Is it dangerous to drive with this duct missing?

For normal daily driving, not critical, but for track use, towing, or mountain driving, missing ducting increases the risk of brake fade under sustained heavy braking.

What is the duct made of?

Durable plastic or flexible ducting material.

Do all vehicles have this ducting?

It’s more common on performance vehicles or those factory-equipped for heavy-duty use — standard vehicles may rely on ambient airflow alone.

How do I check whether Brake system air duct BMW 318D E46 2002 SEDAN fits my vehicle?

Compare OEM reference 51718197927 LH, the listed vehicle (BMW 3 E46 2001-2005), connectors, mounting points and the photographs for this exact item.

What is the condition of Brake system air duct BMW 318D E46 2002 SEDAN?

Listed condition: Used. Current availability: 1 in stock - ready to ship. Review the item photographs and any stated defects as well.

How is Brake system air duct BMW 318D E46 2002 SEDAN delivered and returned?

Available delivery methods, timing and price for your country are shown in the cart. Review the applicable 14-day return terms before ordering.

Brake system air duct BMW 318D E46 2002 SEDAN

Name: Brake system air duct BMW 318D E46 2002 SEDAN
Brand: BMW
SKU: 51718197927 LH
Price: 9.00 EUR
Availability: InStock

OEM: 51718197927 LH

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

Details for this exact part

Code: 51718197927 LH
OEM: 51718197927 LH
Condition: Used
Availability: 1 in stock - ready to ship
Make, model: BMW 3 E46 2001-2005
Year: 2002
Engine: Diesel 2.00L 85KW - M47D20
VIN: WBAEU51000CJ09415

What is this part and why does it matter?

This ducting channels cooling air toward the brake disc and calliper, helping dissipate heat generated during braking.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Brake fade or reduced braking performance under sustained heavy use
Cracked or missing duct sections
Brakes running hotter than normal (visible discolouration on the disc)

Installation information

Clips or bolts into place, directing airflow from the front of the vehicle toward the brake assembly — no special tools required.

Frequently asked questions

Brakes generate significant heat under hard or sustained use — excessive heat causes brake fade (reduced stopping power) and accelerates wear on pads and discs, which this duct helps prevent by channelling cooling air to them.

Donor vehicle description

VIN: WBAEU51000CJ09415
Make, model: BMW 318 E46
Year: 2002
Engine: Diesel 2.00L 85KW - M47D20
Transmission: 5-speed manual - S5D
Drive: Rear axle
Equipment: LHD
Colour: SCHWARZ 2 (668)

243 parts from this car

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August 2026
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August 2026
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August 2026
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Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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May 2026
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November 2025
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