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If your Acura TSX heater or air conditioning fan is acting erratically, a failing blower motor resistor is a common cause. Choosing the right replacement matters because the wrong part can lead to inconsistent fan speeds, early failure, or fitment problems that complicate installation. This guide covers a short list of top picks for the Acura TSX that meet strict fitment and durability standards. We evaluated options for electrical reliability and installation compatibility to help you find a part that restores steady HVAC performance. Read on for the selected choices and the criteria we used to narrow the field.
Looking for other parts? See all Acura TSX parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Dorman 973-452 Blower Motor Resistor Kit with Harness |  |
| Best Quality Built to a higher standard if you want something more solid | AISIN HVAC Blower Motor Resistor Kit (BMRH-00271) — Compatible with Honda Accord 2005–2007 and Acura TSX 2006–2008 |  |
| Best Value The sweet spot between price and what you get | FAERSI HVAC Blower Motor Resistor (Replacement for Honda/Acura Fitments) |  |
| Best budget The cheapest option that still gets the job done reliably | POHILA Blower Motor Resistor Replacement for Acura TSX |  |
| Highest Rated A top-rated pick with lots of positive feedback | Yikesai Blower Motor Resistor Compatible with Acura TSX |  |
| Most popular A crowd favorite that many people choose with confidence | TRQ Blower Motor Resistor Module (HCA40057) |  |
| Best Seller A high-volume bestseller chosen again and again | A-NAFTULY HVAC Front Blower Motor Resistor Control Module (replaces 79330-SDA-A01) |  |
1. Dorman 973-452 Blower Motor Resistor Kit with Harness
| Manufacturer | Dorman Products |
|---|---|
| Model | 973-452 |
| Included components | Resistor and harness pigtail |
| Material type | Resistor |
| Part interchange info | 79330-S5A-942,79330SDAA01 |
This Dorman blower motor resistor kit replaces a failed or corroded resistor assembly and includes the harness pigtail commonly needed for a complete repair. For Acura TSX models in the listed years it restores the multiple blower speeds that disappear when the resistor overheats or the connector fails. The kit is a direct-fit style replacement intended to match factory functionality and is simple to install for a DIYer or technician because it uses the vehicle’s original mounting points and plug locations. Practical benefits include getting variable fan speeds back without replacing the entire blower motor and a harness pigtail when the original connector is damaged. Some users report long, trouble-free service while others experienced shorter lifespans, so longevity may vary with installation conditions and electrical exposure. The kit does not include any foam gasket present on some factory parts and long-term durability can depend on addressing underlying heat or corrosion issues in the HVAC housing.
Best for: A balanced all-round buyer who wants a practical, cost-effective repair to restore HVAC fan speeds on an Acura TSX without replacing the blower motor and prefers a straightforward, DIY-friendly replacement.
Less Ideal for: Owners seeking an extended-lifespan or premium OEM re-manufactured component or those unwilling to address underlying moisture or heat issues in the HVAC housing should consider other options.
- Complete kit with both resistor and harness pigtail for most repairs
- Direct replacement designed to restore factory fan-speed control
- Simple installation that uses existing mounting points and plugs
- Made by an established aftermarket supplier with vehicle-specific part interchange info
- Some users report inconsistent longevity compared with factory parts
- Does not include the foam gasket found on some original resistors
Verdict: A complete, direct-fit resistor and harness kit that restores blower fan-speed control on compatible Acura TSX models.
2. AISIN HVAC Blower Motor Resistor Kit (BMRH-00271) — Compatible with Honda Accord 2005–2007 and Acura TSX 2006–2008
| Manufacturer | AISIN |
|---|---|
| Manufacturer Part Number | BMRH-00271 |
| OEM Part Number | 79330SDRA01 |
| Voltage | 12 Volts |
This Aisin blower motor resistor kit is a direct replacement designed to restore precise blower fan speed control on compatible Acura TSX and Honda Accord models. It installs in place of the factory resistor and includes a wiring harness and installation manual for a straightforward swap. The unit has four blade terminals and a two-bolt mounting pattern that match the referenced part, and Aisin positions it as a factory-quality aftermarket component built to manufacturer tolerances. In practical use this means consistent fan speeds, improved HVAC responsiveness, and reduced risk of intermittent blower operation that commonly appears when resistors fail. The harness and correct terminal layout simplify fitment and reduce wiring fuss during installation. Limitations are minimal but include the usual requirement to confirm exact vehicle year and connector style before ordering and the need for basic hand tools to complete the replacement; it replaces the resistor only and not the blower motor itself.
