Product Details
BC Racing ZX Series Coilovers for the 2012-2018 BMW 3-Series F30 True Rear Coilover bring the same three-axis adjustability as the race-spec ZR Series with valving tuned for drivers who split time between street and track. Every kit is extensively tested on the 3-Series F30 True Rear Coilover chassis and refined until it balances ride quality with performance — the reason 3-Series F30 True Rear Coilover coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.
ZX Series kits share the three-axis damper architecture of the race-spec ZR Series, tuned out of the box for drivers who want race-grade adjustability without the ride harshness on the commute home. Where BC Racing separates itself is tuning philosophy: every off-the-shelf spring rate and damper setup is chosen to stay comfortable on daily roads while still delivering real performance at the track. If you want something different, Swift Springs, custom rates, and custom valving are all options at checkout — BC will match the valving of the dampers to whatever springs you pick, something most brands don't offer outside their flagship race lineup.
Since 2004, BC Racing has grown into one of the most trusted names in aftermarket coilovers — not by racing to the bottom on price, but by pairing that price with real build quality, deep customization options, and a damper design any suspension shop can rebuild instead of replacing. These 3-Series F30 True Rear Coilover coilovers arrive tuned for the 3-Series F30 True Rear Coilover chassis and ready to bolt in — no break-in period, no guessing at setup. Every kit ships with a 2-year manufacturer warranty, lifetime access to BC service parts (pistons, seals, shafts — no unit replacement required when it's time for a rebuild), and in-house tech support from both BC Racing and the Springrates team.
Features
- 30-level rebound adjustment
- 15-level low-speed compression adjustment
- 12-level high-speed compression adjustment
- Inverted mono-tube damper with linear twin-piston design
- Ride height adjustable independent of spring preload
- Upper mount hardware varies by chassis — camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.
- Swift Spring and custom spring rate upgrades available at checkout
- Custom damper valving paired with custom spring rates on request
- Fully rebuildable — replacement parts available from BC for the life of the shock
- 2-year manufacturer warranty against defects
Specifications
| Part Number | I-136-ZX |
| Part Name | ZX Series Coilovers |
| Vehicle | 2012-2018 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts) |
| Drivetrain | RWD |
| Damping Adjustment | 3-Way (30 levels rebound 15 LSC 12 HSC) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | |
| Spring Rate - Rear | |
| Camber Plates - Front | Included |
| Camber Plates - Rear | Not Applicable |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | True Coilover |
| Notes | The ZX Series is not available in Extreme-Low configuration. |
Vehicle Fitment
- 2012 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2013 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2014 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2015 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2016 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2017 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)
- 2018 BMW 3 Series F30 True Rear Coilover RWD (3-Bolt Upper Mounts)