Product Details
BC Racing HM Series Coilovers for the 2006-2011 BMW 3 Series Sedan (E90) combine the inverted-damper durability of the RM Series with the independent compression and rebound tuning of the ER Series, BC's pick for track-day McPherson-strut builds. Every kit is extensively tested on the 3 Series Sedan E90 chassis and refined until it balances ride quality with performance, the reason 3 Series Sedan coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.
HM Series kits use an inverted mono-tube damper on McPherson-strut chassis (upright on double-wishbone) with external reservoirs feeding separate compression and rebound adjusters. The result: the tuning depth of the ER Series inside the heavy-load chassis architecture of the RM. 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 Sedan coilovers arrive tuned for the E90 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 (top of damper)
- 30-level compression adjustment (external reservoir)
- Inverted mono-tube damper on McPherson-strut vehicles; upright on double-wishbone
- Combines RM Series inverted-damper architecture with ER Series 2-way adjustability
- 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-03-HM |
| Part Name | HM Series Coilovers |
| Vehicle | 2006-2011 BMW 3 Series Sedan |
| Drivetrain | RWD |
| Chassis Code | E90 |
| Damping Adjustment | 2-Way (30 levels rebound/30 levels compression) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 5.5 kg/mm |
| Spring Rate - Rear | 9 kg/mm |
| Spring Size - Front | 62-170-5.5K |
| Spring Size - Rear | 62-240-9K |
| 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 | Divorced |
| Notes |
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Vehicle Fitment
- 2006 BMW 3 Series Sedan RWD (E90)
- 2007 BMW 3 Series Sedan RWD (E90)
- 2008 BMW 3 Series Sedan RWD (E90)
- 2009 BMW 3 Series Sedan RWD (E90)
- 2010 BMW 3 Series Sedan RWD (E90)
- 2011 BMW 3 Series Sedan RWD (E90)