Best for: Performance-oriented owners who prioritize dependable HVAC response and want a high-quality, direct-fit replacement to restore precise fan control on a well-maintained vehicle.
Less Ideal for: Buyers looking to repair intermittent HVAC issues caused by the blower motor, fan assembly, or unrelated electrical faults should consider diagnosing those components instead of only replacing the resistor.
- Factory-quality design aimed to match original fit and function
- Includes wiring harness and installation manual for easier installation
- Four blade terminals and two-bolt mounting match the referenced OEM part
- Designed to restore consistent fan speeds and HVAC responsiveness
- Only replaces the resistor module and will not fix failures in the blower motor itself
- Requires verification of year-specific connector style before purchase
Verdict: Aisin's resistor kit delivers factory-quality fan speed control and includes the harness needed for a straightforward, direct-fit HVAC repair on the specified Acura TSX and Honda Accord years.
3. FAERSI HVAC Blower Motor Resistor (Replacement for Honda/Acura Fitments)
| Manufacturer | FAERSI |
|---|---|
| Item model number | 5824077022 |
| Manufacturer Part Number | FAERSI-10017 |
| Safety Rating | ISO/TS 16949 Qualified |
| Replaces Part Numbers | 79330-SDG-W41, 79330SDAA01, RU438 |
This FAERSI blower motor resistor replaces factory units and restores the blower fan’s speed control when the original resistor fails. It is a direct-fit replacement for a range of Honda and Acura models including Acura TSX, and installs by removing a few screws on the lower passenger side under the dash. The part uses a four-pin electrical connector and comes with a foam gasket in some listings to help seal the opening. Buyers report it resolves common symptoms such as the fan only working on one speed or not blowing at all. Because it is an aftermarket replacement, fit and fin count can differ slightly from the factory part so a careful test after installation is recommended. Several users praised easy DIY installation with basic hand tools, while a minority reported early failures, so expect typical aftermarket variability in long-term durability.
Best for: Practical DIY owners who want an affordable, ready-to-install replacement that gets the heater and A/C blower working again without paying dealer prices.
Less Ideal for: Drivers seeking a guaranteed long-term factory-equivalent part or those who prefer professional replacement services should consider an OEM-sourced resistor or dealer-installed option.
- Direct-replace design for compatible Honda and Acura blower systems
- Four-pin connector and standard mounting points for straightforward installation
- Includes foam gasket in some units to improve fit and sealing
- Meets or claims to meet factory specifications and ISO/TS 16949 qualification
- Aftermarket reliability appears variable with occasional reports of premature failure
- Visual differences from the factory part (fin count/height) may require slight trimming or adjustment in tight spaces
Verdict: A cost-effective, direct-fit blower motor resistor that restores blower speed control on compatible Acura TSX and Honda models.
4. POHILA Blower Motor Resistor Replacement for Acura TSX
| Manufacturer | POHILA |
|---|---|
| Compatible OEM numbers | References include 79330SDGW51, 79330SDAA01 and others |
| Fitment note | Lists compatibility with Acura TSX (see product for specific years) |
This POHILA blower motor resistor is a direct-fit replacement intended to restore the Acura TSX's HVAC fan speed control when a failed resistor causes the blower to run on limited speeds or not at all. It installs in place of the factory resistor inside the blower housing using the existing mounting points and wiring harness, so a basic hand-tool swap is usually all that is required. The part claims reinforced materials for heat and impact resistance and lists multiple compatible OEM reference numbers, which helps confirm fitment for TSX years covered by the part's compatibility. In practical terms you should expect to regain full speed range on the cabin fan and avoid the expense of replacing the entire blower motor. Limitations are typical for budget aftermarket resistors: long-term durability may vary versus higher-end factory-quality parts, and installation requires accessing the blower housing which can be inconvenient on some model years. Check vehicle fitment carefully before ordering to ensure compatibility with your TSX year and HVAC variant.
