2020 Mazda 3 Engine Parts

This table covers the Barometric pressure sensors. Typical signs include a check-engine light for MAP or fuel-rail pressure, or a limp mode under load. A vacuum leak or a clogged reference line will fake a bad pressure sensor. Read more

One part is listed for the 2020 Mazda 3 — STANDARD MOTOR PRODUCTS AS486.

This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

One part is listed for the 2020 Mazda 3 — ENGINETECH BB1081.

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. Read more

One part is listed for the 2020 Mazda 3 — AJUSA 54316900.

This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

This group shows a single part: ENGINETECH BC3201.

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. Read more

6 Crankshaft Seal parts for the 2020 Mazda 3 come from 4 brands — ELRING, AJUSA, SKF and 1 other brand. The "Popular" part is ELRING 935590.

Listed part numbers: ELRING 935590, ELRING 935630 and AJUSA 15105400, plus the other parts above.

This table covers the bolts that clamp the cylinder head to the block. Read more

3 Cylinder Head Bolt parts are listed for the 2020 Mazda 3, from AJUSA, FEL-PRO and MAHLE / CLEVITE.

This group includes AJUSA 81035200, FEL-PRO ES72207 and MAHLE / CLEVITE GS33489.

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. Read more

One part is listed for the 2020 Mazda 3 — AJUSA 10215400.

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. Read more

One part is listed for the 2020 Mazda 3 — AJUSA 52403400.

This table covers the block heaters that warm the coolant or oil in cold weather. Read more

This group shows a single part: KAT'S HEATERS 11409.

This table covers the Engine covers. Read more

7 Engine Cover parts are listed for the 2020 Mazda 3, from TECHPRO and VARIOUS MFR. TECHPRO MA1228130 carries the "Popular" badge.

Listed part numbers: TECHPRO MA1228130, TECHPRO MA1228135 and TECHPRO MA1228131, plus the other parts above.

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. Read more

One part is listed for the 2020 Mazda 3 — AJUSA 50539600.

This table covers the crankshaft pulleys / harmonic balancers at the front of the engine. Read more

2 Harmonic Balancer parts are listed for the 2020 Mazda 3, from ATP and DAYCO.

This group includes ATP 102485 and DAYCO PB1819N.

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. Read more

One part is listed for the 2020 Mazda 3 — AJUSA 13261100.

This table covers the mounts that hold the engine to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

3 Motor Mount parts for the 2020 Mazda 3 come from 3 brands — ANCHOR, DEA / MARMON RIDE CONTROL and WESTAR.

This group includes ANCHOR 10203, DEA / MARMON RIDE CONTROL A4457 and WESTAR EM7523.

This table covers the Motor Mount kits. Read more

This group shows a single part: ANCHOR 300907.

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

15 Oil parts for the 2020 Mazda 3 come from 3 brands — MOBIL, VALVOLINE and PENTOSIN. The "Popular" part is MOBIL 125197.

The Full Synthetic section lists 12 options from VALVOLINE, PENTOSIN and MOBIL — full-synthetic oils. MOBIL 125197 is listed in this group.

In the High Mileage (>75,000 Miles) grade, MOBIL supplies 3 parts: oils grouped for high-mileage engines. A representative part number is MOBIL 125203.

This table covers the drain plugs in the oil pan. Read more

5 Oil Drain Plug parts for the 2020 Mazda 3 come from ELRING. The "Popular" part is ELRING 523500.

This group includes ELRING 523500, ELRING 523480 and ELRING 087210 and the remaining parts above.

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. Read more

5 Oil Drain Plug Gasket parts are listed for the 2020 Mazda 3, from DORMAN, AJUSA, ELRING and 1 other brand. DORMAN 095147 carries the "Popular" badge.

Part numbers include DORMAN 095147, AJUSA 22007000 and DORMAN 995147CD, among others listed above.

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

2 Oil Filler Cap parts for the 2020 Mazda 3 come from 2 brands — MOTORAD and SKP.

Part numbers include MOTORAD MO147 and SKP SKMO147.

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 2020 Mazda 3 come from 8 brands — VARIOUS MFR, CHAMP / LUBER-FINER, FVP and 5 other brands. The "Popular" part is CHAMP / LUBER-FINER PH2876.

The Economy section lists 4 options from CHAMP / LUBER-FINER, FVP, PRO-TEC and 1 other brand — the catalog's value-priced group. CHAMP / LUBER-FINER PH2876 is listed in this group.

The High Performance / Heavy Duty section lists 1 option from MOBIL — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. MOBIL M1108A is listed in this group.

In the Standard Replacement grade, HASTINGS / BALDWIN, MOTORCRAFT, VARIOUS MFR and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is HASTINGS / BALDWIN LF113.

Listed part numbers: CHAMP / LUBER-FINER PH2876, FVP R7002 and PRO-TEC PXL57002, plus the other parts above.

This table covers the seals at the Oil Filter Housing. 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. Read more

This group shows a single part: ELRING 935470.

This table covers the gaskets that seal the Oil Pressure Relief Valve. 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. Read more

One part is listed for the 2020 Mazda 3 — ELRING 094550.

This table covers the Oil Pump sprockets. Read more

One part is listed for the 2020 Mazda 3 — PREFERRED COMPONENTS INC G57326.

This table covers the rings that seal each piston to the cylinder wall. Read more

3 Piston Ring parts are listed for the 2020 Mazda 3, from ENGINETECH, HASTINGS MANUFACTURING and ITM ENGINE COMPONENTS.

The Premium section lists 1 option from ENGINETECH — a step above OE specification in materials, tolerances or warranty terms. ENGINETECH S32874 is listed in this group.

The Standard Replacement section: 2 options from HASTINGS MANUFACTURING and ITM ENGINE COMPONENTS. HASTINGS MANUFACTURING 2N6037 is listed in this group.

Part numbers include ENGINETECH S32874, HASTINGS MANUFACTURING 2N6037 and ITM ENGINE COMPONENTS 0219284.

This table covers the Thrust washers. Read more

This group shows a single part: ENGINETECH TW3201.

This table covers the seals at the Timing Cover. 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. Read more

2 Timing Cover Seal parts for the 2020 Mazda 3 come from 2 brands — SKF and WJB / INMOTION PARTS.

Part numbers include SKF 16880A and WJB / INMOTION PARTS WS16880A.

This table covers the Torque Strut mounts. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

4 Torque Strut Mount parts are listed for the 2020 Mazda 3, from ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 1 other brand.

Part numbers include ANCHOR 10212, DEA / MARMON RIDE CONTROL A4461 and PIONEER 630212, among others listed above.

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. Read more

This group shows a single part: AJUSA 11137100.

This table covers the lifters / tappets that transfer cam motion to the valves. Read more

This group shows a single part: AJUSA 85009300.

This table covers the keepers that lock each valve-spring retainer to the stem. Read more

4 Valve Spring Retainer Keeper parts are listed for the 2020 Mazda 3, from ENGINETECH, MELLING, QUALCAST and 1 other brand.

Part numbers include ENGINETECH EPF1104, MELLING VL1125 and QUALCAST 345024, among others listed above.

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. Read more

3 Valve Stem Seal parts for the 2020 Mazda 3 come from AJUSA.

Listed part numbers: AJUSA 57070800, AJUSA 12034400 and AJUSA 12034500.

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. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS VVT224.