The Bilstein B4 22-151070 is a front twin-tube strut assembly from Bilstein's B4 OE-replacement line, designed to match factory geometry. The manufacturer describes the B4 as a direct-fit, per-axle replacement built to the OE design, so it installs like the original without modification. Its main advantage over a cheaper aftermarket strut is that it restores factory ride height and tuning, so a 2.0T Passat owner replacing tired or leaking struts gets back stock handling and not a lowered or re-tuned feel. For buyers searching for an OE-spec Bilstein B4 front strut, this is the ride-quality option.
Fitment is the first thing to confirm. Listings for this part number disagree on model years and suspension trim, so verify the application against your VIN with the manufacturer before ordering, especially if the car has a non-standard suspension setup. The manufacturer says installation information is linked to each part number in its online catalog and that the B4 should be fitted following the vehicle manufacturer's instructions. If you are weighing a B4 against a B6 Passat strut, note that the manufacturer positions the B6 as a firmer, sharper-handling upgrade that keeps OE ride height, while the B4 is the stock-feel choice.
The manufacturer describes the B4 as direct-fit and states that it needs no modification to install.
The manufacturer says the B4 restores factory ride height and tuning, while the B6 is an improved OE replacement with firmer, Bilstein-tuned damping for sharper body control and still keeps OE ride height.
Owners on user forums describe front strut replacement on Passat generations of this type as a moderate-to-difficult job, with one discussion estimating roughly 2 to 5 hours depending on tools and rust. Forum users report that the steering knuckle or upright generally has to come off, that a spring compressor is required, and that a quality compressor matters because cheap ones can slip. Expect metric sockets from roughly 10mm to 18mm. Watch for a rusted pinch bolt, and note that a retaining clip can hold the strut in place even after the mounting bolts are removed. Follow the manufacturer's installation instructions for torque values rather than forum figures, and have the alignment checked after the job.
