What precautions should be taken when disconnecting the battery and replacing the radiator and coolant reservoir on Volkswagen Jetta?

If the battery is disconnected, several systems must be re-learned before they will work properly. For the replacement of the radiator shutter assembly (if equipped), follow the appropriate procedures. Begin by raising the front of the vehicle and securely supporting it on jackstands, then disconnect the cable from the negative terminal of the battery. Remove the under-vehicle splash shield and drain the cooling system, followed by removing the engine cover and cooling fan shroud. Disconnect the hoses from the radiator, being prepared for some coolant to spill, and then remove the front bumper cover. Next, remove the air guide fasteners and the air guides from each side of the condenser, followed by the condenser to radiator bolts. Remove the radiator mount bolts and push the radiator towards the rear until the upper mounts can be removed from the sides, then lift the radiator up and out of the lower mounts. Installation is the reverse of removal, and after refilling and bleeding the system, run the engine and check carefully for leaks. For specific engine types, remove the clips securing the hose connectors, disconnect the coolant temperature sensor electrical connector, and lift the clips securing the hose connectors to the charge air system circuit cooler. Remove the radiator mounting bolts, slide the radiator towards the engine until the upper mounts are free, and lift it out. Prior to installation, replace any damaged components. For the expansion tank, drain the cooling system until empty, detach the upper coolant hoses, disconnect the coolant level sensor connector, and remove the mounting screws to lift the expansion tank and disconnect the lower hose. Ensure the reservoir is clean before installation, which is the reverse of removal.

Genuine Volkswagen Jetta Coolant Reservoir

Coolant Tank Reservoir

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

9 Coolant Reservoirs found

View related parts
Volkswagen Jetta Reservoir Part Number: 5QM-121-407-E
$32.51 MSRP: $54.18
You Save: $21.67 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2019-2024 Volkswagen Jetta | GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium, Sport | 4 Cyl 1.4 L GAS, 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 1J0-121-407-F
$55.55 MSRP: $77.15
You Save: $21.60 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank
- Replaces: 1C0-121-407-E, 1C0-121-407-F, 1C0-121-403-C, 1J0-121-403-B, 1C0-121-403, 1C0-121-407-C, 1C0-121-403-A, 1J0-121-403, 1J0-121-407-E
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1999-2005 Volkswagen Jetta | GL, GL TDI, GLI, GLS, GLS TDI, GLX, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 1K0-121-407-F
$58.43 MSRP: $81.16
You Save: $22.73 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2005-2018 Volkswagen Jetta | 2.0T, 2.5, Base, GL TDI, GLI, GLI SE, GLI SEL, GLS TDI, Hybrid, Hybrid SE, Hybrid SEL, Hybrid SEL Premium, S, SE, SE Sport, SEL, SEL Premium, Sport, TDI, TDI Cup Edition, TDI Premium, TDI S, TDI SE, TDI SEL, Value Edition, Wolfsburg Edition | 4 Cyl 1.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 1.4 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 5Q0-121-407-M
$59.51 MSRP: $82.65
You Save: $23.14 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank
- Replaced by: 5Q0-121-407-AA
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2019-2024 Volkswagen Jetta | GLI 35th Anniversary Edition, GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium, Sport | 4 Cyl 1.4 L GAS, 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 1H0-121-407-A
$112.44 MSRP: $157.48
You Save: $45.04 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank; Reservoir Tank
- Replaces: 5X0-121-407-A
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1990-1999 Volkswagen Jetta | Carat, Celebration Edition, City, GL, GLI 16-Valve, GLS, GT, Jazz, K2, Limited Edition, TDI, Trek, Wolfsburg Edition | 4 Cyl 1.6 L DIESEL, 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 5QM-121-407-C
$31.07 MSRP: $51.78
You Save: $20.71 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank; Expansion Tank, Reservoir
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 2019-2020 Volkswagen Jetta | GLI 35th Anniversary Edition, GLI Autobahn, GLI S, R-Line, S, SE, SEL, SEL Premium | 4 Cyl 1.4 L GAS, 4 Cyl 2.0 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 171-121-407-F
$99.95 MSRP: $139.98
You Save: $40.03 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank; Reservoir
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1985-1989 Volkswagen Jetta | Base, Carat, GL, GLI, GLI 16-Valve, Wolfsburg Edition | 4 Cyl 1.8 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 021-121-407
$49.42 MSRP: $68.63
You Save: $19.21 (28%)
ADD TO CART
Product Specifications
- Other Name: Tank; Reservoir Tank
- Replaces: 021-121-407-B
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1994-1999 Volkswagen Jetta | GLX | 6 Cyl 2.8 L GAS
View related parts
Volkswagen Jetta Reservoir Part Number: 171-121-407-E
$16.69 MSRP: $22.80
You Save: $6.11 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank; Expansion Tank
- Warranty: This genuine part is guaranteed by Volkswagen's factory warranty.
Fits the following Vehicles:
- 1989, 1985-1987 Volkswagen Jetta | Base, GL, Wolfsburg Edition | 4 Cyl 1.6 L DIESEL

