26 Engine parts are listed for the 2004 Alfa Romeo 156, in 10 part types, covering the 2.0L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2004 Alfa Romeo 156, 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. Most of the listed parts are Crankshaft Seal (5 parts), Oil (5 parts) and Camshaft Seal (3 parts). The other 7 part types cover the remaining 13 parts.
The 2004 Alfa Romeo 156 came with a single engine, the 2.0L L4, and every part is verified against it.
3 brands supply engine parts for the 2004 Alfa Romeo 156, led by AJUSA (12 parts), ELRING (9 parts) and VALVOLINE (5 parts).
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2004 Alfa Romeo 156. 2 parts have it, including ELRING 069590 (Crankshaft Seal) and VALVOLINE VV966 (Oil). Each part number opens a page with every vehicle that part fits.
Camshaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 93019400 | 🇲🇽 MX | IntakeEngine # 323.10 | View on Amazon |
| AJUSA | 93020100 | 🇲🇽 MX | Exhaust | View on Amazon |
This table covers the camshafts that open the valves.
AJUSA supplies both parts for the 2004 Alfa Romeo 156.
Listed part numbers: AJUSA 93019400 and AJUSA 93020100.
Camshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 15008200 | 🇲🇽 MX | FrontClockwise | View on Amazon |
| AJUSA | 15055300 | 🇲🇽 MX | RearClockwise | View on Amazon |
| ELRING | 505838 | 🇲🇽 MX | Dust Cover: with dust LipHeight [MM]: 7 | 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.
3 Camshaft Seal parts for the 2004 Alfa Romeo 156 come from 2 brands — AJUSA and ELRING.
Part numbers include AJUSA 15008200, AJUSA 15055300 and ELRING 505838.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 54110000 | 🇲🇽 MX | Engine 323.10 | View on Amazon |
| ELRING | 431250 | 🇲🇽 MX | with Crankshaft Seal | 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.
2 Conversion / Lower Gasket Set parts are listed for the 2004 Alfa Romeo 156, from AJUSA and ELRING.
This group includes AJUSA 54110000 and ELRING 431250.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Popular | 069590 | 🇲🇽 MX | Inner Diameter [mm]: 31Radial Shaft Seal Design: AwithBS | View on Amazon |
| AJUSA | 15055200 | 🇲🇽 MX | FrontClockwise | View on Amazon |
| AJUSA | 71000800 | 🇲🇽 MX | RearEngine 323.10 | View on Amazon |
| ELRING | 477010 | 🇲🇽 MX | Inner Diameter [mm]: 55Material: FPM (Fluoride Rubber) | View on Amazon |
| ELRING | 199191 | 🇲🇽 MX | with Mounting SleeveMaterial: FPM (Fluoride Rubber) | 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.
5 Crankshaft Seal parts for the 2004 Alfa Romeo 156 come from 2 brands — ELRING and AJUSA. The "Popular" part is ELRING 069590.
Listed part numbers: ELRING 069590, AJUSA 15055200 and AJUSA 71000800, plus the other parts above.
Cylinder Head Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 81018000 | 🇲🇽 MX | Engine 323.10 | View on Amazon |
| ELRING | 152080 | 🇲🇽 MX | Set | View on Amazon |
This table covers the bolts that clamp the cylinder head to the block.
2 Cylinder Head Bolt parts are listed for the 2004 Alfa Romeo 156, from AJUSA and ELRING.
This group includes AJUSA 81018000 and ELRING 152080.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 10135900 | 🇲🇽 MX | Multi Layered Steel | View on Amazon |
| ELRING | 862553 | 🇲🇽 MX | Diameter [MM]: 83,8Gasket Design: Multilayer Steel (MLS) | 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 are listed for the 2004 Alfa Romeo 156, from AJUSA and ELRING.
This group includes AJUSA 10135900 and ELRING 862553.
Cylinder Head Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 52187600 | 🇲🇽 MX | Engine 323.10 | View on Amazon |
| ELRING | 472180 | 🇲🇽 MX | with valve stem seals,with cylinder head cover gasket,with camshaft seal | View on Amazon |
This table covers multi-piece gasket sets for a cylinder-head job. 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.
2 Cylinder Head Gasket Set parts are listed for the 2004 Alfa Romeo 156, from AJUSA and ELRING.
Part numbers include AJUSA 52187600 and ELRING 472180.
Engine Kit Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 50203100 | 🇲🇽 MX | Engine # 323.10 | 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.
One part is listed for the 2004 Alfa Romeo 156 — AJUSA 50203100.
Intake Manifold Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 13116900 | 🇲🇽 MX | Engine 323.10 | View on Amazon |
| ELRING | 875490 | 🇲🇽 MX | ComfortBody code: MRB69A | View on Amazon |
This table covers the gaskets between the intake manifold and 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 Intake Manifold Gasket parts are listed for the 2004 Alfa Romeo 156, from AJUSA and ELRING.
Listed part numbers: AJUSA 13116900 and ELRING 875490.
Oil
Summary: Notes list SAE 5W-40 and SAE 10W-40. Confirm the weight on the filler cap before you buy. Replacement brands in this table include VALVOLINE.
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | 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 |
High Mileage (>75,000 Miles)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 797977 | 🇲🇽 MX | High Mileage with Max Life Technology Synthetic Blend SAE 10W-401 Quart | View on Amazon |
| VALVOLINE | 881148 | 🇲🇽 MX | High Mileage with Max Life Technology Synthetic Blend SAE 10W-40Easy 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.
5 Oil parts for the 2004 Alfa Romeo 156 come from VALVOLINE. The "Popular" part is VALVOLINE VV966.
The Full Synthetic section lists 3 options from VALVOLINE — full-synthetic oils. VALVOLINE VV966 is listed in this group.
In the High Mileage (>75,000 Miles) grade, VALVOLINE supplies 2 parts: oils grouped for high-mileage engines. A representative part number is VALVOLINE 797977.
Listed part numbers: VALVOLINE VV966, VALVOLINE 881166 and VALVOLINE 881050, plus the other parts above.
Buying Engine Parts for a 2004 Alfa Romeo 156
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 2.0L L4 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: Crankshaft Seal and Oil .
Frequently Asked Questions
How many engine parts fit the 2004 Alfa Romeo 156?
Our catalog currently lists 26 engine parts for the 2004 Alfa Romeo 156 across 10 subcategories and 3 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 2004 Alfa Romeo 156?
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 2004 Alfa Romeo 156?
Oil rows on this page include SAE 5W-40 and SAE 10W-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 2004 Alfa Romeo 156 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 2004 Alfa Romeo 156?
Every part on this page is matched to the 2.0L L4 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 2004 Alfa Romeo 156
Engine Parts for Other Alfa Romeo 156 Years
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