shock absorbers replaced at any independent workshops as well as specialist suspension workshops. You will need to select a shop that can also perform a wheel alignment, as this will need to be carried out whenever suspension work is performed on your vehicle.
Most manufacturers recommend that shock absorbers are at least replaced in pairs, so the front or rear respectively. Replacing one pair may upset the handling or balance of the vehicle, so it is best to replace all shock absorbers to return the vehicle to like-new condition.
Your driving style, the roads you drive on and the loads you carry all impact the shock absorbers life expectancy - so there is no steadfast answer to this question. However, shock absorbers are recommended to be inspected every service and suspension experts recommend replacement every 80,000km - 100,000km or six years.
There are three basic types of shock absorbers available for most modern-day vehicles;
- Mono tube
- Twin tube
- Gas filled
They are essentially the same thing. A shock absorber is designed to absorb the energy stored by the suspension spring when going over bumps. These shock absorbers can be separate from a spring or be located inside the spring. A strut is where the spring sits in a specially designed housing which is fixed to the shock absorber, reducing the amount of space needed.