2018 BMW 340I Cooling System Parts

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

13 Coolant / Antifreeze parts are listed for the 2018 BMW 340I, from PRESTONE, PEAK, VALVOLINE and 2 other brands. FVP MV5050GAL carries the "Popular" badge.

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

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 3 options from AISIN, PEAK and VALVOLINE — built to original-equipment specification. AISIN ACE008 is listed in this group.

This table covers the bleeders used to purge air from the coolant circuit. Read more

5 Coolant Air Bleeder parts for the 2018 BMW 340I come from 3 brands — DORMAN, SKP and ÜRO PARTS. The "Popular" part is DORMAN 902404HP.

Part numbers include DORMAN 902404HP, DORMAN 902404 and SKP SK902404, among others listed above.

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

REIN supplies the 3 Coolant Hose / Pipe parts for the 2018 BMW 340I.

This group includes REIN CHE0994, REIN CHE1003 and REIN CHE1026.

This table covers the Coolant Hose Connector flanges. Read more

REIN supplies both parts for the 2018 BMW 340I.

Listed part numbers: REIN CHU0940 and REIN CHK0940.

This table covers the Coolant Hose Flange plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

2 Coolant Hose Flange Plug parts are listed for the 2018 BMW 340I, from REIN and VAICO.

Listed part numbers: REIN CHM0562 and VAICO V202821.

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

8 Coolant Reservoir parts for the 2018 BMW 340I come from 5 brands — REIN, MAHLE / CLEVITE, ÜRO PARTS and 2 other brands. The "Popular" part is REIN EPK0235.

Listed part numbers: REIN EPK0235, ÜRO PARTS 17138677649 and GPD 2411316, plus the other parts 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 2018 BMW 340I come from 3 brands — MOTORAD, CALORSTAT and REIN. The "Popular" part is MOTORAD T64.

Listed part numbers: MOTORAD T64, CALORSTAT RC0084 and CALORSTAT RC0083, plus the other parts above.

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

9 Radiator parts are listed for the 2018 BMW 340I, from NISSENS, GPD, VEMO and 4 other brands. KOYORAD A13782 carries the "Popular" badge.

Economy: 2 parts, from GPD and VEMO. A representative part number is GPD 13788.

The Standard Replacement section: 7 options from NISSENS, KOYORAD, TYC and 2 other brands. KOYORAD A13782 is listed in this group.

Part numbers include KOYORAD A13782, GPD 13788 and VEMO V20600087, among others listed above.

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

5 Radiator Fan Assembly parts for the 2018 BMW 340I come from 3 brands — TECHPRO, FOUR SEASONS and SKP. The "Popular" part is SKP SK621303.

The Economy section: 3 options from TECHPRO and SKP. SKP SK621303 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS. A representative part number is FOUR SEASONS 75321.

Part numbers include SKP SK621303, TECHPRO BM3115131 and TECHPRO BM3115132, among others listed above.

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

7 Temperature Sender / Sensor parts are listed for the 2018 BMW 340I, from GPD, HOLSTEIN, STANDARD MOTOR PRODUCTS and 2 other brands. STANDARD MOTOR PRODUCTS TS658 carries the "Popular" badge.

Economy: 4 parts, from GPD and HOLSTEIN. A representative part number is GPD 1814534.

The Standard Replacement section: 3 options from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and WELLS. STANDARD MOTOR PRODUCTS TS658 is listed in this group.

Listed part numbers: STANDARD MOTOR PRODUCTS TS658, GPD 1814534 and GPD 1712517, plus the other parts above.

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

6 Thermostat parts for the 2018 BMW 340I come from 6 brands — ÜRO PARTS, SKP, VEMO and 3 other brands. The "Popular" part is ÜRO PARTS 11537642854.

The Economy section: 3 options from ÜRO PARTS, SKP and VEMO. ÜRO PARTS 11537642854 is listed in this group.

Standard Replacement: 3 parts, from MOTORAD, FOUR SEASONS and REIN. A representative part number is MOTORAD 1223207.

Listed part numbers: ÜRO PARTS 11537642854, SKP SK86355 and VEMO V20990008, plus the other parts above.

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

This group shows a single part: ÜRO PARTS 11118619408PRM.

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

7 Water Pump parts for the 2018 BMW 340I come from 6 brands — BOSCH, BECK/ARNLEY, GMB and 3 other brands. The "Popular" part is BOSCH 0392023509.

The Economy section: 1 option from BECK/ARNLEY. BECK/ARNLEY 1312550 is listed in this group.

Standard Replacement: 6 parts, from BOSCH, GMB, FOUR SEASONS and 2 other brands. A representative part number is BOSCH 0392023509.

Listed part numbers: BOSCH 0392023509, BECK/ARNLEY 1312550 and GMB 1153160, plus the other parts above.

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

One part is listed for the 2018 BMW 340I — MAHLE / CLEVITE K33796.