Best for: Budget-conscious Acura TSX owners seeking an inexpensive repair to restore HVAC fan speed without replacing the whole blower assembly.
Less Ideal for: Owners who prioritize OEM-level longevity or who prefer parts backed by extended manufacturer warranties should consider higher-end factory-quality replacements.
- Direct-fit replacement that uses existing blower mounting and connector for straightforward installation on compatible TSX models.
- Lists multiple OEM reference numbers to help verify correct fitment for Acura TSX applications.
- Claims heat and impact resistant construction intended to handle typical HVAC operating conditions.
- Restores full blower fan speed control so you can avoid replacing the entire blower motor in most failure cases.
- Durability and long-term reliability may be lower than higher-cost factory-quality resistors.
- Compatibility depends on TSX model year and HVAC variant so incorrect selection will require a return or exchange.
Verdict: A low-cost, direct-fit fix to restore blower speed control on Acura TSX models, suitable for budget repairs but with typical aftermarket longevity trade-offs.
5. Yikesai Blower Motor Resistor Compatible with Acura TSX
| Fitment | Compatible with Acura TSX (2004–2014 listed models in product fitment) |
|---|---|
| Replaces part numbers | 79330-SDA-A01, 79330-SNA-A01, 79330-S5A-942 and equivalents |
| Item model number | BMR-HD-001 |
This blower motor resistor is a direct-fit replacement intended to restore full multi-speed operation to the Acura TSX's HVAC blower motor when fan speeds are lost or the system only runs on high. It installs behind the glove box and plugs into the factory wiring harness, so a DIY owner with basic tools can typically swap it in without major disassembly. The unit includes a heatsink-style resistor assembly and is described as built from corrosion-resistant materials for better heat dissipation and durability. Practical benefits are straightforward: it returns precise blower speed control, prevents the fan from being stuck on one speed, and avoids a trip to the dealer. The main limitations are that long-term durability is uncertain compared with factory components and some installations can be fiddly in tight under-dash spaces, which may require patience or a right-angle driver to reach fasteners. Expect a simple, cost-effective fix if you are comfortable with basic under-dash work on an Acura TSX.
Best for: Reliability-focused buyers who prioritize restoring dependable HVAC function on their Acura TSX and prefer an affordable, do-it-yourself repair to avoid dealership downtime.
Less Ideal for: Drivers who want an OEM-sourced part with a long factory-backed service history or those uncomfortable working in confined under-dash areas should consider dealer or professional replacements instead.
- Fits Acura TSX wiring and mounting for a plug-and-play replacement
- Restores full multi-speed blower control to resolve common HVAC fan failures
- Heatsink design and corrosion-resistant materials for improved thermal stability
- Simple DIY installation that avoids dealership labor for many owners
- Long-term durability may vary compared with factory-quality parts
- Tight under-dash access can make removal and reinstallation time-consuming
Verdict: A practical, budget-friendly plug-and-play resistor that reliably restores blower speed control on Acura TSX models for owners comfortable with basic under-dash repairs.
6. TRQ Blower Motor Resistor Module (HCA40057)
| Manufacturer | TRQ |
|---|---|
| Model | TRQ HCA40057 Blower Motor Module |
| Item model number | HCA40057 |
| Reference numbers | RU398; 79330SDAA01; 79330SDRA0 |
This TRQ blower motor resistor module is a pre-assembled replacement intended to restore blower fan speed control when the original resistor fails. It is sold as a direct-fit module for certain Acura TSX and Honda Accord sedan model years and comes with TRQ fitment references to help confirm compatibility before installation. In practice the module installs like a factory-replacement part and eliminates the need to modify the housing or wiring, which makes it a convenient option for DIY repairs. Buyers get TRQ support resources and videos that simplify the process for less-experienced installers. Reported benefits include consistent fan speed operation after installation and plug-and-play fit. Limitations include occasional delivery or availability issues noted by some buyers and the need to confirm vehicle-year fitment precisely since compatibility varies by model and year. This unit is meant as a direct replacement resistor module rather than an upgraded performance part.
Best for: Convenience-driven buyers who prioritize a quick, straightforward repair and prefer a ready-to-install replacement with manufacturer installation support.
