Shop

Description

BMW E90/E92 3 Series True Rear Sedan/Coupe RWD (05-11) BC Racing ZX coilover kit 5.5/6 kg/mm

The BC Racing ZX coilover kit E90 E92 True Rear (part number I-118-ZX) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 3 Series E90 Sedan and E92 Coupe with rear-wheel drive, excluding the M3, model years 2005 to 2011, in True Rear version. The spring rate is 5.5 kg/mm front and 6 kg/mm rear.

The ZX True Rear is the 3-way adjustable BC Racing kit for a BMW E90 or E92 that does long track sessions or serious drifting. With the True Rear kit the spring sits around the damper at the rear, so you have a complete strut at the rear; with the standard I-03 kit the spring and damper remain separate at the rear, as from the factory.

The ZX combines the damper base of the DS with the external reservoir of the ER: an upright monotube with double piston, 20 clicks of compression at low speed, 12 clicks at high speed and 30 clicks of rebound. The springs are 5.5 kg/mm front and 6 kg/mm rear.

Key benefits

• True Rear: a complete strut at the rear as well, with the spring around the damper.
• 3-way adjustable: compression at low and high speed and rebound adjustable separately.
• External reservoir: on an upright monotube with double piston.
• Racing oil with a very high viscosity index: damping that stays consistent in long sessions.
• Digressive piston: firm damping at slow body movements.
• Replaceable upper mounting: camber plates on suitable kits, rubber top mounts optional.
• Spring rate 5.5/6 kg/mm: the same as the BR, DS and ER True Rear.
• Rebuildable: the dampers can be rebuilt.

Suitable for

BMW 3 Series E90 Sedan and E92 Coupe with rear-wheel drive, model years 2005 to 2011, in True Rear version; not for the M3 and not for the xDrive (xi) with four-wheel drive. For the E91 Touring and E93 Convertible, BC Racing has separate kits (I-17).

• Competitive track work and long sessions
• Demanding drifting
• E90 and E92 cars with a True Rear setup and 3-way damping

Technical specifications

• Manufacturer: BC Racing
• Part number: I-118-ZX
• Series: ZX, for competitive track work, long sessions and drifting
• Version: True Rear (integrated rear), a complete strut at the rear with the spring around the damper
• Spring rate front/rear: 5.5/6 kg/mm
• Damper design: upright monotube with double piston and external reservoir, digressive, racing oil with a very high viscosity index
• Damping: 3-way, 20 clicks compression low speed, 12 clicks compression high speed, 30 clicks rebound
• Ride height: continuously adjustable via the damper body
• Top mounts: replaceable upper mounting, camber plates on suitable kits, rubber top mounts optional
• Contents: 4 struts with dampers and springs, 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 ZX True Rear is vehicle-specific and replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic. Please note: BC Racing specifies that with a True Rear kit the body shell must be reinforced before fitting. After setting ride height and camber, have the wheel alignment reset. 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 of the delivery date.

The BC Racing I-118-ZX is a 3-way adjustable True Rear coilover kit for the BMW E90 and E92 with external reservoir and springs of 5.5 kg/mm front and 6 kg/mm rear.

Why choose this ZX coilover kit E90 E92 True Rear?

For an E90 or E92 that does long sessions on the circuit or the drift track, the ZX offers the most adjustment range among the True Rear kits: compression at low and high speed and rebound, each separately. With True Rear the spring also sits around the damper at the rear. When fitting, allow for the body shell reinforcement that BC Racing specifies.

BC Racing coilover kits for the BMW E90 Sedan and E92 Coupe True Rear

Overview of the BC Racing series for the BMW E90 Sedan and E92 Coupe True Rear supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the standard version without True Rear, BC Racing has separate kits for the E90 Sedan and E92 Coupe. Their part numbers start with I-03.

Frequently asked questions

What is the difference between the BC Racing ZX True Rear and the ER True Rear for the BMW E90 and E92?

The ZX is 3-way adjustable, the ER 2-way. The ZX has separate compression for low and high speed (20 and 12 clicks) plus 30 clicks of rebound; the ER has compression and rebound each in 30 clicks. Springs (5.5/6 kg/mm), external reservoir and True Rear setup are common to both.

What does True Rear mean on the BC Racing ZX coilover kit for the E90 and E92?

It means that the spring also sits around the damper at the rear, so you have a complete strut at the rear. With the standard ZX kits for this car (I-03-ZX) the spring and damper remain separate at the rear, as from the factory, and the spring rate is 10/12 or 5.5/8 kg/mm; the ZX coilover kit E90 E92 True Rear has 5.5/6 kg/mm. For True Rear, BC Racing specifies a reinforced body shell.

Does the BC Racing ZX True Rear coilover kit for the E90 and E92 also fit an M3, xDrive or E93 Convertible?

No. BC Racing releases this kit for the E90 Sedan and E92 Coupe with rear-wheel drive; the M3 and the xDrive (xi) are excluded. For the E91 Touring and E93 Convertible, BC Racing has separate kits with I-17 numbers.

What is the delivery time of the BC Racing ZX True Rear coilover kit for the BMW E90 and E92?

The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the kit is briefly out of stock, you can still order it and we will let you know when it comes in.

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.