2002 Porsche Boxster AC Fan Replacement Parts: A Complete Guide

If the air conditioning in your 2002 Porsche Boxster has stopped blowing or is making strange noises, the AC fan (blower motor) or its associated components may need replacement. Unlike older vehicles, the Boxster uses a dedicated blower unit mounted behind the dashboard that can fail over time. This guide covers the common symptoms, the specific parts you need, and how to choose the right replacement for your Boxster.

Common Symptoms of a Failing AC Fan

Before ordering parts, confirm that the blower motor is the issue. Common signs include:

• No air flow from vents on any speed setting
• Air flow only on high speed (indicates a failed blower resistor or control module)
• Whistling, grinding, or rattling noises when the fan runs
• Intermittent operation (motor may be failing)
• Burning smell from vents (motor overheating)

If you have partial speed issues, the blower resistor or final stage unit is often the culprit. If the fan does not run at all, the motor itself is likely bad.

2002 Porsche Boxster AC Fan Parts Breakdown

The main components are:

• Blower motor – the fan unit that pushes air
• Blower resistor / final stage – controls fan speed; located near the motor
• Blower motor wheel / cage – the plastic fan that can crack or become unbalanced
• Connector / wiring harness – often melts due to high current

For 2002 Boxster models (both 2.7L and 3.2L S), the blower motor assembly is similar. The part numbers are:

• OEM Blower Motor: Porsche part number 986-572-115-00 (or 98657211500)
• OEM Final Stage Resistor: 996-572-119-00 (or 99657211900)
• Aftermarket equivalents: Behr Hella, Valeo, Uro Parts, or Four Seasons

OEM vs. Aftermarket Parts

OEM – Genuine Porsche parts from the dealer or reputable online retailers (non-marketplace). They are made by Bosch or other tier-1 suppliers. Higher cost, but guaranteed fit and longevity.

Aftermarket – Brands like Behr Hella, Four Seasons, or Uro Parts offer compatible parts at lower prices. Quality varies. For the blower motor, a known OEM supplier is Behr Hella. The final stage resistor from Hella or OEM is recommended because cheap aftermarket versions can fail quickly due to heat.

Recommendation: If you want reliability, choose OEM for the resistor module. The blower motor can be aftermarket from a reputable brand.

Step-by-Step Replacement Guide

Replacing the AC fan is a moderate DIY job. It requires removing the passenger footwell panel and some trim. Here is an overview:

Tools Needed

• T20 Torx screwdriver
• Trim removal tools (plastic pry tools)
• 8mm socket and ratchet (for some bolts)
• Flashlight
• Replacement parts (motor and resistor if needed)

Procedure for Passenger Side Blower (most common)

1. Disconnect the negative battery terminal to avoid short circuits.
2. Remove the passenger footwell kick panel (pry off plastic retainers).
3. Remove the lower dashboard cover (if equipped) by unscrewing two T20 screws.
4. Locate the blower motor assembly behind the glove box area (toward the center tunnel).
5. Disconnect the electrical connector from the motor. Note: the connector may be hot/melted; use caution.
6. Remove the final stage resistor (usually attached to the blower housing with two screws).
7. Unbolt the blower motor mounting bracket (three 8mm bolts).
8. Lower the motor and fan wheel out. The fan wheel often stays attached or can be separated; you may need to pry it off carefully.
9. Install the new motor (and wheel if separate). Ensure the fan spins freely.
10. Reinstall the resistor module. Apply dielectric grease to the connector pins to prevent future melting.
11. Reattach housing and brackets, reconnect battery, test all fan speeds.

Note: The 2002 Boxster may also have a driver side blower (less common failure). Its removal is similar but behind the driver footwell.

Buying Parts: What to Look For

When shopping for parts, avoid generic listings from unknown sellers. Instead:

• Search for the specific OEM part numbers above.
• Use trusted auto parts retailers like Pelican Parts, ECS Tuning, FCP Euro, or Suncoast Porsche (all authorized non-marketplace sites).
• Verify the part fits your 2002 model year (some early 986s may differ).
• Check if the blower motor includes the fan wheel (some aftermarket units come as a complete assembly).
• The resistor module is sometimes sold as a "final stage unit" for the Boxster.

Additional Tips

• Blower motor noise after replacement: If you hear a whistle, the fan wheel may be hitting the housing. Adjust its position or use a foam seal.
• Melted connectors: It is common for the power connector to melt due to resistance. Consider upgrading to a plug and play connector kit (sold by Porsche parts suppliers).
• Check the cabin air filter: A dirty filter can restrict airflow and strain the fan. Replace it annually.
• AC system performance: If the fan works but air isn't cold, the issue may be refrigerant charge or a blend door, not the blower.

Final Recommendation

For most 2002 Porsche Boxster owners, replacing the AC fan is a straightforward fix that restores comfort. Buy a Behr Hella or OEM blower motor (part 986-572-115-00) and an OEM final stage resistor (996-572-119-00). Use a trusted online retailer like Pelican Parts or FCP Euro. Replace both components at once to avoid future failure. Budget around $150–$300 for quality parts. If you are not comfortable with dashboard work, a qualified independent Porsche shop can perform the job in 1-2 hours. Keep in mind that ignoring a noisy or failed blower can lead to further electrical damage, so address it promptly.