Product Details
BC Racing ZR Series Coilovers for the 2000-2006 BMW 3 Series Coupe (E46) deliver the deepest damping adjustability in BC Racing's lineup, with Swift Springs included standard and three axes of independent tuning for competitive track programs. Every kit is extensively tested on the 3 Series Coupe E46 chassis and refined until it balances ride quality with performance — the reason 3 Series Coupe coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.
ZR Series kits use an inverted mono-tube damper with a linear twin-piston design, feeding three independent adjustment circuits. Swift Springs come standard — not as an upgrade — and the kit is race-tuned out of the box. 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.
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 Coupe 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 twin-piston design
- Swift Springs come standard
- 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.
- Custom spring rates and custom valving available at checkout
- Fully rebuildable — replacement parts available from BC for the life of the shock
- 2-year manufacturer warranty against defects
Specifications
| Part Number | I-31-ZR |
| Part Name | ZR Series Coilovers |
| Vehicle | 2000-2006 BMW 3 Series Coupe RWD (E46) |
| Drivetrain | RWD |
| Chassis Code | E46 |
| Damping Adjustment | 3-Way (30 levels rebound / 15 LSC / 12 HSC) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | |
| Spring Rate - Rear | |
| Spring Size - Front | |
| Spring Size - Rear | |
| Swift Springs - Front | |
| Swift Springs - Rear | |
| Camber Plates - Front | Included |
| Camber Plates - Rear | Not Applicable |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | True Coilover |
| Notes |
|
Vehicle Fitment
- 2000 BMW 3 Series Coupe RWD (E46)
- 2001 BMW 3 Series Coupe RWD (E46)
- 2002 BMW 3 Series Coupe RWD (E46)
- 2003 BMW 3 Series Coupe RWD (E46)
- 2004 BMW 3 Series Coupe RWD (E46)
- 2005 BMW 3 Series Coupe RWD (E46)
- 2006 BMW 3 Series Coupe RWD (E46)