This page lists 63 engine parts for the 2025 Lexus GX550, across 13 part types, covering the 3.4L V6 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
The engine on the 2025 Lexus GX550 covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Oil (32 parts), Oil Filter (10 parts) and Timing Chain Tensioner (4 parts). The other 10 part types cover the remaining 17 parts.
Every part on this page is matched to the 3.4L V6 Turbocharged — the only engine offered in the 2025 Lexus GX550.
The most listed brands for 2025 Lexus GX550 engine parts are MELLING (13 parts), VALVOLINE (10 parts) and MOBIL (8 parts), plus 15 more brands. Quality grades include Economy, Standard Replacement and High Performance / Heavy Duty.
8 parts on this 2025 Lexus GX550 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including LIQUI MOLY 2208 (Oil) and MOBIL M1103A (Oil Filter). Click any part number to see every vehicle that part fits.
Oil
Summary: Notes list SAE 0W-20 and SAE 5W-20. Confirm the weight on the filler cap before you buy. Replacement brands in this table include VALVOLINE, MOBIL and IDEMITSU.
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LIQUI MOLY Popular | 2208 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Special Tec AA 0W-205 Liter | View on Amazon |
| LIQUI MOLY Popular | 20438 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molygen New Generation 0W-205 Liter | View on Amazon |
| MOBIL Popular | 124184 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 0W-20Mobil 1 Advanced Fuel Economy | View on Amazon |
| MOBIL Popular | 125197 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic 0W-20Mobil Full Synthetic | View on Amazon |
| VALVOLINE Popular | VV916 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Protection Full Synthetic SAE 0W-201 Quart | View on Amazon |
| IDEMITSU | 30015229750 | 🇺🇸 US | IFG3 5W-20 SP/Motor Oil1 Quart | View on Amazon |
| IDEMITSU | 30015203750 | 🇺🇸 US | IFG3 0W-20 SP/Motor Oil1 Quart | View on Amazon |
| IDEMITSU | 30016051750 | 🇺🇸 US | IFG3 0W-20 SQ/GF-7A1 Quart | View on Amazon |
| IDEMITSU | 30016054750 | 🇺🇸 US | IFG3 5W-20 SQ/GF-7A1 Quart | View on Amazon |
| IDEMITSU | 30015229953 | 🇺🇸 US | IFG3 5W-20 SP/Motor Oil5 Quart | View on Amazon |
| IDEMITSU | 30016051953 | 🇺🇸 US | IFG3 0W-20 SQ/GF-7A5 Quart | View on Amazon |
| IDEMITSU | 30016054953 | 🇺🇸 US | IFG3 5W-20 SQ/GF-7A5 Quart | View on Amazon |
| LIQUI MOLY | 2207 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Special TEC AA 0W-201 Liter | View on Amazon |
| LIQUI MOLY | 20436 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Molygen New Generation 0W-201 Liter | View on Amazon |
| MOBIL | 120926 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended Performance 0W-20Mobil 1 Extended Performance | View on Amazon |
| MOBIL | 124592 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Truck & SUV 0W-20Mobil 1 Truck & SUV | View on Amazon |
| PENTOSIN | 8044210 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 0W-20-Pentospeed-DEXOS1 GEN31 Liter | View on Amazon |
| PENTOSIN | 8044317 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pento Speed FESAE 0W-20 | View on Amazon |
| PENTOSIN | 8044212 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 0W-20-Pentospeed-DEXOS1 GEN35 Liters | View on Amazon |
| PENTOSIN | 8044319 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pento Speed FESAE 0W-20 | View on Amazon |
| VALVOLINE | 891682 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended Protection Full Synthetic SAE 0W-201 Quart | View on Amazon |
| VALVOLINE | 904536 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Restore & Protect Full Synthetic SAE 0W-201 Quart | View on Amazon |
| VALVOLINE | 904538 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Restore & Protect Full Synthetic SAE 0W-205 Quart | View on Amazon |
| VALVOLINE | 881150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Protection Full Synthetic SAE 0W-20Easy Pour 5 Quart | View on Amazon |
| VALVOLINE | 898664 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Hybrid Vehicle Full Synthetic SAE 0W-205 Quart | View on Amazon |
High Mileage (>75,000 Miles)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL Popular | 125203 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic High Mileage 0W-20Mobil Full Synthetic | View on Amazon |
| MOBIL | 122535 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | High Mileage 0W-20Mobil 1 High Mileage | View on Amazon |
| MOBIL | 123836 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended Performance High Mileage 0W-20Extended Performance High Mileage Synthetic Motor Oil 0W-20, 1 Quart | View on Amazon |
| VALVOLINE | 833002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Life High Mileage SAE 0W-201 Quart | View on Amazon |
| VALVOLINE | 852400 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic High Mileage with Max Life Technology SAE 0W-201 Quart | View on Amazon |
| VALVOLINE | 881149 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Life High Mileage SAE 0W-20Easy Pour 5 Quart | View on Amazon |
| VALVOLINE | 881168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic High Mileage with Max Life Technology SAE 0W-20Easy Pour 5 Quart | View on Amazon |
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.
32 Oil parts are listed for the 2025 Lexus GX550, from VALVOLINE, MOBIL, IDEMITSU and 2 other brands. LIQUI MOLY 2208 carries the "Popular" badge. Full Synthetic and High Mileage (>75,000 Miles) are all represented, and Full Synthetic alone accounts for 25 parts.
Oil Drain Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 090038 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | StandardM12-1.25 | View on Amazon |
| DORMAN | 090049 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pilot PointM12-1.25 | View on Amazon |
| REIN | HWU0112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the drain plugs in the oil pan.
