Thermostat Cover 16321-0A040 for Toyota Sienna
163210A040 - Engine parts
Price Details
Dealer Price ≠ Your Price
Official dealer price is only a benchmark. Your LongTop quote is significantly lower.
| Brand | Longtop Supply Quote | Action |
|---|---|---|
| FAW Toyota | $8.36 | Check Better Price |
| Imported Toyota | $19.66 | Check Better Price |
| Lexus | $22.39 | Check Better Price |
Compatible Models
Vehicle models currently mapped to this OE part.
| # | Brand | Model |
|---|---|---|
| 1 | Lexus | Lexus - United States/Canada - LEXUS RX330/350(JPP) - 200302 - 200812 - MCU3#,GSU3 |
| 2 | Lexus | Lexus - United States/Canada - LEXUS RX330/350(NAP) - 200309 - 200901 - MCU3#,GSU3 |
| 3 | Toyota | Toyota - United States/Canada - Senna: SIENNA - 200301 - 200912 - GSL2#,MCL2 |
Product Overview
OE 16321-0A040 is the genuine Lexus OEM thermostat cover that closes the thermostat housing and seals the coolant path. Fits LEXUS RX330/350 (JPP, NAP) and SIENNA, built from 2003 onwards. The listing carries 3 interchangeable numbers, among them 902-5123, 902-5123XD and 90916-A3003.
Ask for a wholesale quotation with your VIN or OE number; we ship worldwide.
Technical Specifications
| OE Number | 163210A040 |
| Part Name | Thermostat Cover |
| Brand | Toyota |
| Position | Upper |
| Type | Thermostat Cover |
| Length | 144mm |
| Width | 118mm |
| Height | 82mm |
| Mounting Hole | 9mm |
OE Cross-Reference
| 902-5123 | Dorman |
| 902-5123XD | Dorman |
| 90916-A3003 | Toyota |
Questions and Answers
Which Toyota or Lexus vehicles is 16321-0A040 used on?
16321-0A040 covers LEXUS RX330/350 (JPP, NAP) and SIENNA, with production years from 2003 onwards. Chassis codes include GSL2#, MCL2#, MCU3#, GSU3#.
Which chassis codes does 16321-0A040 cover?
Chassis codes include GSL2#, MCL2#, MCU3#, GSU3#.
What part numbers replace 16321-0A040?
Listed on this page are 3 interchangeable numbers for 16321-0A040, among them 902-5123 (Dorman), 902-5123XD (Dorman), 90916-A3003 (Toyota).
What are the dimensions of 16321-0A040?
Measuring 144mm long, 118mm wide, and 82mm high, this Lexus Thermostat Cover (part number 16321-0A040) is a genuine unit.
Where is 16321-0A040 installed on the vehicle?
It is fitted in the Upper position.
How many pieces are needed for 16321-0A040?
Sold as one piece per position – check the quantity required for your application.
Is there anything I need to know before installing this part?
A few points before you fit it: Let the system cool fully before opening it, and refill with the specified coolant.
Is the genuine part worth it compared with an aftermarket equivalent?
What the genuine item buys you is concrete: the number is confirmed against the official Toyota catalog, so the application is exactly right for your chassis; and the part is verified against the OE number before dispatch, so you receive exactly what your chassis requires. These are the aftermarket equivalents you may also see quoted.
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