# Bilstein 21-030505 B4 Series Twintube Strut Insert for 1984-1993 Bmw 318I and More

### Performance Overview

Bilstein B4 Shocks and Struts are ideal as OEM replacements, and are made to guarantee factory quality performance. They feature a large-diameter body, and rely on track-proven and road ready suspension technologies. The shocks are available in a classic black finish, and are backed by a limited lifetime warranty.

### Key Features

-   B4 Series OE Replacement Suspension Strut Cartridge

### Vehicle Fitment

-   1991 Bmw 318I (Note: Base)
-   1992 Bmw 318I (Note: Base; Convertible)
-   1991 Bmw 318Is (Note: Base)
-   1984 Bmw 325E (Note: Base)
-   1985 Bmw 325E (Note: Base)
-   1986 Bmw 325E (Note: Base)
-   1987 Bmw 325E (Note: Base)
-   1986 Bmw 325Es (Note: Base)

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is 21-030505.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   B4 Series Twintube Strut Insert for Bmw 318I
-   21-030505 fitment
-   Bilstein B4 Series Twintube Strut Insert
-   1991 Bmw 318I B4 Series Twintube Strut Insert

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

1991

Bmw

318I

Base

1992

Bmw

318I

Base; Convertible

1991

Bmw

318Is

Base

1984

Bmw

325E

Base

1985

Bmw

325E

Base

1986

Bmw

325E

Base

1987

Bmw

325E

Base

1986

Bmw

325Es

Base

1987

Bmw

325Es

Base

1987

Bmw

325I

Base

1988

Bmw

325I

Base

1989

Bmw

325I

Base

1990

Bmw

325I

Base

1991

Bmw

325I

Base

1992

Bmw

325I

Base; Convertible

1993

Bmw

325I

Base

1987

Bmw

325Is

Base

1988

Bmw

325Is

Base

1989

Bmw

325Is

Base

1990

Bmw

325Is

Base

1991

Bmw

325Is

Base

## Details

- **Price:** 159.94 CAD
- **Vendor:** Bilstein
- **Type:** B4 Series Twintube Strut Insert
- **Tags:** 1984 Bmw 325E, 1985 Bmw 325E, 1986 Bmw 325E, 1986 Bmw 325Es, 1987 Bmw 325E, 1987 Bmw 325Es, 1987 Bmw 325I, 1987 Bmw 325Is, 1988 Bmw 325I, 1988 Bmw 325Is, 1989 Bmw 325I, 1989 Bmw 325Is, 1990 Bmw 325I, 1990 Bmw 325Is, 1991 Bmw 318I, 1991 Bmw 318Is, 1991 Bmw 325I, 1991 Bmw 325Is, 1992 Bmw 318I, 1992 Bmw 325I, 1993 Bmw 325I, 21-030505, Automotive Parts, B4 Series Twintube Strut Insert, Bilstein, Bilstein Suspension, Direct Replacement, Performance Suspension

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 159.94 CAD | In stock |

## Images

- Bilstein 21-030505 B4 Series Twintube Strut Insert for 1984-1993 Bmw 318I and More

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/bilstein-bmw-318i-suspension-strut-21-030505)
> Updated: 2026-07-16