2026 Toyota Sienna Engine Parts

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

This group shows a single part: QUALCAST 1030532.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

9 Oil parts for the 2026 Toyota Sienna come from 4 brands — IDEMITSU, VALVOLINE, LIQUI MOLY and 1 other brand. The "Popular" part is LIQUI MOLY 20328.

The Full Synthetic section lists 8 options from VALVOLINE, LIQUI MOLY, IDEMITSU and 1 other brand — full-synthetic oils. LIQUI MOLY 20328 is listed in this group.

In the High Mileage (>75,000 Miles) grade, IDEMITSU supplies 1 part: oils grouped for high-mileage engines. A representative part number is IDEMITSU 30015121750.

Part numbers include LIQUI MOLY 20328, MOBIL 124321 and IDEMITSU 30016050750, among others listed above.

This table covers the caps on the oil filler neck. Read more

This group shows a single part: MOTORAD MO155.

This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive. Read more

9 Oil Filter parts for the 2026 Toyota Sienna come from 7 brands — BOSCH, WIX, FVP and 4 other brands. The "Popular" part is MOBIL M1103A.

The Economy section lists 3 options from BOSCH, FVP and PRO-TEC — the catalog's value-priced group. BOSCH 72229WS is listed in this group.

The High Performance / Heavy Duty section lists 2 options from MOBIL and WIX — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. MOBIL M1103A is listed in this group.

In the Standard Replacement grade, WIX, BECK/ARNLEY, BOSCH and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is WIX 51394.

Listed part numbers: MOBIL M1103A, BOSCH 72229WS and FVP R1394, plus the other parts above.

This table covers the chains that drive the oil pump. Read more

One part is listed for the 2026 Toyota Sienna — MELLING 1084.

This table covers the Oil Pump Chain tensioners. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

This group shows a single part: MELLING BT7064.

This table covers the Oil Pump sprockets. Read more

One part is listed for the 2026 Toyota Sienna — MELLING S1325.

This table covers the timing chains that keep the cams in time with the crank. Read more

One part is listed for the 2026 Toyota Sienna — MELLING 1083.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

2 Timing Chain & Component Kit parts for the 2026 Toyota Sienna come from MELLING.

Listed part numbers: MELLING 31083SX and MELLING 31083S.

This table covers the guides and dampers that keep the timing chain on its path. Read more

MELLING supplies both parts for the 2026 Toyota Sienna.

Part numbers include MELLING BT7063 and MELLING BG7049.

This table covers the tensioners that keep the timing chain taut. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

This group shows a single part: MELLING BT7062.

This table covers the crankshaft sprockets that drive the timing chain or belt. Read more

2 Timing Crank Sprocket parts for the 2026 Toyota Sienna come from MELLING.

Listed part numbers: MELLING S1323 and MELLING S1324.

This table covers the springs that close each intake and exhaust valve. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

QUALCAST supplies both parts for the 2026 Toyota Sienna.

Part numbers include QUALCAST 325507 and QUALCAST 325508.

This table covers the cam phaser sprockets used by the variable-valve-timing system. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS VVT747.