Less Ideal for: Shoppers seeking an upgraded high-performance blower control or those who prefer professional-shop-only solutions should consider alternatives.
- Direct-fit design for compatible Acura TSX and select Honda sedans for straightforward replacement
- Pre-assembled module reduces installation time and eliminates trimming or rewiring
- Manufacturer provides DIY videos and fitment references to simplify installation
- Some buyers reported delivery or fulfillment problems unrelated to part function
- Compatibility is year- and model-specific so incorrect fit is possible without verification
Verdict: A practical, plug-and-play blower resistor module for convenience-minded owners needing a fast factory-style replacement for compatible Acura TSX and Honda sedans.
7. A-NAFTULY HVAC Front Blower Motor Resistor Control Module (replaces 79330-SDA-A01)
| Manufacturer | A-NAFTULY |
|---|---|
| Model | 79330SDAA01, 79330-SDG-W41,79330SDRA01 |
| Manufacturer Part Number | AN70233 |
| Compatible vehicle (excerpt) | Acura TSX (see fitment list) |
This A-NAFTULY blower motor resistor is a replacement control module that restores variable fan speeds when a failed resistor leaves the HVAC blower stuck or nonfunctional. It is intended as a direct-fit replacement for the factory part number listed for the Acura TSX and installs from the passenger-side lower dash or firewall area by removing a few screws and swapping the assembly. The unit's design matches the original connector and mounting points so you can expect a straightforward, no-tools-needed swap beyond basic hand tools. In real-world use it returns full fan control for heating, ventilation, and defrost and many buyers report quick fixes in minutes. Build quality varies across units, so some purchasers see long-lasting, factory-like performance while a few report early failures; if you prefer minimal downtime, test the new resistor before reassembling trim. This is a practical, low-cost repair option when the blower stops working or is stuck on one speed, but it is not a guaranteed long-term fix in every case.
Best for: Risk-averse mainstream buyers who prioritize getting their Acura TSX back to reliable, factory-style HVAC operation without complex diagnostics or expensive shop repairs.
Less Ideal for: Drivers seeking a lifetime upgrade solution or heavy-duty motorsport use should consider higher-end or dealer-specified alternatives; this is intended as a cost-effective repair part.
- Direct replacement for factory blower resistor part numbers used on the Acura TSX, simplifying fitment checks
- Simple installation that can be completed with basic hand tools from the passenger side access panel
- Affordable repair that restores fan speed control and HVAC functionality quickly
- Matches original connector and mounting points to avoid wiring modifications
- Reported variability in durability with some units failing shortly after installation
- No vehicle-specific harness or additional hardware included beyond the resistor assembly
Verdict: A budget-friendly, direct-fit blower resistor that gets Acura TSX HVAC fan control working again quickly, though longevity can vary.
Choosing the Right Acura TSX Blower Motor Resistor: Key Factors to Consider
Fitment and Connector Compatibility
Correct physical fit and an exact connector match are essential because the blower motor resistor sits in a confined HVAC housing and must mate directly with the vehicle harness. A wrong connector or slightly different mounting tab can prevent installation or require wiring changes that increase failure risk.
Inspecting fitment documentation avoids surprises during installation. Parts designed for the Acura TSX will align with factory mounting points and wire terminals, reducing installation time and the chance of loose connections that cause intermittent fan speeds.
Electrical Durability and Resistor Design
The resistor element must tolerate repeated heating and cooling cycles without degrading, since HVAC systems change fan speeds frequently. Durable resistor designs use corrosion-resistant materials and stable resistance values to maintain consistent fan speed steps over time.
Look for parts that specify materials or construction that limit oxidation and resist thermal fatigue. A stable resistance profile helps prevent a single speed dominating or future failures that leave the fan stuck at one setting.
Heat Management and Venting
Because the resistor dissipates heat when regulating current to the blower motor, adequate venting and heat-shedding design extend service life. Poor heat management leads to accelerated wear or thermal runaway that can burn out the element.
Consider how the part interfaces with the vehicle's HVAC airflow and whether it uses heat sinks, spaced resistor coils, or protective housings to disperse heat. Proper thermal design reduces the chance of repeated overheating during heavy HVAC use, especially in hot climates or during extended defrost cycles.