3 Oil Drain Plug parts are listed for the 2025 Lexus GX550, from DORMAN and REIN.
Part numbers include DORMAN 090038, DORMAN 090049 and REIN HWU0112.
Oil Filler Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | OC2312 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | PlasticScrewithoutn | View on Amazon |
| GATES | 31285 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| MOTORAD | MO155 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Material: Plastic, Rubber | View on Amazon |
This table covers the caps on the oil filler neck.
3 Oil Filler Cap parts are listed for the 2025 Lexus GX550, from CALORSTAT, GATES and MOTORAD.
This group includes CALORSTAT OC2312, GATES 31285 and MOTORAD MO155.
Oil Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FRAM | FF4386 | 🇺🇸 US 🇨🇦 CA | ForceSpin-on Oil Filter | View on Amazon |
| FRAM | FE4967 | 🇺🇸 US 🇨🇦 CA | Spin-OnTough Guard or Synthetic Endurance | View on Amazon |
| FVP | R7145 | 🇺🇸 US 🇨🇦 CA | Media Material: Enhanced CelluloseSpin-On Filter | View on Amazon |
| PRO-TEC | PXL57145 | 🇺🇸 US 🇨🇦 CA | Media Material: Enhanced CelluloseSpin-On Filter | View on Amazon |
| VARIOUS MFR | PG4476 | 🇺🇸 US 🇨🇦 CA | Spin-On | View on Amazon |
High Performance / Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL Popular | M1103A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Extended Performance | View on Amazon |
| WIX | 57145XP | 🇺🇸 US 🇨🇦 CA | XP Extreme DutyBest For Synthetic Motor Oils | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | PF1233 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentSpin-On | View on Amazon |
| VARIOUS MFR | PG4476EX | 🇺🇸 US 🇨🇦 CA | Extended LifeSpin-On | View on Amazon |
| WIX | 57145 | 🇺🇸 US 🇨🇦 CA | Media Material: Enhanced CelluloseSpin-On Filter | View on Amazon |
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.
10 Oil Filter parts are listed for the 2025 Lexus GX550, from FRAM, VARIOUS MFR, WIX and 4 other brands. MOBIL M1103A carries the "Popular" badge.
In the Economy grade, FRAM, FVP, PRO-TEC and 1 other brand supply 5 parts: the catalog's value-priced group. A representative part number is FRAM FF4386.
In the High Performance / Heavy Duty grade, MOBIL and WIX supply 2 parts: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is MOBIL M1103A.
The Standard Replacement section lists 3 options from ACDELCO, VARIOUS MFR and WIX — built to original-equipment specification. ACDELCO PF1233 is listed in this group.
Oil Pump Chain
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | 1108 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the chains that drive the oil pump.
This group shows a single part: MELLING 1108.
Timing Chain
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | 1106 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Primary Chain | View on Amazon |
| MELLING | 1107 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Secondary Chain | View on Amazon |
This table covers the timing chains that keep the cams in time with the crank.
2 Timing Chain parts for the 2025 Lexus GX550 come from MELLING.
Part numbers include MELLING 1106 and MELLING 1107.
Timing Chain & Component Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | 31106SX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Does Not Include SprocketsOil Pump Drive Components Included | View on Amazon |
This table covers kits that group a timing chain with the related tensioners and guides.
One part is listed for the 2025 Lexus GX550 — MELLING 31106SX.
Timing Chain Guide / Damper
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | BG7068 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Lower | View on Amazon |
| MELLING | BG7069 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Upper | View on Amazon |
| MELLING | BT7087 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Tensioner Arm | View on Amazon |
This table covers the guides and dampers that keep the timing chain on its path.
3 Timing Chain Guide / Damper parts for the 2025 Lexus GX550 come from MELLING.
This group includes MELLING BG7068, MELLING BG7069 and MELLING BT7087.
Timing Chain Tensioner
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | BT7083 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LeftSecondary | View on Amazon |
| MELLING | BT7084 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RightSecondary | View on Amazon |
| MELLING | BT7085 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gasket Not Included | View on Amazon |
| MELLING | BT7086 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rail Only | View on Amazon |
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.
MELLING supplies the 4 Timing Chain Tensioner parts for the 2025 Lexus GX550.
Listed part numbers: MELLING BT7083, MELLING BT7084 and MELLING BT7085, plus the other parts above.
Turbocharger Boost Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 5S15758 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Turbocharger Boost sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
This group shows a single part: WELLS 5S15758.
Valve Spring Retainer
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | VSR726 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Valve Spring retainers.
This group shows a single part: MELLING VSR726.
Valve Spring Retainer Keeper
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING | VL1100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the keepers that lock each valve-spring retainer to the stem.
This group shows a single part: MELLING VL1100.
Variable Valve Timing (VVT) Solenoid / Actuator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 2T1306 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Adjuster Magnet | View on Amazon |
This table covers the oil-control solenoids that command the cam phasers. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same.
One part is listed for the 2025 Lexus GX550 — WELLS 2T1306.
Buying Engine Parts for a 2025 Lexus GX550
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Confirm you have the 3.4L V6 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil and Oil Filter .
Frequently Asked Questions
How many engine parts fit the 2025 Lexus GX550?
Our catalog currently lists 63 engine parts for the 2025 Lexus GX550 across 13 subcategories and 18 brands, covering the 3.4L V6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 2025 Lexus GX550?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What oil viscosity is listed for the 2025 Lexus GX550?
Oil rows on this page include SAE 0W-20 and SAE 5W-20. Confirm the engine and the weight on the filler cap before you buy — high-mileage and standard fills can differ.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 Lexus GX550 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 Lexus GX550?
Every part on this page is matched to the 3.4L V6 Turbocharged engine. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Lexus GX550
Engine Parts for Other Lexus GX550 Years
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