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Secondary Air Injection Pump
This photo shows the same type of part you'll receive. Since each used part has its own wear and scratches, yours may look slightly different. Check the product notes for details about the condition of this specific part.

OEM Air Injection Pump for 2003-2006 BMW

Only 1 left in stock
$199.95

ℹ️ Product Notes

This is a used part. It is the air injection pump assembly, but it does not come with the mounting bracket.

Fits 2.5L and 3.0L engines. Check your old part for a matching plug. Does not include the rubber mounting bracket.
Condition: Excellent (A)
Like new, minimal to no wear
76,844 miles
Odometer reading when part was removed
See All Other Secondary Air Injection Pumps
SKU #
1707421-70185-143

Why Buy Used OEM Parts?

✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested to ensure it meets our quality standards. While it may show some cosmetic wear from previous use, it's fully functional and ready to install.

✓ Original Equipment: This is a genuine OEM (Original Equipment Manufacturer) part - the exact same part that came with your vehicle from the factory. It's designed specifically for your make and model, ensuring perfect fitment and performance.

✓ Works Like New: Despite some visual wear, this part will perform just as well as a brand new one. The internal components and functionality are intact, giving you the same reliability you'd expect from OEM quality.

✓ Significant Savings: Save 50-80% compared to buying new! Used OEM parts offer exceptional value - you get factory quality at a fraction of the cost. It's the smart choice for budget-conscious vehicle owners who won't compromise on quality.

✓ Risk-Free Purchase: We stand behind our used parts with a generous 6-month warranty, 30-day returns, and 100% money-back guarantee. If it doesn't work out for any reason, simply return it for a full refund. You have nothing to lose!

🛡️ 30-Day Returns + 6-Month Warranty - Buy with Confidence!

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Vehicle Fitment Guide

This part fits the following vehicles:

BMW
320i 2004 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
2004
325Ci 2003-2006 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Convertible 2003 - 2006 L6 2.5L RWD | Automatic & Manual
Base Coupe 2003 - 2006 L6 2.5L RWD | Automatic & Manual
2004 - 2005
325i 2003-2006 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2003 - 2006 L6 2.5L RWD | Automatic & Manual
Base Wagon 2003 - 2005 L6 2.5L RWD | Automatic & Manual
Base Sedan 2006 L6 3.0L RWD | Automatic & Manual
2004
325xi 2003-2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2003 - 2005 L6 2.5L AWD | Automatic & Manual
Base Wagon 2003 - 2005 L6 2.5L AWD | Automatic & Manual
2004
330Ci 2003-2006 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Convertible 2003 - 2006 L6 3.0L RWD | Automatic & Manual
Base Coupe 2003 - 2006 L6 3.0L RWD | Automatic & Manual
M Convertible 2005 L6 3.0L RWD | Automatic & Manual
M Coupe 2005 L6 3.0L RWD | Automatic & Manual
2004
330i 2003-2006 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2003 - 2006 L6 3.0L RWD | Automatic & Manual
M Sedan 2005 L6 3.0L RWD | Automatic & Manual
2004
330xi 2003-2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2003 - 2005 L6 3.0L AWD | Automatic & Manual
2004
525i 2004-2005 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2004 - 2005 L6 2.5L RWD | Automatic & Manual
530i 2004-2005 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Sedan 2004 - 2005 L6 3.0L RWD | Automatic & Manual
X3 2004-2006 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
2.5i SUV 2004 - 2006 L6 2.5L AWD | Automatic & Manual
3.0i SUV 2004 - 2006 L6 3.0L AWD | Automatic & Manual
2005
X5 2003-2006 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
3.0i SUV 2003 - 2006 L6 3.0L AWD | Automatic & Manual | Fits 3.0L engine only
Z4 2003-2005 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
2.5i Convertible 2003 - 2005 L6 2.5L RWD | Automatic & Manual
3.0i Convertible 2003 - 2005 L6 3.0L RWD | Automatic & Manual
2004

⚠️ Important: Please verify your vehicle's year, make, model, and specifications before ordering. If you're unsure about fitment, contact our customer service team for assistance.

Policies

Shipping & Handling

  • Standard shipping: 3-7 business days via UPS Ground
  • Parts are carefully packaged to prevent damage during transit

Returns (30 Days)

We accept returns within 30 days of delivery for this part.

  • Defective parts: We will replace the part or issue a refund at our discretion
  • Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
  • Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
  • Return shipping: We cover return shipping as part of our 100% money-back guarantee
  • Parts must be returned in original packaging and unmodified condition
  • Poorly packaged returns that arrive damaged will not be credited

6-Month Warranty

All used parts include a 6-month warranty from the date of purchase.

  • If your part fails within 6 months, we will send a replacement
  • Refunds are only issued if we cannot provide a suitable replacement
  • Warranty covers defects — not installation errors, misuse, or damage after installation

Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.

Damaged in Shipping?