Resistance Profile and Fan Speed Steps
A blower motor resistor should provide the correct set of resistance values to produce the intended fan speed steps for the vehicle. If the resistance profile is off, you may get incorrect or uneven speeds that affect cabin comfort and defogging performance.
Choose a part that matches the original resistance stages for the Acura TSX so each blower setting translates to predictable airflow. Consistent step behavior also helps you diagnose other HVAC issues by isolating the resistor as the source when speeds are stable.
Connector Protection and Corrosion Resistance
Exposure to moisture and dust in the HVAC housing can corrode terminals and lead to poor electrical contact. Parts with protected connectors, corrosion-resistant plating, or sealed terminals offer longer reliable service.
Good connector protection reduces intermittent operation and prevents voltage drop that can strain the blower motor. Assessing how the part addresses environmental exposure helps avoid early failures from rusted pins or degraded insulation.
Warranty and Manufacturer Support
A clear warranty indicates confidence in the part's expected lifespan and provides recourse if the resistor fails prematurely. Reasonable warranty terms also reflect manufacturing quality and quality control standards.
Look for parts with straightforward warranty claims processes and adequate coverage duration. This gives you recourse if the resistor exhibits early failure and can be a useful tiebreaker when two otherwise similar units meet fitment and performance needs.
How We Chose the Best Acura TSX Blower Motor Resistor
We focused on parts that specifically fit the Acura TSX platform and prioritized electrical durability, connector and mounting compatibility, heat management design, and warranty coverage. Electrical durability was assessed by looking for designs that reduce hotspoting and resist coil burnout under typical HVAC loads. Connector and mounting compatibility ensured straightforward installation without modification to the vehicle wiring or housing. Heat management design considered materials and airflow around the resistor to limit thermal degradation in continuous use. We also examined resistance profile stability to ensure consistent fan speed steps across expected operating temperatures and seasons. Warranty terms were reviewed as a proxy for manufacturer confidence and expected lifespan. Exclusions included generic, non-vehicle-specific modules and parts lacking clear fitment documentation for the Acura TSX, as well as units with reported connector or mounting mismatches. The final list reflects parts that balance reliable operation, correct fit, and practical installation for Acura TSX owners.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common symptoms of a failing blower motor resistor in an Acura TSX?
Common signs include loss of certain fan speeds, the fan running only on high, or intermittent fan operation. You may also notice inconsistent airflow from the vents or fan speeds that change without input. These symptoms often point to the resistor before checking the blower motor itself.
Can I test the HVAC blower resistor myself?
Yes, basic tests are possible with a multimeter to measure resistance across terminals or to check for continuity. You can also observe voltage at the connector while cycling fan speeds. These tests often indicate whether the resistor is open or has incorrect resistance values, though access to the HVAC housing is required.
Where is the blower motor resistor located on an Acura TSX?
The resistor is typically mounted in the HVAC housing near the blower motor, often behind the glove box or under the dash on the passenger side. Access can require removing trim panels or the glove box to reach the resistor and its connector.
Is replacing the blower motor resistor difficult?
Replacement difficulty ranges from easy to moderate depending on access. For many Acura TSX model years, it is accessible with basic hand tools once trim panels or the glove box are removed. The job usually involves unplugging the connector, removing a small number of fasteners, and swapping the part.
Will a bad blower resistor damage the blower motor?
A failing resistor typically causes improper fan speeds rather than direct motor damage, but severe electrical faults or poor connections can create additional strain. Addressing resistor problems promptly reduces the chance of causing excessive current draw or heat that could affect the blower motor.
How do I troubleshoot intermittent HVAC fan problems?
Start by checking resistor connections and for signs of corrosion or heat damage at the resistor and harness. Use a multimeter to verify resistance values and voltage at the connector while cycling fan speeds. If connections and resistor readings are within expected ranges, further diagnosis of the blower motor and control circuitry may be needed.
Conclusion
When replacing the blower motor resistor in an Acura TSX, prioritize correct fitment and connector compatibility to avoid installation issues. Electrical durability, heat management, and a matching resistance profile are the next most important factors to ensure predictable fan speeds and long service life. Balance those technical criteria with connector protection and warranty support. Focusing on these elements will help you restore reliable HVAC operation and avoid repeat trips to diagnose intermittent fan behavior.
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