15 Engine parts are listed for the 2003 MG ZT, in 8 part types, covering the 2.5L V6 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The engine on the 2003 MG ZT 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 (3 parts), Camshaft Seal (2 parts) and Crankshaft Seal (2 parts). The other 5 part types cover the remaining 8 parts.
Every part on this page is matched to the 2.5L V6 — the only engine offered in the 2003 MG ZT.
The most listed brands for 2003 MG ZT engine parts are AJUSA (12 parts) and VALVOLINE (3 parts).
Each part number listed for the 2003 MG ZT opens a page with every vehicle that part fits.
Camshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 15008100 | 🇲🇽 MX | ClockwiseEngine # KV6,25K4F | View on Amazon |
| AJUSA | 15056300 | 🇲🇽 MX | Counter ClockwiseEngine # KV6,25K4F | View on Amazon |
This table covers the seals at each camshaft end. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
AJUSA supplies both parts for the 2003 MG ZT.
Listed part numbers: AJUSA 15008100 and AJUSA 15056300.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 54136400 | 🇲🇽 MX | Engine # KV6,25K4F | View on Amazon |
This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
This group shows a single part: AJUSA 54136400.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 15049000 | 🇲🇽 MX | FrontClockwise | View on Amazon |
| AJUSA | 71002000 | 🇲🇽 MX | RearEngine # KV6,25K4F | View on Amazon |
This table covers the front and rear seals that keep oil in at the crankshaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
AJUSA supplies both parts for the 2003 MG ZT.
Part numbers include AJUSA 15049000 and AJUSA 71002000.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 10137700 | 🇲🇽 MX | Multi Layered Steel | View on Amazon |
| AJUSA | 52337000 | 🇲🇽 MX | Fits LeftEngine # KV6,25K4F | View on Amazon |
This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
2 Cylinder Head Gasket parts for the 2003 MG ZT come from AJUSA.
Listed part numbers: AJUSA 10137700 and AJUSA 52337000.
Engine Kit Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 50207600 | 🇲🇽 MX | Engine # KV6,25K4F | View on Amazon |
This table covers full gasket kits covering the joints opened in an engine rebuild. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
This group shows a single part: AJUSA 50207600.
Intake Plenum Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 00754200 | 🇲🇽 MX | Engine # KV6,25K4F | View on Amazon |
| AJUSA | 01091400 | 🇲🇽 MX | UpperEngine # KV6,25K4F | View on Amazon |
This table covers the gaskets that seal the Intake Plenum. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
AJUSA supplies both parts for the 2003 MG ZT.
Listed part numbers: AJUSA 00754200 and AJUSA 01091400.
Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | VV966 | 🇲🇽 MX | European Vehicle Full Synthetic SAE 5W-401 Quart | View on Amazon |
| VALVOLINE | 881166 | 🇲🇽 MX | European Vehicle Full Synthetic SAE 5W-40Easy Pour 5 Quart | View on Amazon |
| VALVOLINE | 881050 | 🇲🇽 MX | European Vehicle Full Synthetic SAE 5W-405 Gallon Bay Box | 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.
VALVOLINE supplies the 3 Oil parts for the 2003 MG ZT.
Listed part numbers: VALVOLINE VV966, VALVOLINE 881166 and VALVOLINE 881050.
Valve Stem Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 12010100 | 🇲🇽 MX | Engine # KV6,25K4F | View on Amazon |
| AJUSA | 57057700 | 🇲🇽 MX | Engine # KV6,25K4F | View on Amazon |
This table covers the seals on each valve stem that control oil into the guides. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
AJUSA supplies both parts for the 2003 MG ZT.
This group includes AJUSA 12010100 and AJUSA 57057700.
Buying Engine Parts for a 2003 MG ZT
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 2.5L V6 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 Camshaft Seal .
Frequently Asked Questions
How many engine parts fit the 2003 MG ZT?
Our catalog currently lists 15 engine parts for the 2003 MG ZT across 8 subcategories and 2 brands, covering the 2.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 2003 MG ZT?
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 2003 MG ZT?
Oil rows on this page include SAE 5W-40. 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 2003 MG ZT 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 2003 MG ZT?
Every part on this page is matched to the 2.5L V6 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 2003 MG ZT
Engine Parts for Other MG ZT Years
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