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Match Front Pedal Feel With A Rear Line Upgrade
A firmer front brake line only tells half the story if the rear hoses are still stock rubber. The Wilwood 221-17413 rear flexline kit replaces the factory rubber hose on both the 330Ci and M3, giving your E46 a consistent, confidence inspiring pedal at all four corners.
Key Features
- Direct bolt in replacement for the factory rear rubber brake hose
- Braided stainless steel construction resists expansion under hard braking
- DOT compliant for street legal use
- Improves brake pedal feel and response compared to aging rubber lines
- Corrosion resistant PTFE inner liner for long service life
- Wilwood MPN 221-17413 rear position kit
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2001-2006 | BMW | 330Ci |
| 2001-2006 | BMW | M3 |
Specifications
| Detail | Value |
|---|---|
| Brand | Wilwood |
| MPN | 221-17413 |
| UPC | N/A |
| Position | Rear |
| Construction | Braided Stainless Steel, PTFE Liner |
| Compliance | DOT Approved |
What's Included
- Rear brake flexlines (pair)
- Mounting hardware
About Wilwood
Wilwood Engineering has designed and manufactured high performance brake systems for street, off road, and racing applications for decades. Their stainless steel flexlines are built to the same standard as their brake kits, giving daily drivers and racers alike a firmer, more consistent pedal.
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FAQ
What is the Wilwood 221-17413?The Wilwood 221-17413 is a braided stainless steel rear brake flexline kit designed to replace the factory rubber brake hose on 2001-2006 BMW 330Ci and M3 models.
Will this flexline fit my E46?This kit fits 2001-2006 BMW 330Ci and M3 model years at the rear position. Check your vehicle's model year against the fitment table above to confirm.
Is this brake line DOT legal for street use?Yes, the Wilwood 221-17413 is DOT compliant and legal for street use.
Do I need to replace the front lines too?Not required, but replacing both front and rear flexlines together delivers the most consistent pedal feel improvement across the full brake system.
Do I need to bleed the brakes after installing this flexline?Yes, the brake system must be bled after installation to remove any air introduced during the swap.
Does this kit include the front flexlines as well?No, this listing is for the rear position only. A separate front flexline kit is available if replacing all four corners.
What material is the outer covering on this brake line?The line uses a braided stainless steel outer covering over a PTFE inner liner for durability and resistance to abrasion.
Is this the same flexline for both the 330Ci and M3?Yes, the rear brake line routing is shared between the 330Ci and M3 for this generation, so the same kit fits both models.
Install Instructions
- Raise and safely support the vehicle, then remove the rear wheels.
- Disconnect the factory rubber brake hoses at the hardline and caliper connections.
- Remove the factory hoses and any retaining hardware.
- Install the new Wilwood stainless steel flexlines, connecting them to the hardlines and calipers.
- Torque all fittings to manufacturer specification and secure with any retaining hardware.
- Bleed the brake system to remove air introduced during installation.
- Check for leaks and verify proper pedal feel before returning the vehicle to service.
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