If your part arrives damaged:

  • Stop immediately — do not install the part
  • Keep all original packaging and boxes
  • Take clear photos of the damage and packaging
  • Contact us within 48 hours of delivery

We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.

Order Cancellation

Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.

Symptoms & Diagnosis

Warning signs the Air Injection Pump is failing:

  • Check Engine Light is on
  • Rough idling or stalling, especially when the engine is cold
  • Failed emissions test
  • Whining or buzzing noise coming from the pump area
  • Fuel smell

How to test if this part is the problem:

  1. Visually inspect the pump for damage or cracks.
  2. Check the electrical connector for corrosion or loose wires.
  3. Use a multimeter to test the pump's electrical circuit for power and ground.
  4. Listen for the pump to activate during a cold start. If it doesn't run, it may be faulty.
  5. Have a professional mechanic perform a smoke test to check for leaks in the air injection system.

Common failure causes for this part:

  • Moisture entering the pump, causing corrosion
  • Electrical problems, such as shorts or open circuits
  • Normal wear and tear over time
  • Blockage in the air injection system

Buyer's Checklist

What to look for when buying this part:

  • Ensure the part is specifically designed for your vehicle's year, make, and model.
  • Check for any visible damage, such as cracks or broken connectors.
  • Confirm the part is from a reputable source.

Quality indicators for the available options:

FeatureUsed OEMRefurbished OEMNew Aftermarket
OriginOriginal Equipment Manufacturer (OEM)Original Equipment Manufacturer (OEM)Third-party manufacturer
ConditionUsed, tested, and inspectedRestored with new componentsNew
PriceGenerally the lowest priceMid-range priceCan vary, often mid-range
ReliabilityCan be very reliable if properly testedTypically very reliable after restorationReliability can vary by manufacturer
WarrantyVaries by sellerOften includes a warrantyOften includes a warranty

What's typically included with the part:

  • The air injection pump itself
  • Sometimes includes mounting hardware (check with the seller)

Installation Overview

Difficulty level and estimated time:

  • Difficulty: Moderate
  • Estimated time: 1-2 hours

Special tools needed (if any):

  • Socket set
  • Screwdrivers
  • Pliers
  • Multimeter (optional, for testing)

Critical steps and tips:

  1. Disconnect the negative battery cable before starting.
  2. Locate the air injection pump. It's usually near the engine.
  3. Disconnect the electrical connector and any hoses attached to the pump.
  4. Remove the mounting bolts and carefully remove the old pump.
  5. Install the new pump in the reverse order.
  6. Reconnect the battery cable.

Whether DIY is recommended or professional installation is better:

  • DIY is possible for mechanically inclined individuals.
  • Professional installation is recommended if you're not comfortable working on your car.

Buying Options

Compare: Used OEM, Refurbished OEM, New Aftermarket

| Option | Description | Pros Used OEM: Best value - genuine factory parts, tested and inspected, at significantly lower prices

  • Refurbished OEM: Factory parts professionally restored with new components
  • New Aftermarket: Brand new third-party parts built to OE specs

Typical Lifespan

  • The air injection pump typically lasts 5-7 years or 75,000-100,000 miles.
  • Factors that affect longevity include environmental conditions, driving habits, and maintenance.

Price Ranges

  • Used OEM: $50 - $150
  • Refurbished OEM: $100 - $250
  • New Aftermarket: $150 - $350
  • Labor cost for installation: $75 - $200
  • Total job cost: $125 - $550

Vehicle-Specific Notes

  • Some models have issues with moisture getting into the air injection pump, leading to premature failure.
  • Check for any Technical Service Bulletins (TSBs) related to the air injection system on your specific vehicle.

Verification After Install

  • Start the engine and listen for the air injection pump to activate during the cold start cycle.
  • Use a scan tool to check for any diagnostic trouble codes (DTCs) related to the air injection system.
  • Visually inspect all connections and hoses to ensure they are properly installed.

FAQ

Q: Will this part fit my specific BMW model?
A: This part is designed for 2003-2006 BMW 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, X3, and Z4 models. Please verify fitment using the vehicle selector on our website.

Q: What does the air injection pump do?
A: The air injection pump helps reduce emissions by pumping air into the exhaust system during a cold start. This helps burn off excess hydrocarbons.

Q: How do I know if my air injection pump is bad?
A: Common symptoms include a check engine light, rough idling, failed emissions test, and a whining noise from the pump.

Q: Is it difficult to replace the air injection pump myself?
A: The difficulty level is moderate. If you are comfortable working on cars and have the necessary tools, you can likely do it yourself. Otherwise, professional installation is recommended.

Q: What kind of warranty do you offer on used OEM parts?
A: Warranty coverage varies by seller. Please check the specific product listing for warranty details.

Part Specifications

OEM Part Numbers:

  • BMW: 11727508270, 11727513890
  • Pierburg: 722738080

Fits Years: 2003 2004 2005 2006

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