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Genuine BMW 33531135420 - Coil Spring Insulator (Lower)
Product Overview
The Genuine BMW Coil Spring Insulator (Part Number 33531135420) is an essential component designed specifically for the suspension systems of various BMW models. Engineered to OEM standards, this premium-grade insulator provides a reliable solution for reducing noise and vibration from the road, enhancing ride comfort for both driver and passengers. This high-quality insulator not only improves the driving experience but also protects the coil spring from damage and corrosion, thereby extending the lifespan of your vehicle's suspension system. With straightforward installation, you can easily replace your old insulator without complex modifications or special tools. Choose Genuine BMW 33531135420 for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Genuine BMW 33531135420 is equivalent to or replaces the following part numbers: 33 53 1 135 420, 33531135420.
Vehicle Compatibility
- BMW 318i 1.8 L4 (1992–1999)
- BMW 318is 1.8 L4 (1992–1999)
- BMW 323i 2.5 L6 (1995–1999)
- BMW 323is 2.5 L6 (1995–1999)
- BMW 325i 2.5 L6 (1994–1995)
- BMW 325is 2.5 L6 (1994–1995)
- BMW 328i 2.8 L6 (1998–1999)
- BMW 328is 2.8 L6 (1998–1999)
- BMW M3 3.0 L6 (1995)
- BMW M3 3.2 L6 (1998–1999)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fit™ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Genuine BMW 33531135420 Coil Spring Insulator do?
The Genuine BMW Coil Spring Insulator plays a crucial role in your vehicle's suspension system by providing support to the coil spring, reducing noise and vibration, and enhancing ride comfort.
How do I know if my Coil Spring Insulator needs replacement?
Common signs that the coil spring insulator may need replacement include excessive noise while driving over bumps, noticeable vibrations in the cabin, or uneven wear on the tires, indicating potential issues with the suspension system.
Can I install the Genuine BMW 33531135420 myself?
This part can be installed as a DIY project. Ensure you follow appropriate safety precautions and consult the vehicle's service manual for guidance on installation.
What are the symptoms of a faulty Coil Spring Insulator?
Symptoms of a failing coil spring insulator may include increased road noise, vibrations felt in the cabin, or a decrease in ride quality. It's essential to address these issues promptly to maintain vehicle safety and performance.
Why should I choose Genuine BMW for my Coil Spring Insulator needs?
Genuine BMW parts, like the 33531135420, offer OE-level quality and fitment, ensuring reliable performance and longevity. Order Genuine BMW 33531135420 today for a factory-correct replacement that restores safety and performance.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandGenuine BMW
- ManufacturerGenuine BMW
- MPN33531135420
- Part TypeCoil Spring Insulator
- PositionLower
- OE Part Numbers33 53 1 135 420, 33531135420
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1992 | BMW | 318i | Base (1.8 L4 GAS) | |
| 1992 | BMW | 325i | Base (2.5 L6 GAS) | |
| 1992 | BMW | 325is | Base (2.5 L6 GAS) | |
| 1992 | BMW | 318is | Base (1.8 L4 GAS) | |
| 1996 | BMW | 318i | Base (1.9 L4 GAS) | |
| 1996 | BMW | 328i | Base (2.8 L6 GAS) | |
| 1996 | BMW | M3 | Base (3.2 L6 GAS) | |
| 1996 | BMW | 318is | Base (1.9 L4 GAS) | |
| 1996 | BMW | 328is | Base (2.8 L6 GAS) | |
| 1997 | BMW | 318is | Base (1.9 L4 GAS) | |
| 1997 | BMW | 318i | Base (1.9 L4 GAS) | |
| 1997 | BMW | 328i | Base (2.8 L6 GAS) | |
| 1997 | BMW | 328is | Base (2.8 L6 GAS) | |
| 1997 | BMW | M3 | Base (3.2 L6 GAS) | |
| 1998 | BMW | 323is | Base (2.5 L6 GAS) | |
| 1998 | BMW | 328is | Base (2.8 L6 GAS) | |
| 1998 | BMW | M3 | Base (3.2 L6 GAS) | |
| 1998 | BMW | 328i | Base (2.8 L6 GAS) | |
| 1998 | BMW | 323i | Base (2.5 L6 GAS) | |
| 1998 | BMW | 318i | Base (1.9 L4 GAS) | |
| 1995 | BMW | M3 | Base (3.0 L6 GAS) | |
| 1995 | BMW | M3 | Lightweight (3.0 L6 GAS) | |
| 1995 | BMW | 318i | Base (1.8 L4 GAS) | |
| 1995 | BMW | 325is | Base (2.5 L6 GAS) | |
| 1995 | BMW | 325i | Base (2.5 L6 GAS) | |
| 1995 | BMW | 318is | Base (1.8 L4 GAS) | |
| 1999 | BMW | 323is | Base (2.5 L6 GAS) | |
| 1999 | BMW | 328is | Base (2.8 L6 GAS) | |
| 1999 | BMW | M3 | Base (3.2 L6 GAS) | |
| 1999 | BMW | 328i | Base (2.8 L6 GAS) | |
| 1999 | BMW | 323i | Base (2.5 L6 GAS) | |
| 1994 | BMW | 325i | Base (2.5 L6 GAS) | |
| 1994 | BMW | 318i | Base (1.8 L4 GAS) | |
| 1994 | BMW | 318is | Base (1.8 L4 GAS) | |
| 1994 | BMW | 325is | Base (2.5 L6 GAS) | |
| 1993 | BMW | 318i | Base (1.8 L4 GAS) | |
| 1993 | BMW | 318is | Base (1.8 L4 GAS) | |
| 1993 | BMW | 325i | Base (2.5 L6 GAS) | |
| 1993 | BMW | 325is | Base (2.5 L6 GAS) |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.




