How to remove and install the exhaust manifold in 3.5L V6 engine for the 2004 Toyota Sienna?

This procedure assumes that the engine has been lowered from the vehicle; attempting it with the engine in place requires additional steps that vary by model. The following procedure applies to either exhaust manifold. Begin by disconnecting the electrical connectors from the left upstream oxygen sensor. Next, remove the bolts securing the exhaust manifold support bracket and take it off. Disconnect any interfering wire clamps and remove the heat shield from the front exhaust manifold. Evenly loosen the six nuts securing each exhaust manifold and then remove the exhaust manifold. Discard the old exhaust manifold gasket. For installation, reverse the removal process, ensuring to use a new gasket with the oval-shaped protruding tip facing the correct direction: the tip must face to the rear for the left manifold and to the front for the right manifold. Finally, tighten the exhaust manifold nuts gradually, starting from the center nuts and working outward.

Genuine 2004 Toyota Sienna Exhaust Manifold

Engine Exhaust Manifold

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3 Exhaust Manifolds found

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2004 Toyota Sienna Exhaust Manifold Converter Sub-Assembly, No.2
Part Number: 25052-20190
$646.69 MSRP: $809.56
You Save: $162.87 (21%)
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Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold, No.2; Exhaust Manifold, Manifold
- Manufacturer Note: *115=TOYOTA/03-/Y
- Part Name Code: 25052
- Item Weight: 15.50 Pounds
- Item Dimensions: 28.6 x 18.6 x 7.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25052-20190
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
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Fits the following 2004 Toyota Sienna Submodels:
- CE, LE, XLE | 6 Cyl 3.3L, 6 Cyl 3.5L | 2GRFE, 3MZFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK, MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK, MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
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2004 Toyota Sienna Right Exhaust Manifold Sub-Assembly
Part Number: 17140-20030
$517.78 MSRP: $762.16
You Save: $244.38 (33%)
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Product Specifications
- Other Name: Manifold Sub-Assy, Exhaust, Rh; Exhaust Manifold
- Position: Passenger Side
- Part Name Code: 17104
- Item Weight: 10.00 Pounds
- Item Dimensions: 33.3 x 6.5 x 21.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 17140-20030
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2004 Toyota Sienna Submodels:
- CE, LE, XLE | 6 Cyl 3.3L, 6 Cyl 3.5L | 2GRFE, 3MZFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK, MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK, MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
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2004 Toyota Sienna Exhaust Manifold Converter Sub-Assembly
Part Number: 25051-20040
$676.97 MSRP: $847.47
You Save: $170.50 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Sub-Assy, Exhaust Manifold; Exhaust Manifold, Manifold
- Manufacturer Note: *115=TOYOTA/03-/Y
- Part Name Code: 25051
- Item Weight: 10.70 Pounds
- Item Dimensions: 16.9 x 15.6 x 9.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25051-20040
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2004 Toyota Sienna Submodels:
- CE, LE, XLE | 6 Cyl 3.3L, 6 Cyl 3.5L | 2GRFE, 3MZFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK, MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK, MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK

2004 Toyota Sienna Exhaust Manifold

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2004 Toyota Sienna Exhaust Manifold Parts Questions & Experts Answers

Q: How to remove and install the exhaust manifold in 3.5L V6 engine for the 2004 Toyota Sienna?
A: This procedure assumes that the engine has been lowered from the vehicle; attempting it with the engine in place requires additional steps that vary by model. The following procedure applies to either exhaust manifold. Begin by disconnecting the electrical connectors from the left upstream oxygen sensor. Next, remove the bolts securing the exhaust manifold support bracket and take it off. Disconnect any interfering wire clamps and remove the heat shield from the front exhaust manifold. Evenly loosen the six nuts securing each exhaust manifold and then remove the exhaust manifold. Discard the old exhaust manifold gasket. For installation, reverse the removal process, ensuring to use a new gasket with the oval-shaped protruding tip facing the correct direction: the tip must face to the rear for the left manifold and to the front for the right manifold. Finally, tighten the exhaust manifold nuts gradually, starting from the center nuts and working outward.