2021 Honda Civic Engine Parts

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

3 Connecting Rod Bearing parts for the 2021 Honda Civic come from TOPLINE.

This group includes TOPLINE RBH54T, TOPLINE RBH45 and TOPLINE RBH53.

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

8 Conversion / Lower Gasket Set parts for the 2021 Honda Civic come from 4 brands — AJUSA, ELRING, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: AJUSA 54280700, AJUSA 54328000 and AJUSA 54314300, plus the other parts above.

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

TOPLINE supplies the 4 Crankshaft Main Bearing parts for the 2021 Honda Civic.

Part numbers include TOPLINE MBH54T, TOPLINE TWH54T and TOPLINE MBH53L, among others listed above.

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

17 Crankshaft Seal parts are listed for the 2021 Honda Civic, from ELRING, AJUSA, FEL-PRO and 4 other brands. FEL-PRO BS40800 carries the "Popular" badge.

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

5 Cylinder Head Bolt parts for the 2021 Honda Civic come from 4 brands — AJUSA, ELRING, FEL-PRO and 1 other brand.

Part numbers include AJUSA 81072000, AJUSA 81079400 and ELRING 778120, among others listed above.

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

15 Cylinder Head Gasket parts for the 2021 Honda Civic come from 5 brands — ELRING, APEX, AJUSA and 2 other brands. The "Popular" part is APEX AHG177.

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

9 Cylinder Head Gasket Set parts for the 2021 Honda Civic come from 4 brands — AJUSA, ELRING, MAHLE / CLEVITE and 1 other brand.

This group includes AJUSA 52524500, AJUSA 52632900 and AJUSA 52575500 and the remaining parts above.

This table covers the Engine covers. Read more

2 Engine Cover parts for the 2021 Honda Civic come from TECHPRO.

Part numbers include TECHPRO HO1228160 and TECHPRO HO1228163.

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

4 Engine Kit Gasket Set parts for the 2021 Honda Civic come from 2 brands — AJUSA and TOPLINE.

This group includes AJUSA 50477900, AJUSA 50562400 and AJUSA 50533800 and the remaining parts above.

This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

4 Exhaust Valve parts are listed for the 2021 Honda Civic, from TOPLINE, MELLING and QUALCAST.

Listed part numbers: MELLING V5839, QUALCAST 1030539 and TOPLINE EVH54T, plus the other parts above.

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

5 Harmonic Balancer parts for the 2021 Honda Civic come from 3 brands — ATP, PIONEER and ACKOJA.

Listed part numbers: ACKOJA A260411, ATP 102139 and ATP 102178, plus the other parts above.

This table covers the Intake & Exhaust Manifold gasket sets. 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

This group shows a single part: ELRING 884180.

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

7 Intake Manifold Gasket parts for the 2021 Honda Civic come from 4 brands — AJUSA, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: AJUSA 13293200, AJUSA 13355100 and ELRING 068630, plus the other parts above.

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

4 Intake Valve parts are listed for the 2021 Honda Civic, from TOPLINE, MELLING and QUALCAST.

Listed part numbers: MELLING V5840, QUALCAST 1030540 and TOPLINE IVH54T, plus the other parts above.

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

12 Motor Mount parts are listed for the 2021 Honda Civic, from ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 2 other brands. SKP SKM99519 carries the "Popular" badge.

In the Economy grade, SKP supplies 1 part: the catalog's value-priced group. A representative part number is SKP SKM99519.

The Standard Replacement section lists 8 options from ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 1 other brand — built to original-equipment specification. ANCHOR 9957 is listed in this group.

3 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the Motor Mount kits. Read more

ANCHOR supplies the 5 Motor Mount Kit parts for the 2021 Honda Civic.

Part numbers include ANCHOR 300453, ANCHOR 300916 and ANCHOR 300452, among others listed above.

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

36 Oil parts are listed for the 2021 Honda Civic, from LIQUI MOLY, VALVOLINE, MOBIL and 3 other brands. LIQUI MOLY 22044 carries the "Popular" badge. Full Synthetic and High Mileage (>75,000 Miles) are all represented, and Full Synthetic alone accounts for 29 parts.

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

7 Oil Drain Plug parts are listed for the 2021 Honda Civic, from DORMAN, ELRING, ACKOJA and 2 other brands. DORMAN 090053 carries the "Popular" badge. 4 parts fit every engine; the other 3 are engine-specific.

This group includes DORMAN 090053, DORMAN 090033 and ACKOJA A260253 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

6 Oil Drain Plug Gasket parts for the 2021 Honda Civic come from 6 brands — DORMAN, AJUSA, APEX and 3 other brands. The "Popular" part is DORMAN 095144. 4 parts fit every engine; the other 2 are engine-specific.

