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Bilstein 21-030253 Suspension Strut Cartridge - Front
| Brand | Bilstein 21-030253 |
|---|---|
| Position | Front |
| Boot Included | No |
| Finish | Black paint |
| Internal Design | Twintube |
| Lower Mount Type | Base cup |
| Series | B4 oe replacement |
| Title | Bilstein shock absorbers |
| Upper Mount Type | Stem |
| Product line | B4 OE Replacement |
| Fits | BMW · 5 vehicles |
OE replacement. Restores original ride quality and handling while meeting OE standards.
Twintube design. Helps deliver consistent damping performance.
Black paint finish. Adds a clean, corrosion-resistant look.
Cross-references KYB 366007, 21-031182 and 31 32 1 092 283 for the same application. See all 13.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bilstein B4 OE Replacement Front Strut Cartridge
The Bilstein B4 OE Replacement suspension strut cartridge is engineered to restore original ride quality and handling while meeting or exceeding OE standards. This front cartridge is a direct-fit option for select BMW 525i and 535i applications, including the 1989 BMW 535i and 1993-1995 BMW 525i.
Key Features
- Bilstein B4 OE Replacement series for factory-style ride restoration
- Suspension strut cartridge for front suspension service
- Twintube internal design for consistent damping response
- Black paint finish
- Upper mount type: stem; lower mount type: base cup
- Boot not included
- Part number 21-030253
Product Details
Bilstein 21-030253 is a front suspension strut cartridge built for drivers who want to return their BMW’s suspension behavior to OE-like performance. The B4 OE Replacement line focuses on maintaining original ride quality and steering feel, making it a practical choice for aging suspension systems on the BMW 525i and BMW 535i. This part cross-references KYB 366007 for the same application.
What It Helps Address
- Excessive front-end bounce or oscillation
- Reduced damping control over bumps and dips
- Uneven or unstable ride feel during braking and cornering
- Worn original strut cartridge performance
- Restoration of factory-style handling response on BMW 525i and BMW 535i models
Installation Notes
Compatible With 1989 BMW 535i, front; 1989 BMW 525i, front; and 1993-1995 BMW 525i, front. Use with a 1.125 inch dust cap. Stem dimensions are 46mm x 14mm. Verify mount style, dust cap size, and suspension configuration before installation. Part number 21-030253 should be matched to the vehicle’s front strut application before service begins.
Quality Assurance
Bilstein B4 OE Replacement dampers are built to meet or exceed OE standards and are backed by Bilstein’s established suspension engineering and manufacturing quality. The 21-030253 strut cartridge is designed for consistent performance in OE-style replacement service.
| Year | Make | Model | Submodel | Body Type | Position | Notes |
|---|---|---|---|---|---|---|
| 1995 | BMW | 525i | Base | Sedan | Front | Use with 1.125 inch dust cap. Stem 46mm X 14mm.; B4 OE Replacement |
| 1994 | BMW | 525i | Base | Sedan | Front | Use with 1.125 inch dust cap. Stem 46mm X 14mm.; B4 OE Replacement |
| 1993 | BMW | 525i | Base | Sedan | Front | Use with 1.125 inch dust cap. Stem 46mm X 14mm.; B4 OE Replacement |
| 1989 | BMW | 525i | Base | — | Front | Use with 1.125 inch dust cap. Stem 46mm X 14mm.; B4 OE Replacement |
| 1989 | BMW | 535i | Base | — | Front | Use with 1.125 inch dust cap. Stem 46mm X 14mm.; B4 OE Replacement |
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