2021 Ford Bronco Cooling System Parts

This table covers the Auxiliary Water Pump hoses. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

MOTORCRAFT supplies the 4 Auxiliary Water Pump Hose parts for the 2021 Ford Bronco.

Part numbers include MOTORCRAFT KM6859, MOTORCRAFT KM6888 and MOTORCRAFT KM7040, among others listed above.

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

16 Coolant / Antifreeze parts are listed for the 2021 Ford Bronco, from PRESTONE, PEAK, FVP and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 10 parts fit every engine; the other 6 are engine-specific.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 5 options from PRESTONE, ACDELCO, AISIN and 1 other brand — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

4 Coolant Hose / Pipe parts are listed for the 2021 Ford Bronco, from MOTORCRAFT and GATES.

Part numbers include GATES 52560, MOTORCRAFT KM7372 and MOTORCRAFT KM7042, among others listed above.

This table covers the seals at the Coolant Hose / Pipe. 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

5 Coolant Hose / Pipe Seal parts for the 2021 Ford Bronco come from 4 brands — ELRING, DORMAN, FEL-PRO and 1 other brand.

Part numbers include DORMAN 47450, ELRING 920410 and ELRING 097360, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2021 Ford Bronco — MOTORCRAFT RH307.

This table covers the seals at the Coolant Hose Connector / Flange. 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 649950.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

3 Coolant Reservoir parts for the 2021 Ford Bronco come from 2 brands — TECHPRO and VARIOUS MFR.

Part numbers include TECHPRO FO3014182 and TECHPRO FO3014181, among others listed above.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

5 Coolant Reservoir Cap parts for the 2021 Ford Bronco come from 5 brands — MOTORAD, CALORSTAT, GATES and 2 other brands. The "Popular" part is MOTORAD T57. Every part fits all 4 engine options (1.5L L3 Turbocharged, 2.0L L4 Turbocharged, 2.3L L4 Turbocharged and 2.7L V6 Turbocharged).

Listed part numbers: MOTORAD T57, CALORSTAT RC0150 and GATES 31549, plus the other parts above.

This table covers the Coolant Reservoir retainers and clips. Read more

One part is listed for the 2021 Ford Bronco — DORMAN 963249D.

This table covers the seals at the Coolant Reservoir. 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 Coolant Reservoir Seal parts are listed for the 2021 Ford Bronco, from MOTORCRAFT and SKP.

Listed part numbers: MOTORCRAFT RTS1073 and SKP SKY01479.

This table covers the adapters used to pressure-test this cooling system. Read more

One part is listed for the 2021 Ford Bronco — MOTORAD 3043.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

6 Intercooler parts are listed for the 2021 Ford Bronco, from MOTORCRAFT, TYC, GPD and 1 other brand.

Listed part numbers: GPD 2711554, MOTORCRAFT INTCO29 and MOTORCRAFT INTCO1, plus the other parts above.

This table covers the Intercooler Air Hose pipes. Read more

GATES supplies both parts for the 2021 Ford Bronco.

Listed part numbers: GATES 29034 and GATES 29040.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

11 Radiator parts are listed for the 2021 Ford Bronco, from CSF, TYC, KOYORAD and 3 other brands. CSF 3962 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 13915C.

The Standard Replacement section: 5 options from CSF, TYC, KOYORAD and 2 other brands. CSF 3962 is listed in this group.

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

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

One part is listed for the 2021 Ford Bronco — MOTORCRAFT RS531.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

13 Radiator Fan Assembly parts for the 2021 Ford Bronco come from 7 brands — MOTORCRAFT, TYC, GPD and 4 other brands. The "Popular" part is MOTORCRAFT RF450.

The Economy section: 5 options from GPD, TECHPRO and SKP. GPD 2812262 is listed in this group.

Standard Replacement: 8 parts, from MOTORCRAFT, TYC, FOUR SEASONS and 1 other brand. A representative part number is MOTORCRAFT RF450.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

17 Radiator Hose parts for the 2021 Ford Bronco come from 2 brands — MOTORCRAFT and GATES. The "Popular" part is MOTORCRAFT KM7118.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

20 Temperature Sender / Sensor parts are listed for the 2021 Ford Bronco, from STANDARD MOTOR PRODUCTS, HOLSTEIN, MOTORCRAFT and 7 other brands. HOLSTEIN 2CTS0297 carries the "Popular" badge.

Economy: 6 parts, from HOLSTEIN, GPD and VEMO. A representative part number is HOLSTEIN 2CTS0297.

The Standard Replacement section: 12 options from MOTORCRAFT, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 3 other brands. MOTORCRAFT DY1553 is listed in this group.

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

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

21 Thermostat parts for the 2021 Ford Bronco come from 3 brands — MOTORAD, MOTORCRAFT and MAHLE / CLEVITE. The "Popular" part is MOTORAD 655170.

Heavy Duty: 2 parts, from MOTORAD. A representative part number is MOTORAD 5655188.

The Performance section lists 3 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2655188 is listed in this group.

Premium: 1 part, from MOTORAD. A representative part number is MOTORAD 7655188.

Standard Replacement: 9 parts, from MOTORAD, MOTORCRAFT and MAHLE / CLEVITE. A representative part number is MOTORAD 655170.

6 further parts sit outside the graded sections, with the same engine-level match.

This table covers the seals at the thermostat housing and water outlet. 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

15 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Ford Bronco, from FEL-PRO, MAHLE / CLEVITE, ELRING and 3 other brands. FEL-PRO 35839 carries the "Popular" badge.

This table covers the housings and outlets the thermostat sits in. Read more

6 Thermostat Housing / Water Outlet parts for the 2021 Ford Bronco come from 4 brands — MOTORAD, MOTORCRAFT, FOUR SEASONS and 1 other brand.

Listed part numbers: FOUR SEASONS 86315, GATES CO35007 and MOTORAD CH1052, plus the other parts above.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

17 Water Pump parts for the 2021 Ford Bronco come from 6 brands — FVP, GATES, MOTORCRAFT and 3 other brands. The "Popular" part is GATES 41229.

The Economy section: 4 options from FVP and US MOTOR WORKS. FVP US8181 is listed in this group.

Standard Replacement: 9 parts, from GATES, MOTORCRAFT, GMB and 2 other brands. A representative part number is GATES 41229.

4 further parts sit outside the graded sections, with the same engine-level match.

This table covers the gaskets between the water pump and the block or housing. 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

3 Water Pump Gasket parts are listed for the 2021 Ford Bronco, from MAHLE / CLEVITE and ELRING.

Part numbers include ELRING 634910, MAHLE / CLEVITE K33850 and MAHLE / CLEVITE K33855.

This table covers the Water Pump housings. Read more

One part is listed for the 2021 Ford Bronco — MOTORAD CH3103.

This table covers the Water Pump Inlet tubes. Read more

This group shows a single part: MOTORCRAFT KH1166.