Radiator & Components for 2003 Audi A4
No.
Part # / Description / Price
Price
1
Radiator 
Audi
Audi Description: Auto trans. A6/S6. 3.0l. Autotrans. A4 Cabriolet. 3.2l. A6/S6. 2.7l. This factory Audi Radiator (8E0-121-251-AR) moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a partial loss of cooling capacity shows up as performance and economy loss before it shows as overheating. Buying genuine keeps the vehicle's original fit, finish, and warranty coverage intact. Check the applications list or supply your VIN to confirm this part fits your vehicle.
1
Radiator Audi
Audi Description: A4. 3.2L, manual trans. Listed under Audi part number 8E0-121-251-C, this Radiator moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a partial loss of cooling capacity shows up as performance and economy loss before it shows as overheating. Ordering genuine avoids the fit and durability compromises that come with aftermarket substitutes. Confirm fitment against your vehicle identification number before ordering.
2
Radiator Mount Bolt Audi
Audi Positions: Left
Description: 2.0L. 1.8L. 3.0L v6. 5.2L, main. 3.2L, supply. 4.2L, main, A4/S4. 4.2L, main, RS4. The original equipment Audi Radiator Mount Bolt supplied under part number 4B3-121-200 is a small but load bearing element of the assembly, and using the factory specificat ...
MSRP $5.40
$3.67
MSRP $5.40
$3.67
3
Radiator Upper Insulator Audi
Audi Positions: Left
Description: 2.0L. 1.8L. 3.0L v6. 4.2L v8. 3.2L, supply. 4.2L A4/S4 main. 4.2L, main, RS4. This factory Audi Radiator Upper Insulator (4B3-121-276-A) moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a par ...
MSRP $12.81
$8.72
MSRP $12.81
$8.72
4
Radiator Lower Insulator Audi
Audi Positions: Left
Description: 2.0L. 1.8L. 3.0L v6. 3.2L, supply. 4.2L A4/S4 main. 4.2L, main, RS4. This genuine Audi Radiator Lower Insulator, part number 4B3-121-275, moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a pa ...
MSRP $12.81
$8.72
MSRP $12.81
$8.72
8
Radiator Air Seal Audi
Audi Description: 1.8L. 3.0L v6. 3.2L, supply. 4.2L, main, A4/S4. 4.2L, main, RS4. The original equipment Audi Radiator Air Seal supplied under part number 8E0-121-331 creates the sealing interface between two components, and because a seal is the cheapest part in most ass ...
MSRP $24.50
$16.72
MSRP $24.50
$16.72
9
Engine Coolant Reservoir Audi
Audi Description: 3.0L. 3.2L. Audi part number 8E0-121-403-A, the factory Engine Coolant Reservoir, moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a partial loss of cooling capacity shows up as performance and economy loss before it shows as overheating. As a genuine Audi part it carries factory part numbering, original fitment data, and Audi parts warranty coverage. Check the applications list or supply your VIN to confirm this part fits your vehicle.
MSRP $81.65
$65.60
MSRP $81.65
$65.60
10
Cap Audi
Audi Description: This genuine Audi Cap, part number 8E0-121-321, encloses and protects the component behind it, keeping debris, moisture, and heat away from hardware that was not designed to be exposed while also finishing the visible surface. Genuine Audi tooling and materials mean it installs into the original mounting points without modification. Confirm fitment against your vehicle identification number before ordering.
MSRP $55.78
$37.34
MSRP $55.78
$37.34
11
Engine Coolant Reservoir Cap Seal Audi
Audi Notes: PARTS: Part included with reservoir cap.
Description: Listed under Audi part number 1H0-121-687-A, this Engine Coolant Reservoir Cap Seal creates the sealing interface between two components, and because a seal is the cheapest part in most assemblies but the most common source of leaks, using the correct specification is what keeps the repair permanent. Every genuine Audi part is validated against the same specification as the original equipment component. Use the fitment guide or contact our parts team to confirm the correct application.
MSRP $6.77
$4.60
MSRP $6.77
$4.60
16
Radiator Coolant Hose Audi
Audi Description: 3.0L v6.
Flexible hose that is part of the engine cooling system.
Flexible hose that is part of the engine cooling system.
