Product Details
BC Racing ZX Series Coilovers for the 2000-2006 BMW 3 Series Convertible (Non-M3) (E46) 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 E46 chassis and refined until it balances ride quality with performance — the reason 3 Series Convertible (Non-M3) 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. The off-the-shelf setup from BC Racing is deliberately balanced — spring rates and valving chosen so the kit feels comfortable day-to-day without giving up performance when you push it. Drivers who want a different recipe can spec Swift Springs, custom spring rates, or fully custom valving at checkout; BC will tune the dampers to match, which is a depth of customization most brands only offer on their top-tier kits.
BC Racing's reputation in the aftermarket suspension world is built on four things: competitive pricing that beats the rest of the fully-adjustable market, customization depth that rivals the top-tier race brands, long-term reliability earned over 20 years of production, and a rebuildable design that keeps the same set of dampers serving you through multiple builds. These 3 Series Convertible (Non-M3) coilovers arrive tuned for the E46 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-90-ZX |
| Part Name | ZX Series Coilovers |
| Vehicle | 2000-2006 BMW 3 Series Convertible (Non-M3) |
| Drivetrain | RWD |
| Chassis Code | E46 |
| Damping Adjustment | 3-Way (30 levels rebound / 15 LSC / 12 HSC) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 6 kg/mm |
| Spring Rate - Rear | 8 kg/mm |
| Spring Size - Front | 62-180-6K |
| Spring Size - Rear | 62-150-8K |
| Swift Springs - Front | 62-178-X |
| Swift Springs - Rear | 62-152-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
- 2000 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2001 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2002 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2003 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2004 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2005 BMW 3 Series Convertible (Non-M3) RWD (E46)
- 2006 BMW 3 Series Convertible (Non-M3) RWD (E46)