The 28600-P7W-003 pressure switch is listed as a 4th clutch transmission pressure switch for specific Honda and Acura applications. A matching vehicle name or a transmission-related symptom is not enough to identify this part. Before ordering, compare the complete OE number, the exact switch position, the vehicle and transmission application, and the physical details visible on the original switch.
This guide explains how to evaluate the NexuParts 28600-P7W-003 4th clutch pressure switch using the verified information in the product listing. It does not replace vehicle-specific diagnosis or service information.
What the 28600-P7W-003 Pressure Switch Listing Identifies
The listing identifies one transmission pressure switch with OE/OEM reference 28600-P7W-003. Its stated position or reference is the 4th clutch, and the NexuParts SKU is also 28600-P7W-003. The package contains one switch.
Those details matter because multiple pressure switches can appear similar in a transmission system. The product data specifically warns against assuming that a similar-looking 3rd clutch switch is interchangeable with the 4th clutch switch. Treat the complete OE number and switch position as separate checks: both should agree with the original part or a reliable vehicle-specific catalog.
Verified Honda and Acura Application References
The current product data lists the following catalog references:
- Honda Odyssey: 2002–2004
- Honda Pilot: 2003–2004
- Acura TL: 2000–2003
- Acura MDX: 2001–2002
- Acura CL: 2001–2003
These references are useful for narrowing the search, but they are not a universal fitment promise. Applications can vary by transmission, trim, production date, and market. Confirm the exact transmission and the 4th clutch switch position through a reliable catalog for the specific vehicle. If the catalog returns a different OE number, stop and resolve that difference before ordering.
Why a Symptom or Diagnostic Code Is Not Enough
A transmission symptom or diagnostic code can support a diagnostic process, but it does not identify one exact replacement part. The same general concern can involve wiring, connectors, fluid-related conditions, another switch position, or a different component. Replacing a part based only on a symptom can result in an incorrect order without resolving the vehicle concern.
Use diagnosis to determine which circuit or component requires attention. Then use the OE number, switch position, connector, threaded base, and product photos to confirm the replacement identity. Keeping diagnosis and part identification as two separate steps is one of the best ways to reduce avoidable fitment errors.
28600-P7W-003 Pressure Switch Comparison Checklist
1. Match the complete OE/OEM reference
Compare 28600-P7W-003 character by character. Do not rely on a shortened number, a similar suffix, or a marketplace title that omits part of the reference. Use the marking on the original part when it is readable, or confirm the number through reliable vehicle-specific parts information.
2. Confirm the 4th clutch position
Verify that the required part is identified as the 4th clutch pressure switch. A pressure switch intended for another position should not be treated as equivalent merely because its connector or threaded body looks close in a small image.
3. Check the vehicle and transmission
Confirm the exact model, model year, transmission, production information, and market when those details are used by the catalog. A listed Honda Odyssey, Honda Pilot, Acura TL, Acura MDX, or Acura CL still needs this vehicle-specific check.
4. Compare the connector
Study clear photos of the original switch and compare them with every available product image. Check the connector housing, the keying that controls how the plug fits, and the visible terminal layout. A connector that appears generally similar can still differ in a way that prevents correct connection.
5. Compare the threaded base and housing
Review the threaded base, hex size, housing shape, visible markings, and overall proportions. The listing’s images are the visual reference for the supplied switch. If a meaningful physical detail differs from the original, request fitment help before ordering or installation.
What Is Included in the Package?
The listing states that the package includes one transmission pressure switch. Do not assume the order includes multiple switches, wiring, connectors, tools, or other transmission components unless they are expressly shown and stated on the product page. Confirm the quantity before checkout if the repair plan involves more than one component.
Common Buying Mistakes to Avoid
- Ordering by vehicle make and year without confirming the transmission and OE number.
- Confusing a 3rd clutch switch with the specified 4th clutch pressure switch.
- Matching only part of 28600-P7W-003 instead of the complete reference.
- Ignoring differences in connector keying, terminal layout, thread, hex, or housing shape.
- Assuming a diagnostic code automatically proves that this exact switch is required.
- Assuming the package contains more than the single switch stated in the listing.
If you are comparing other parts in the same repair category, browse the NexuParts Transmission & Drivetrain collection. For a different type of clutch-system component, the 1J1721465BD clutch hydraulic hose listing illustrates why OE numbers and physical configuration must be checked independently for every component.
Installation Planning Before the Part Arrives
Use service information written for the exact vehicle to confirm the switch location, diagnostic process, removal procedure, tightening specification, and sealing requirements. These details are vehicle- and transmission-specific, so a universal installation sequence would not be reliable. Transmission-related service should be performed by a qualified technician when appropriate.
Before installation, retain the original switch for side-by-side comparison. Confirm the new part’s identity before altering or installing it. If the OE number, connector, threaded base, housing, or switch position does not match, pause and request help rather than forcing the connection or thread.
Frequently Asked Questions
Is 28600-P7W-003 a 3rd or 4th clutch switch?
The verified product data identifies 28600-P7W-003 as a 4th clutch transmission pressure switch. Do not assume a similar 3rd clutch switch is interchangeable.
Does it fit every vehicle in the listed year ranges?
No universal fitment is established by year and model alone. Confirm the exact transmission, production details, market, 4th clutch position, complete OE number, connector, and physical switch.
How many switches are included?
The package is listed as one transmission pressure switch.
What information should I send for fitment help?
Send the product link, VIN, original OE/OEM number, vehicle year and model, transmission details, and clear photos of the original switch and connector. These details make a comparison more useful than a symptom description alone.
Final Check Before Ordering
For the best chance of selecting the correct 28600-P7W-003 pressure switch, verify the complete OE number and 4th clutch position first. Then confirm the exact vehicle and transmission, compare the connector and threaded body, review every product image, and remember that the listing supplies one switch. When all of those details agree, review the 28600-P7W-003 product page and complete the final comparison before ordering.
