KW Variant 3 inox-line Coilovers for BMW 1 Series M135i and M140i F20 F21 2WD with electronic dampers (chassis codes 1K2, 1K4). Transform your BMW 1 Series handling, stance and ride quality with the ultimate performance suspension upgrade. KW V3 coilovers deliver height adjustable suspension with independent rebound and compression damping for road, fast-road and track. If you are searching for BMW M135i coilovers, BMW M140i coilovers, F20 coilovers, F21 coilovers, KW V3 coilovers or KW Variant 3 suspension for 1 Series, this is the proven, premium choice.
Why choose KW V3 for your BMW M135i / M140i
- Independent damping adjustment: 16 clicks of rebound and 12 clicks of compression for precise handling and comfort tuning
- Stainless steel inox-line construction for long-term durability and rust-free performance in UK weather
- Continuous ride height adjustment to perfect stance and weight distribution
- Developed and tested on road, motorway and the Nürburgring for outstanding control and compliance
- Benchmark coilover performance trusted by sports car drivers and well-known tuners worldwide
- High quality components with comprehensive documentation for straightforward setup
Lowering range and axle loads
- Lowers front: 25 to 50 mm
- Lowers rear: 30 to 55 mm
- Max. allowed axle weight in kg: Front 921 to 1090, Rear up to 1230
Fitment
- BMW 1 Series M135i / M140i
- Chassis: F20 and F21
- Drivetrain: 2WD
- For vehicles with electronic dampers
- Chassis codes: 1K2, 1K4
What makes KW Variant 3 special
KW V3 gives you the freedom to dial in your suspension for your exact driving style. Use the rebound adjuster to fine-tune body control and comfort, and the compression adjuster to sharpen turn-in, reduce roll and maximise grip without changing springs. Thanks to the patented low-speed compression valve at the base of the damper, you can make track-ready changes quickly and accurately, no tools required. The result is tighter high-speed stability, improved traction out of corners and a compliant ride on British roads.
KW engineers validate every setting on a 7-post rig and in exhaustive real-world testing. The twin-tube dampers, stainless steel struts, dirt-resistant trapezoid threads and composite spring perches ensure smooth height adjustment and consistent performance year after year.
Motorsport DNA, road comfort
Technology filtered from top-level series such as ADAC GT Masters, FIA GT1, FIA GT3, International GT Open, WTCC, VLN and the 24h Nürburgring means KW V3 coilovers deliver genuine motorsport response with everyday drivability. If you have already uprated wheels and tyres, brakes or power, KW Variant 3 will unlock the chassis balance your BMW 1 Series deserves.
Our experience and customer feedback
We run KW V3 on our own builds and our customers consistently report a night-and-day improvement in steering precision, cornering grip and ride quality. The independent rebound and compression adjustment makes it easy to set up for daily driving during the week and track days at the weekend.
Key features at a glance
- Rebound and compression damping adjustable damper technology
- Adjustable rebound damping with 16 precise clicks
- Adjustable compression damping with 12 precise clicks
- Stainless steel technology inox-line, 100 percent rust-free
- Individual, continuous lowering within tested adjustment range
- High quality components for long life
- Complete documentation for easy handling
Quality and warranty
Each KW Variant 3 inox-line kit undergoes stringent quality control. When installed by a KW specialist dealer, KW offers up to a five-year warranty on the V3 coilover kit.
Professional fitting and setup
For expert installation and setup in the UK, we recommend fitting at Nforcd in Warwickshire. We can set ride height and initial damping to suit fast-road or track use. Request a fitting quote at Sales@nforcd.com.