26 Cooling system parts are listed for the 1985 Fiat X-1/9, in 4 part types, covering both the 1.5L L4 and the 2.0L L4. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 1985 Fiat X-1/9 keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (16 parts), Temperature Sender / Sensor (8 parts) and Thermostat (1 part). The other 1 part type covers the remaining 1 part.
The 1985 Fiat X-1/9 was sold with both the 1.5L L4 and the 2.0L L4. 21 parts fit every engine; the other 5 are engine-specific. Each part shows which engine(s) it fits.
11 brands supply cooling system parts for the 1985 Fiat X-1/9, led by PEAK (7 parts), PRESTONE (5 parts) and BECK/ARNLEY (3 parts), plus 8 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1985 Fiat X-1/9. 6 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and STANDARD MOTOR PRODUCTS TX18T (Temperature Sender / Sensor). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 1985 X-1/9 engines | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 1985 X-1/9 engines | MV5050GAL | 🇺🇸 US 🇨🇦 CA | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: all 1985 X-1/9 engines | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | BQA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: all 1985 X-1/9 engines | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 1985 X-1/9 engines | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 1985 X-1/9 engines | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | PKP1GAL | 🇺🇸 US 🇨🇦 CA | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | PXA1GAL | 🇺🇸 US 🇨🇦 CA | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE Fits: all 1985 X-1/9 engines | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 1985 X-1/9 engines | GREEN5050GAL | 🇺🇸 US 🇨🇦 CA | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | BMA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | RUA1GAL | 🇺🇸 US 🇨🇦 CA | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | FFA1GAL | 🇺🇸 US 🇨🇦 CA | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1985 X-1/9 engines | SEP1GAL | 🇺🇸 US 🇨🇦 CA | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: all 1985 X-1/9 engines | AF3300 | 🇺🇸 US 🇨🇦 CA | Prime Conventional Green 1 Gallon | View on Amazon |
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.
16 Coolant / Antifreeze parts are listed for the 1985 Fiat X-1/9, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1985 X-1/9.
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 Heavy Duty section lists 1 option from VALVOLINE — rated for severe service. VALVOLINE ZXG051 is listed in this group.
The Premium section lists 4 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 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 1985 X-1/9 engines | TX18T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| ÜRO PARTS Popular Fits: 1.5L L4 | 13621284397 | 🇺🇸 US 🇨🇦 CA | 2-Blade ConnectorTerminal Type: Pressure Contact | View on Amazon |
| SKP Fits: all 1985 X-1/9 engines | SKTX18 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: all 1985 X-1/9 engines | CTS13 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 1.5L L4 | 1580134 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| FOUR SEASONS Fits: all 1985 X-1/9 engines | 36413 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| JAPANESE OE Fits: 1.5L L4 | HS101 | 🇺🇸 US 🇨🇦 CA | TamaSwitch | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 1985 X-1/9 engines | TX18 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
8 Temperature Sender / Sensor parts are listed for the 1985 Fiat X-1/9, from STANDARD MOTOR PRODUCTS, ÜRO PARTS, SKP and 4 other brands. STANDARD MOTOR PRODUCTS TX18T carries the "Popular" badge. 5 parts fit every engine; the other 3 are engine-specific.
Economy: 4 parts, from STANDARD MOTOR PRODUCTS, ÜRO PARTS, SKP and 1 other brand. A representative part number is STANDARD MOTOR PRODUCTS TX18T.
The Standard Replacement section: 4 options from BECK/ARNLEY, FOUR SEASONS, JAPANESE OE and 1 other brand. BECK/ARNLEY 1580134 is listed in this group.
This group includes STANDARD MOTOR PRODUCTS TX18T, ÜRO PARTS 13621284397 and SKP SKTX18 and the remaining parts above.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 1.5L L4 | 1430708 | 🇺🇸 US 🇨🇦 CA | OE TemperatureGasket/Seal Not Included | View on Amazon |
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.
This group shows a single part: BECK/ARNLEY 1430708.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 1.5L L4 | 1312347 | 🇺🇸 US 🇨🇦 CA | Except A/CMetal Impeller | View on Amazon |
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.
This group shows a single part: BECK/ARNLEY 1312347.
Buying Cooling System Parts for a 1985 Fiat X-1/9
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 1985 Fiat X-1/9?
Our catalog currently lists 26 cooling system parts for the 1985 Fiat X-1/9 across 4 subcategories and 11 brands, covering both the 1.5L L4 and the 2.0L L4. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1985 Fiat X-1/9 engines?
Some do. 21 parts fit every engine; the other 5 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 1985 Fiat X-1/9?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1985 Fiat X-1/9 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1985 Fiat X-1/9?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1985 Fiat X-1/9
Cooling System Parts for Other Fiat X-1/9 Years
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