Bilstein B4 Front Shock Absorber / Strut Cartridge Insert 45mm - BMW E30 3 Series 1982-1994 - OEM OE Spec Gas-Pressure Twin-Tube Damper, MacPherson 45 mm Housing - Part 21-030499

Bilstein B4 Front Strut Cartridge 45 mm for BMW E30 3 Series - Part 21-030499

Bring your classic BMW E30 back to its best with this high quality front damper insert from Bilstein. Part number 21-030499 is a stock-spec, gas-charged twin tube strut cartridge designed for 45 mm housings. It delivers factory-style control, sharper turn-in and a smooth, composed ride on British roads without spoiling the authentic character of your car.

We run these on customer cars and our own builds. Feedback is consistently excellent for comfort, grip and stability. If your E30 feels floaty, crashy or vague, this front suspension insert is the proven fix to refresh handling for daily driving, restoration projects and spirited B-road use.

What you get

• Direct-fit front strut insert for 45 mm housings - drop-in solution for a front end refresh
• Gas-charged twin tube construction - consistent damping and dependable control
• Top pin and bottom plate mounting - correct fitment for E30 MacPherson strut assemblies
• OEM-quality ride and response - confidence-inspiring stability and comfort
• Suitable for left or right front - replace in axle pairs for best results

Ideal search terms and use cases

BMW E30 front damper cartridge, E30 45 mm strut insert, front shock insert E30, MacPherson strut cartridge BMW 3 Series, stock height replacement damper, OEM spec front shock E30, classic BMW suspension refresh, daily driver comfort upgrade, restoration-grade front strut BMW E30, Bilstein B4 E30 front cartridge, gas charged shock insert 45 mm, bolt-in front damper BMW 1982 to 1994.

Fitment summary

For BMW 3 Series E30 models with 45 mm front strut housings. Saloon and Touring variants from 1982 to 1994 including 316, 316i, 318i, 320i, 323i, 325i, 325e 2.7, 324d and Touring 316i, 318i, 320i, 325i, 324td. Always measure your existing strut tube to confirm 45 mm before ordering.

Key advantages

• Restore original composure and ride comfort
• Stable damping under load and at speed
• Precise steering feel with improved body control
• Durable everyday performance for UK roads
• Perfect for maintenance, refresh and preservation of classic BMW dynamics

Specifications

Position	:	Front axle
Design	:	Strut insert - MacPherson
Mounting	:	Bottom plate, top pin
Technology	:	Twin tube, gas-charged
Strut housing size	:	45 mm

Vehicle compatibility

Note: Front fitment for 45 mm strut housings only. Measure before purchase. Uses top pin and bottom plate mounting. Replace in pairs for balanced performance.

Compatibility check

We can confirm fit before dispatch. Add your UK registration number or the last 7 digits of your VIN at checkout and we will verify compatibility for your E30.

Professional fitting

For installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Part details

Part number: 21-030499

Alternate reference: BILSTEIN-21-030499

Brand: Bilstein

EAN: 4025258430863

UPC: 651860430867

Search-friendly summary

BMW E30 front strut cartridge 45 mm, Bilstein B4 front damper insert, E30 3 Series front shock insert, gas charged twin tube shock BMW E30, OEM spec replacement strut cartridge, bolt-in front suspension insert, classic BMW 3 Series 1982 to 1994 front damper, left or right front shock cartridge E30.