Volkswagen Jetta Coolant Reservoir

The Volkswagen Jetta Coolant Reservoir serves as a backup buffer that helps contain expanding coolant, prevent air from entering the cooling loop, and discharge fluid when temperatures reach a lower level to prevent damage to the engine and the environment. Within each contemporary Volkswagen engine compartment, a small hose connects the plastic tank to the radiator, and therefore any hot liquid will spill harmlessly instead of pouring onto the road, exposing ethylene glycol to soil pollution. The older models of Volkswagen normally applied a non-pressurized dummy type of overflow, with the spring-loaded pressure cap located in the radiator and the auxiliary tank topped by a simple plastic lid. As pressure increased, excess coolant was forced away, after which a cooling vacuum sucked the excess back in, preventing the presence of corrosive air bubbles in metal parts. Subsequent generations of Volkswagen applied a pressurized expansion. In this case, the heavier reinforced container is in the top position in the circuit and has its own harmless metal cap with pressure rating, permitting air instead of fluid to vent at hot moments and allowing atmospheric pressure to replenish the space when temperatures are low. Although the two versions have level markings that must be read when the motor is cold, the expansion design eradicates aeration since gravity maintains the liquid column intact. No matter the year, a healthy Coolant Reservoir ensures that a Jetta will be able to sustain the normal operating temperature, reduce rust, and limit dangerous waste. The Coolant Reservoir should be checked regularly to make sure that this frequently neglected part of the car is doing its crucial task.

Choose OEM Coolant Reservoir for superior quality and long-lasting durability. They match the Volkswagen's factory specifications exactly and pass strict quality control. If you plan to replace Coolant Reservoir on your Jetta, put OEM at the top of your list. You'll get the right fit, reliable performance, and peace of mind. We stock an extensive inventory of genuine Volkswagen Jetta parts. It is easy to find what you need. You will love our competitive prices that help you save. No more hassle with returns or guesswork. Every part includes a warranty straight from the manufacturer. Get trusted quality, strong durability, and real value today.

Volkswagen Jetta Coolant Reservoir Parts and Q&A

Reservoir
1K0-121-407-F
Q: What precautions should be taken when disconnecting the battery and replacing the radiator and coolant reservoir on Volkswagen Jetta?
A:
If the battery is disconnected, several systems must be re-learned before they will work properly. For the replacement of the radiator shutter assembly (if equipped), follow the appropriate procedures. Begin by raising the front of the vehicle and securely supporting it on jackstands, then disconnect the cable from the negative terminal of the battery. Remove the under-vehicle splash shield and drain the cooling system, followed by removing the engine cover and cooling fan shroud. Disconnect the hoses from the radiator, being prepared for some coolant to spill, and then remove the front bumper cover. Next, remove the air guide fasteners and the air guides from each side of the condenser, followed by the condenser to radiator bolts. Remove the radiator mount bolts and push the radiator towards the rear until the upper mounts can be removed from the sides, then lift the radiator up and out of the lower mounts. Installation is the reverse of removal, and after refilling and bleeding the system, run the engine and check carefully for leaks. For specific engine types, remove the clips securing the hose connectors, disconnect the coolant temperature sensor electrical connector, and lift the clips securing the hose connectors to the charge air system circuit cooler. Remove the radiator mounting bolts, slide the radiator towards the engine until the upper mounts are free, and lift it out. Prior to installation, replace any damaged components. For the expansion tank, drain the cooling system until empty, detach the upper coolant hoses, disconnect the coolant level sensor connector, and remove the mounting screws to lift the expansion tank and disconnect the lower hose. Ensure the reservoir is clean before installation, which is the reverse of removal.