2019 BMW 120I Engine Parts

Engine:
2.0L L4 Turbocharged

This page lists 34 engine parts for the 2019 BMW 120I, across 22 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.

On the 2019 BMW 120I, 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. 9 parts of the 34 listed are Valve Stem Seal (4 parts), Turbocharger Gasket (3 parts) and Crankshaft Seal (2 parts). The other 19 part types cover the remaining 25 parts.

Conversion / Lower Gasket Set

Brand Part Number Markets Notes Buy
AJUSA 54263900
🇲🇽 MX
Engine # B48B20A
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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.

Crankshaft Seal

Brand Part Number Markets Notes Buy
AJUSA 15075200
🇲🇽 MX
FrontClockwise
Fitment notes — AJUSA 15075200
FrontClockwiseEngine # B48B20A
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AJUSA 15107900
🇲🇽 MX
RearCounter Clockwise
Fitment notes — AJUSA 15107900
RearCounter ClockwiseEngine # B48B20A
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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.

Cylinder Head Bolt

Brand Part Number Markets Notes Buy
AJUSA 81065000
🇲🇽 MX
Engine # B48B20A
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This table covers the bolts that clamp the cylinder head to the block.

Cylinder Head Gasket

Brand Part Number Markets Notes Buy
AJUSA 10220600
🇲🇽 MX
Multi Layered SteelThickness: 0.7 MM
Fitment notes — AJUSA 10220600
Multi Layered SteelThickness: 0.7 MM
83 Bore DiameterEngine # B48B20A
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AJUSA 10220610
🇲🇽 MX
Multi Layered SteelThickness: 1 MM
Fitment notes — AJUSA 10220610
Multi Layered SteelThickness: 1 MM
83 Bore DiameterEngine # B48B20A
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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.

Cylinder Head Gasket Set

Brand Part Number Markets Notes Buy
AJUSA 52503900
🇲🇽 MX
Engine # B48B20A
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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.

Engine Kit Gasket Set

Brand Part Number Markets Notes Buy
AJUSA 50453600
🇲🇽 MX
Engine # B48B20A
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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.

Oil Cooler

Brand Part Number Markets Notes Buy
MARELLI RO0044
🇲🇽 MX
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This table covers the heat exchangers that cool engine oil. Typical signs include oil at the cooler fittings, or coolant that looks like a milkshake. Pressure-test both circuits after a cooler swap — a leak here mixes oil and coolant.

Oil Cooler Gasket

Brand Part Number Markets Notes Buy
AJUSA 77005900
🇲🇽 MX
UpperEngine # B48B20A
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AJUSA 77006000
🇲🇽 MX
LowerEngine # B48B20A
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This table covers the gaskets that seal the Oil Cooler. 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.

Oil Drain Plug

Brand Part Number Markets Notes Buy
AGS ODP00010
🇲🇽 MX
M12x1.50
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DORMAN 090088
🇲🇽 MX
MetalStandard
Fitment notes — DORMAN 090088
MetalStandardThread SizeM12-1.50Under-Head Length: 16.95mmHead Size: 17mmHead Style: Hex
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This table covers the drain plugs in the oil pan.

Oil Drain Plug Gasket

Brand Part Number Markets Notes Buy
AJUSA 21010400
🇲🇽 MX
Fits Engine # B48B20Awith Original Equipment (OE) # 7119963132
Fitment notes — AJUSA 21010400
Fits:
Engine # B48B20Awith Original Equipment (OE) # 7119963132
or:
M SportEngine # B48B20A
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This table covers the crush washers and gaskets under the oil drain plug. 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.

Oil Filler Cap

Brand Part Number Markets Notes Buy
MOTORAD MO156
🇲🇽 MX
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This table covers the caps on the oil filler neck.

Oil Filter

High Performance / Heavy Duty

Brand Part Number Markets Notes Buy
MOBIL M1C354A
🇲🇽 MX
Extended Performance
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Standard Replacement

Brand Part Number Markets Notes Buy
VARIOUS MFR PO99460EX
🇲🇽 MX
Extended Life
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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.

Oil Filter Cover

Brand Part Number Markets Notes Buy
DORMAN 921115
🇲🇽 MX
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SKP SK921115
🇲🇽 MX
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This table covers the Oil Filter covers.

Timing Cover Gasket

Brand Part Number Markets Notes Buy
AJUSA 77090600
🇲🇽 MX
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This table covers the gaskets that seal the Timing Cover. 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.

Turbocharger Gasket

Brand Part Number Markets Notes Buy
AJUSA JTC11993
🇲🇽 MX
Mounting Gasket Set
Fitment notes — AJUSA JTC11993
Mounting Gasket Set
Engine # B48B20A
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ELRING 094830
🇲🇽 MX
Charge Air Hose
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ELRING 074140
🇲🇽 MX
Suction PipeInlet Gasket
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This table covers the gaskets that seal the Turbocharger. 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.

Turbocharger Oil Line

Brand Part Number Markets Notes Buy
AJUSA OP10925
🇲🇽 MX
Engine # B48B20ASupply Tube
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This table covers the Turbocharger Oil lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early.

Turbocharger Oil Line Gasket / O-Ring

Brand Part Number Markets Notes Buy
AJUSA 16006101
🇲🇽 MX
Turbocharger Coolant Line O-Ring
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This table covers the Turbocharger Oil Line Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove.

Turbocharger Wastegate Solenoid / Actuator

Brand Part Number Markets Notes Buy
DORMAN 667845
🇲🇽 MX
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This table covers the Turbocharger Wastegate Solenoid actuators. 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.

Valve Cover

Brand Part Number Markets Notes Buy
DORMAN 264772
🇲🇽 MX
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SKP SK743462
🇲🇽 MX
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This table covers the Valve covers.

Valve Cover Gasket

Brand Part Number Markets Notes Buy
AJUSA 11140100
🇲🇽 MX
Engine # B48B20A
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This table covers the gaskets that seal the valve cover 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.

Valve Lifter

Brand Part Number Markets Notes Buy
AJUSA 85022300
🇲🇽 MX
Engine # B48B20A
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This table covers the lifters / tappets that transfer cam motion to the valves.

Valve Stem Seal

Brand Part Number Markets Notes Buy
AJUSA 57067700
🇲🇽 MX
Engine # B48B20A
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AJUSA 12027900
🇲🇽 MX
Intake4.5 x 9.8 x 21.5
Fitment notes — AJUSA 12027900
Intake4.5 x 9.8 x 21.5Engine # B48B20A
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AJUSA 12028200
🇲🇽 MX
Exhaust5.2 x 9.8 x 21.15
Fitment notes — AJUSA 12028200
Exhaust5.2 x 9.8 x 21.15Engine # B48B20A
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ELRING 364510
🇲🇽 MX
Height: 21mmDiameter: 6mm
Fitment notes — ELRING 364510
Height: 21mmDiameter: 6mmInner Diameter: 10mmOuter Diameter: 22.7mmwith OEM # 11340034055, 11340034069, 11340035853, 11340038720Green
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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.

Buying Engine Parts for a 2019 BMW 120I

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 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: Valve Stem Seal and Turbocharger Gasket .

Frequently Asked Questions

How many engine parts fit the 2019 BMW 120I?

Our catalog currently lists 34 engine parts for the 2019 BMW 120I across 22 subcategories and 9 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.

What are the signs of engine problems on a 2019 BMW 120I?

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 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 2019 BMW 120I 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 2019 BMW 120I?

Every part on this page is matched to the 2.0L L4 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 2019 BMW 120I

Engine Parts for Other BMW 120I Years

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.