16
Radiator Coolant Hose Audi
Audi Positions: Lower
Description: To5400000. Cabriolet A4. Audi part number 8E0-121-055-E, the factory Radiator Coolant Hose, moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a partial loss of cooling capacity shows up as performance and economy loss before it shows as overheating. Genuine Audi tooling and materials mean it installs into the original mounting points without modification. Check the applications list or supply your VIN to confirm this part fits your vehicle.
MSRP $216.65
$165.74
MSRP $216.65
$165.74
17
Engine Coolant Thermostat Kit Audi
Audi Description: 3.0L v6. A6/S6. With 3.0l. Cabriolet A4.
A kit containing a engine coolant thermostat and additional parts for installation.
A kit containing a engine coolant thermostat and additional parts for installation.
18
Engine Coolant Thermostat Gasket Audi
Audi Description: O-Ring. 56 x 3mm. 3.0L v6. 2009 without awd, main. A3. 2.0l. 2009-2010 with awd, tts. Listed under Audi part number 06B-121-119-C, this Engine Coolant Thermostat Gasket creates the sealing interface between two components, and because a seal is the cheape ...
MSRP $6.82
$4.64
MSRP $6.82
$4.64
19
Radiator Hose Clamp Audi
Audi Description: Audi part number N-906-872-01, the factory Radiator Hose Clamp, is a small but load bearing element of the assembly, and using the factory specification matters because thread pitch, coating, and clamp load are engineered for the joint rather than generic. Ordering genuine avoids the fit and durability compromises that come with aftermarket substitutes. Fitment varies by model year, trim, and option content, so verify before ordering.
MSRP $6.27
$4.27
MSRP $6.27
$4.27
19
Engine Coolant Reservoir Overflow Hose Clamp Audi
Audi Description: This factory Audi Engine Coolant Reservoir Overflow Hose Clamp (N-906-870-01) is a small but load bearing element of the assembly, and using the factory specification matters because thread pitch, coating, and clamp load are engineered for the joint rather than generic. Buying genuine keeps the vehicle's original fit, finish, and warranty coverage intact. Use the fitment guide or contact our parts team to confirm the correct application.
MSRP $8.87
$6.02
MSRP $8.87
$6.02
22
Plug Audi
Audi Description: 3.0L. 1.8L. 3.2L, feed. 3.2L, main. Audi part number 357-121-140, the factory Plug, is a small but load bearing element of the assembly, and using the factory specification matters because thread pitch, coating, and clamp load are engineered for the joint rather than generic. As a genuine Audi part it carries factory part numbering, original fitment data, and Audi parts warranty coverage. Confirm fitment against your vehicle identification number before ordering.
MSRP $13.14
$8.94
MSRP $13.14
$8.94
23
Engine Coolant Temperature Sensor Audi
Audi Description: This factory Audi Engine Coolant Temperature Sensor (059-919-501-A) moves heat out of the engine and charge air circuits, and because modern Audi engines run tight thermal windows, a partial loss of cooling capacity shows up as performance and economy loss before it shows as overheating. Ordering genuine avoids the fit and durability compromises that come with aftermarket substitutes. Confirm fitment against your vehicle identification number before ordering.
MSRP $57.77
$38.68
MSRP $57.77
$38.68
24
Engine Coolant Temperature Sensor O-Ring Audi
Audi Description: Genuine Audi Engine Coolant Temperature Sensor O-Ring N-903-168-02. This original equipment component creates the sealing interface between two components, and because a seal is the cheapest part in most assemblies but the most common source of leaks, using the correct specification is what keeps the repair permanent. Ordering genuine avoids the fit and durability compromises that come with aftermarket substitutes. Fitment varies by model year, trim, and option content, so verify before ordering.
MSRP $4.39
$2.99
MSRP $4.39
$2.99
25
Engine Coolant Temperature Sensor C-Clip Audi
Audi Description: This factory Audi Engine Coolant Temperature Sensor C-Clip (032-121-142) is a small but load bearing element of the assembly, and using the factory specification matters because thread pitch, coating, and clamp load are engineered for the joint rather than generic. It is supplied through the Audi dealer parts network and matches the component installed at the factory. Check the applications list or supply your VIN to confirm this part fits your vehicle.
MSRP $2.73
$1.86
MSRP $2.73
$1.86