KW V2 Coilovers - 1-series M135i / M140i (F20, F21); (1K2, 1K4) 2WD; with electronic dampers

Transform the way your BMW 1 Series drives with this premium height-adjustable suspension kit engineered for the M135i and M140i on the F20 and F21 platform. Designed for rear-wheel-drive cars with factory electronic damping, this inox-line setup delivers sharper handling, improved ride quality on British roads, and a purposeful stance without sacrificing everyday comfort. Expect tighter body control, better traction out of corners, and a confident, composed feel at speed.

If you are searching for a BMW M135i suspension upgrade, BMW M140i lowering kit, F20 F21 adjustable suspension, or a fast-road coilover package that balances performance and comfort, this is the go-to choice. It is a superb option for daily driving, spirited B-road blasts, and occasional track days.

Why enthusiasts choose this setup

• 16-step rebound tuning for tailored ride comfort and handling precision
• Continuous ride height adjustment for dialled-in stance and balance
• Stainless steel struts with corrosion-resistant components for long-term durability
• Twin-tube damper design tuned specifically for the F20 and F21 chassis
• Noticeably reduced body roll and improved steering response
• Ready-to-install complete solution with comprehensive documentation

Lowering range and axle load approvals

• Front drop: 25 to 50 mm
• Rear drop: 30 to 55 mm
• Max permitted axle load front: 921 to 1090 kg
• Max permitted axle load rear: up to 1230 kg

Adjustability and on-road feel

Fine-tune the rebound damping in 16 precise clicks to suit your driving style and road conditions. Soften for long motorway runs or firmer for track sessions and fast B-roads. The adjuster is positioned at the top of the piston rod on most applications, making changes quick and straightforward. If you change wheel and tyre sizes, you can easily retune the damping to match.

Built to last

The inox-line stainless construction is designed to resist rust in year-round UK weather. The height adjustment remains operable over time, and all components are engineered for longevity. Each kit is thoroughly tested and meets stringent quality standards.

Warranty

Supplied with a 2-year manufacturer warranty that can extend to 5 years when installed by a recognised specialist dealer, subject to terms.

Vehicle compatibility

• BMW 1 Series M135i and M140i
• Chassis codes: F20 and F21
• Type approvals: 1K2 and 1K4
• Rear-wheel drive vehicles with factory electronic damping

Real-world results

We have fitted and driven this setup ourselves and our customers consistently report a significant boost in confidence, grip, and ride compliance. Expect a planted feel on turn-in, strong mid-corner support, and better traction under power without the crashy ride you get from basic spring-only drops.

Ideal search terms

BMW M135i suspension kit, BMW M140i coilover suspension, F20 lowering suspension, F21 ride height adjustable shocks, BMW 1 Series handling upgrade, performance suspension for M140i, adjustable rebound shocks for BMW 1 Series, fast road coilovers UK, track day suspension BMW F20.

Professional fitting and setup

For expert installation and geometry setup, choose MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.