Replace the HVAC blower motor on a 2012 Tesla Roadster. Because the Roadster shares its chassis and much of its HVAC architecture with the Lotus Elise/Exige, the blower motor is located under the passenger-side dash/footwell area and is accessed similarly to a Lotus Elise.

Warnings

Tools required

Parts

• HVAC blower motor assembly (Roadster/Lotus Elise-pattern) × 1 — Manufacturer-specified Roadster blower motor — verify against your VIN before ordering
• Cabin air filter (recommended replacement while dash is open) × 1 — Roadster-spec cabin filter

Preparation

1. TESLA SAFETY PREAMBLE: Park on level ground, place transmission in neutral with parking brake firmly engaged (early Roadsters use a manual transmission and do not have 'P').
2. Exit all doors with the key fob moved well away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even though this is a non-HV job.
3. Disconnect the 12V low-voltage auxiliary battery. On the Roadster, the 12V auxiliary battery is in the front compartment area — refer to the Roadster Owner's Manual for exact location on your VIN. Loosen the negative terminal first.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If you encounter an orange cable, an HV component, or are unsure whether a system is de-energized: STOP and consult a Tesla-certified technician.
6. Allow the HVAC system to cool fully if the vehicle has been recently driven.
7. Identify the blower motor location on the passenger side under the dash/footwell (Lotus Elise-pattern installation). Clear the passenger footwell of mats and personal items.
8. Confirm replacement blower motor matches by physical comparison before removing the original.

Procedure

1. 1

   Verify 12V is disconnected
   Confirm with a multimeter or by attempting to power the HVAC fan that the 12V system is fully de-energized. The blower motor circuit must be dead before disconnecting its harness to avoid arcing or controller damage.
2. 2

   Access the passenger footwell
   Move the passenger seat fully rearward. Remove the passenger footwell trim panel and any kick panel covering the HVAC blower housing. Fasteners are typically small Phillips screws and plastic clips — use a trim tool to release clips without cracking the panel.
   ⚠Roadster interior trim is fragile and aged composites become brittle. Work slowly with a plastic trim tool.
3. 3

   Locate the blower motor housing
   With the footwell trim removed, locate the blower motor housing on the passenger side of the HVAC case. The motor sits in a circular housing with the squirrel-cage fan, retained by screws or a twist-lock collar (configuration follows the Lotus Elise HVAC layout). Note the orientation and any ducting before disturbing.
4. 4

   Disconnect blower motor electrical connector
   Unclip and disconnect the electrical connector at the blower motor. Inspect the connector pins for heat discoloration or melting — a failed blower often indicates upstream resistor/controller damage. Set the harness aside, supported, so it does not hang on the connector.
   ℹ️If the connector shows signs of heat damage, also inspect/replace the blower motor resistor before reassembly.
5. 5

   Inspect and (if accessible) remove the blower resistor
   If the blower motor resistor/regulator is accessible adjacent to the motor and is being serviced, remove its retaining screws and disconnect its harness. This is optional but recommended whenever replacing the motor itself.
   Torque spec

   Blower Motor Resistor Screws2 Nm (1.5 lb-ft)
6. 6

   Remove blower motor retaining screws
   Remove the screws (or release the twist-lock retainer, depending on configuration) securing the blower motor to the HVAC housing. Support the motor as the last fastener is removed — it will drop free once unsupported.
   Torque spec

   Blower Motor Screws4 Nm (3 lb-ft)
7. 7

   Extract the blower motor
   Carefully maneuver the blower motor out of the housing. The squirrel-cage fan is wider than it appears — rotate the assembly as needed to clear the housing opening without striking the evaporator fins or surrounding ductwork.
   ⚠Do not force the motor past the evaporator core. Bent fins reduce HVAC performance and can leak refrigerant if pierced.
8. 8

   Inspect the blower housing
   With the motor out, inspect the housing interior for debris (leaves, rodent nesting material, shed cabin filter media). Vacuum out any debris. Confirm the evaporator drain is clear by feeling for moisture/airflow at the drain outlet under the car.
9. 9

   Install the new blower motor
   Position the new blower motor into the housing in the same orientation as removed. Ensure the fan cage spins freely and does not contact the housing wall. Reinstall the retaining screws and torque them to specification.
   Torque spec

   Blower Motor Screws4 Nm (3 lb-ft)
10. 10

    Reconnect the electrical connector
    Reconnect the blower motor harness, ensuring the connector latches fully. Route the harness so it cannot contact the rotating fan cage.
11. 11

    Reinstall blower resistor (if removed)
    If the resistor was removed, reinstall it now and torque the retaining screws to specification. Reconnect its harness.
    Torque spec

    Blower Motor Resistor Screws2 Nm (1.5 lb-ft)

Reassembly

1. Reinstall the passenger footwell trim panel and kick panel, ensuring all clips seat fully and no wiring is pinched.
2. Replace the cabin air filter at this time if it has been more than 2 years since the last replacement.
3. Reconnect the 12V auxiliary battery — positive terminal first, then negative. Torque battery terminal bolts to specification.
4. Verify all tools and fasteners are accounted for and removed from the footwell before closing up.

Verification

• With the 12V reconnected and the vehicle powered on, cycle the HVAC fan through ALL speed settings (low through high). Confirm smooth, proportional speed change with no buzzing, ticking, or squealing.
• Switch between fresh air and recirculation modes — listen for the recirc door actuator and confirm airflow volume changes are appropriate.
• Check airflow at all vent positions (defrost, face, floor) — confirm output volume is consistent with pre-repair expectations and that no rattle or fan-cage interference exists.
• Verify no HVAC-related warnings appear on the Roadster's VDS/instrument display.
• Note the service date and mileage. Cabin air filter is on a 2-year interval per Tesla guidance — log replacement date if you replaced it during this job.
• Recheck the footwell trim after a short test drive to confirm no rattles from clips or fasteners that did not fully seat.

More procedures for this vehicle