The Bilstein B6 24-102520 is a rear monotube shock built on Bilstein's gas-pressure design, tuned firmer than stock and meant to work with the factory springs at original ride height. The manufacturer describes it as the bolt-on performance upgrade for your stock suspension: the yellow monotube gas-pressure shock, tuned firmer than OE. It sharpens control and grip on your existing springs, at the original ride height. For a Saab 9-3 owner, that means firmer rear damping and better stability without buying a lowering kit or new coil springs.
Choose the B6 over a stock replacement when you want more control in corners and under load. The manufacturer says that on most models the B6 uses a monotube layout with a working piston about 63% larger than a twin-tube, for sharper, more consistent damping control. Each unit also goes through long-term endurance, salt-spray and scratch testing, plus a 1:1 functional check before delivery, which supports its durability claims. Search terms that match this part include Saab 9-3 rear monotube shock, Bilstein B6 24-102520 upgrade, gas-pressure rear shock for OE springs, and firmer rear damping Saab 9-3.
Yes. The manufacturer states that the B6 can be fitted per axle, so a rear-only install is supported.
No. The manufacturer says the B6 is designed to keep your existing springs and works at original ride height without lowering. Series springs can continue to be used.
User forums report that the lower mounting bolt is under high torque and is commonly replaced with a new bolt, and that applying anti-seize to the lower bolts helps during reinstallation. Owners also report that upper shock mounts can deteriorate when removed and are often replaced at the same time.
Owners on user forums describe the rear job as a manageable driveway project. The lower bolt passes through the shock and the sway bar area, so it can seize and may need to be replaced, and a helper can make lining up the bottom eye much easier. Forum posters report that a basic socket set, a set of external Torx or 18 mm style sockets, and a jack and stands are generally enough, with a first-timer taking around two hours per side. On hatchbacks, the upper mounts are reached through the cargo area, so you may need to pull back the carpet. Confirm the lower bolt torque and tool sizes against the manufacturer's service information before you start.