This group includes DORMAN 095144, AJUSA 22007400 and APEX ADP1909 and the remaining parts above.

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

3 Oil Filler Cap parts are listed for the 2021 Honda Civic, from CALORSTAT, GATES and MOTORAD. All of them fit every engine offered in the 2021 Civic.

Part numbers include CALORSTAT OC2335, GATES 31284 and MOTORAD MO159.

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

17 Oil Filter parts are listed for the 2021 Honda Civic, from BOSCH, VARIOUS MFR, WIX and 11 other brands. BOSCH 72226WS carries the "Popular" badge. 11 parts fit every engine; the other 6 are engine-specific.

Economy: 5 parts, from BOSCH, FVP, PRO-TEC and 2 other brands. A representative part number is BOSCH 72226WS.

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 M1110A.

The Standard Replacement section: 10 options from BOSCH, WIX, ACKOJA and 7 other brands. BOSCH 3323 is listed in this group.

This table covers the Oil Filter Adapter 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. Read more

This group shows a single part: MAHLE / CLEVITE B33713.

This table covers the Oil Filter Support tubes. Read more

This group shows a single part: AUTOTECNICA HA1416938.

This table covers the oil pans that hold the engine's oil sump. Read more

3 Oil Pan parts for the 2021 Honda Civic come from 2 brands — SPECTRA PREMIUM and ULTRA-POWER.

Part numbers include SPECTRA PREMIUM HOP40A, SPECTRA PREMIUM HOP39A and ULTRA-POWER 3310696.

This table covers the gaskets between the oil pan and the block. 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 2021 Honda Civic — VICTOR REINZ 703141410.

This table covers the Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

6 Oil Pump parts are listed for the 2021 Honda Civic, from TOPLINE, MELLING and ENGINETECH.

This group includes ENGINETECH EP570, MELLING M570 and MELLING M572 and the remaining parts above.

This table covers the chains that drive the oil pump. Read more

This group shows a single part: CLOYES C970.

This table covers the Oil Pump Chain tensioners. 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. Read more

2 Oil Pump Chain Tensioner parts are listed for the 2021 Honda Civic, from CLOYES and S.A. GEAR.

Listed part numbers: CLOYES 96096 and S.A. GEAR 91349.

This table covers the gaskets that seal the Oil Pump. 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: ELRING 108390.

This table covers the Oil Pump sprockets. Read more

This group shows a single part: S.A. GEAR S1475.

This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo. Read more

This group shows a single part: TOPLINE PAH54T.

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

This group shows a single part: TOPLINE RSH54T.

This table covers the timing chains that keep the cams in time with the crank. Read more

5 Timing Chain parts for the 2021 Honda Civic come from 4 brands — CLOYES, MELLING, PREFERRED COMPONENTS INC and 1 other brand.

Part numbers include CLOYES C984, CLOYES C969 and MELLING 1081, among others listed above.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

12 Timing Chain & Component Kit parts are listed for the 2021 Honda Civic, from CLOYES, S.A. GEAR, MELLING and 4 other brands. S.A. GEAR 76411T carries the "Popular" badge.

Economy: 3 parts, from S.A. GEAR and PREFERRED COMPONENTS INC. A representative part number is S.A. GEAR 76411T.

The Standard Replacement section: 9 options from CLOYES, MELLING, ENGINETECH and 2 other brands. CLOYES 90984SX is listed in this group.

This table covers the guides and dampers that keep the timing chain on its path. Read more

20 Timing Chain Guide / Damper parts for the 2021 Honda Civic come from 4 brands — CLOYES, S.A. GEAR, MELLING and 1 other brand. The "Popular" part is CLOYES 95993.

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. Read more

6 Timing Chain Tensioner parts are listed for the 2021 Honda Civic, from MELLING, PREFERRED COMPONENTS INC, S.A. GEAR and 1 other brand. MELLING BT7057 carries the "Popular" badge. 3 parts fit every engine; the other 3 are engine-specific.

This group includes MELLING BT7057, S.A. GEAR 91288 and CLOYES 95988 and the remaining parts above.

This table covers the Timing covers. Read more

This group shows a single part: ACKOJA A260180.

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. Read more

2 Timing Cover Gasket parts are listed for the 2021 Honda Civic, from ELRING and MAHLE / CLEVITE.

This group includes ELRING 703520 and MAHLE / CLEVITE JV5277.

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 are listed for the 2021 Honda Civic, from MAHLE / CLEVITE and SKF. All of them fit every engine offered in the 2021 Civic.

Listed part numbers: MAHLE / CLEVITE 68064 and SKF 16896.

This table covers the crankshaft sprockets that drive the timing chain or belt. Read more

5 Timing Crank Sprocket parts are listed for the 2021 Honda Civic, from CLOYES, MELLING, PREFERRED COMPONENTS INC and 1 other brand.