Product Details
BC Racing ZX Series Coilovers for the 2015-2017 BMW 3 Series Touring 5-Bolt (F31) 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 Touring 5-Bolt F31 chassis and refined until it balances ride quality with performance — the reason 3 Series Touring 5-Bolt 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. BC Racing takes pride in choosing spring rates and damper valving that balance comfort and performance — you never end up with the oversprung, harsh-riding kit some brands ship as their only option. Drivers who want to deviate from the factory setup can order Swift Springs, custom spring rates, and custom valving at checkout; BC will re-valve the dampers to match whatever you specify, a level of customization most brands reserve for their top-tier race kits.
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 Touring 5-Bolt coilovers arrive tuned for the F31 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-115-ZX |
| Part Name | ZX Series Coilovers |
| Vehicle | 2015-2017 BMW 3 Series Touring 5-Bolt RWD/AWD (F31) Wagon |
| Drivetrain | RWD/AWD |
| Chassis Code | F31 |
| Damping Adjustment | 3-Way (30 levels rebound 15 LSC 12 HSC) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 5.5 kg/mm |
| Spring Rate - Rear | 10 kg/mm |
| Spring Size - Front | 62-180-5.5K |
| Spring Size - Rear | 62-220-10K |
| Swift Springs - Front | 62-178-X |
| Swift Springs - Rear | 62-228-X |
| 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
- 2015 BMW 3 Series Touring 5-Bolt RWD/AWD (F31) Wagon
- 2016 BMW 3 Series Touring 5-Bolt RWD/AWD (F31) Wagon
- 2017 BMW 3 Series Touring 5-Bolt RWD/AWD (F31) Wagon