Description
BMW E39 5 Series Sedan (95-04) BC Racing RM coilover kit 5/4.5 kg/mm
The BC Racing RM coilover kit E39 (part number I-06-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 5 Series E39 Sedan with rear-wheel drive, model years 1995 to 2004. The spring rate is 5 kg/mm front and 4.5 kg/mm rear.
The RM series from BC Racing is made for cars that mainly run on track days, in hill climbs or in tarmac rallies, and is also available for the E39 Sedan. On MacPherson struts the RM uses an inverted monotube, on other suspension types an upright monotube.
The digressive piston and the fully synthetic oil with a very high viscosity index keep the damping constant as the dampers warm up. For the E39 Sedan, the RM has the same spring rate as the BR and DS.
Key benefits
- Inverted monotube: on the MacPherson struts, typical of the RM series.
- Fully synthetic oil: very high viscosity index, for damping that stays stable when hot.
- Digressive piston: firm control of slow body movements.
- 30 clicks: compression and rebound adjusted together.
- Spring rate 5/4.5 kg/mm: for the E39 Sedan.
- Pillowball top mounts or camber plates at the front: with rubber or the original mounting at the rear.
- Made for heavy use: track days, hill climbs and tarmac rally.
- Rebuildable: the dampers can be rebuilt.
Suitable for
BMW 5 Series E39 Sedan with rear-wheel drive, model years 1995 to 2004 (not the Touring)
- Track days and regular circuit work
- Hill climbs and tarmac rally
- An E39 that is mainly used as a sports car
Technical specifications
- Manufacturer: BC Racing
- Part number: I-06-RM-MA
- Series: RM, inverted, for track days, hill climbs and tarmac rally
- Spring rate front/rear: 5/4.5 kg/mm
- Damper design: inverted monotube on MacPherson struts, upright monotube on other suspension types, digressive piston, fully synthetic oil with very high viscosity index
- Damping: 30 clicks, compression and rebound simultaneously
- Ride height: infinitely adjustable via the damper body
- Top mounts: pillowball top mounts or camber plates at the front, rubber or original mounting at the rear
- Contents: dampers and springs front and rear, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
- Warranty: 1 year on manufacturing defects; noise from track use is not covered by the warranty
Fitting and delivery
The RM kit is vehicle-specific and replaces the original dampers and springs of the E39 Sedan. We recommend having it fitted by an experienced mechanic. On some cars the pillowball top mount at the front requires a small modification to the upper mounting; if in doubt, contact us. BC Racing advises periodic greasing of the RM and ZR series and recommends them less for road use than the BR, DS, ER or ZX. After adjusting height and camber, have the wheel alignment set again. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily has the kit out of stock, you can still order and we will keep you informed.
The BC Racing RM for the BMW E39 Sedan is made for track days, hill climbs and tarmac rally and uses fully synthetic oil with a very high viscosity index.
Why choose this RM coilover kit E39?
If you mainly use your E39 on the circuit, in a hill climb or on a tarmac rally stage, the RM is the series developed for exactly that. The damping stays stable over long sessions and can be adjusted in 30 steps. If you mainly drive the car on the road, the BR or DS is a better match.
BC Racing coilover kits for the BMW E39 Sedan
Overview of the BC Racing series for the BMW E39 Sedan supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.
| Series | Part number | Springs f/r | Damping | Intended for |
|---|---|---|---|---|
| BR | I-06-BR-RA | 5/4.5 | 30 clicks, linear, pillowball top mounts front | Road with the occasional track day |
| DS | I-06-DS-DA | 5/4.5 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM (this kit) | I-06-RM-MA | 5/4.5 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
For the BMW E39 Touring, BC Racing has separate kits. Their part numbers start with I-42.
Frequently asked questions
What is the difference between the BC Racing RM and DS for the E39 Sedan?
The RM coilover kit E39 is aimed at track days, hill climbs and tarmac rally and has inverted dampers on the MacPherson struts and fully synthetic oil; the DS is a track-focused monotube that can also be used sportily on the road. Both have 5/4.5 kg/mm, a digressive piston and 30 clicks.
Can I use the BC Racing RM for the E39 daily on the road?
BC Racing does not recommend that. The RM series needs periodic greasing and for road use BC Racing advises the BR, DS, ER or ZX instead.
Does the BC Racing RM for the E39 Sedan also fit an E39 Touring?
No. BC Racing UK lists this kit for the E39 Sedan. For the Touring without self-levelling suspension (SLS), BC Racing supplies the BR and DS kits with part numbers starting with I-42.
What is the delivery time of the BC Racing RM coilover kit for the E39?
1 to 2 weeks, as long as the manufacturer has stock. If the kit is temporarily unavailable, you can still order and we will let you know when it arrives.
Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.
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