This page lists 28 cooling system parts for the 1986 Fiat X-1/9, across 4 part types, covering the 1.5L L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
The cooling system system on the 1986 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 Water Pump (3 parts). The other 1 part type covers the remaining 1 part.
Every part on this page is matched to the 1.5L L4 — the only engine offered in the 1986 Fiat X-1/9.
The most listed brands for 1986 Fiat X-1/9 cooling system parts are PEAK (7 parts), PRESTONE (5 parts) and FVP (3 parts), plus 9 more brands. Quality grades include Standard Replacement, Economy and Premium.
6 parts on this 1986 Fiat X-1/9 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FVP MV5050GAL (Coolant / Antifreeze) and STANDARD MOTOR PRODUCTS TX18T (Temperature Sender / Sensor). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇺🇸 US 🇨🇦 CA | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US 🇨🇦 CA | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US 🇨🇦 CA | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | GREEN5050GAL | 🇺🇸 US 🇨🇦 CA | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK | BMA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK | RUA1GAL | 🇺🇸 US 🇨🇦 CA | Conventional Green1 Gallon | View on Amazon |
| PEAK | FFA1GAL | 🇺🇸 US 🇨🇦 CA | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK | SEP1GAL | 🇺🇸 US 🇨🇦 CA | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE | 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 for the 1986 Fiat X-1/9 come from 4 brands — PEAK, PRESTONE, FVP and 1 other brand. The "Popular" part is FVP MV5050GAL.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.
In the Heavy Duty grade, VALVOLINE supplies 1 part: rated for severe service. A representative part number is VALVOLINE ZXG051.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, PEAK, FVP and PRESTONE supply 6 parts: built to original-equipment specification. A representative part number is FVP GREEN5050GAL.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | TX18T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| ÜRO PARTS Popular | 13621284397 | 🇺🇸 US 🇨🇦 CA | 2-Blade ConnectorTerminal Type: Pressure Contact | View on Amazon |
| SKP | SKTX18 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS | CTS13 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1580134 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| FOUR SEASONS | 36413 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| JAPANESE OE | HS101 | 🇺🇸 US 🇨🇦 CA | TamaSwitch | View on Amazon |
| STANDARD MOTOR PRODUCTS | 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 for the 1986 Fiat X-1/9 come from 7 brands — STANDARD MOTOR PRODUCTS, ÜRO PARTS, SKP and 4 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS TX18T.
The Economy section: 4 options from STANDARD MOTOR PRODUCTS, ÜRO PARTS, SKP and 1 other brand. STANDARD MOTOR PRODUCTS TX18T is listed in this group.
Standard Replacement: 4 parts, from BECK/ARNLEY, FOUR SEASONS, JAPANESE OE and 1 other brand. A representative part number is BECK/ARNLEY 1580134.
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 | 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.
One part is listed for the 1986 Fiat X-1/9 — BECK/ARNLEY 1430708.
Water Pump
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1312347 | 🇺🇸 US 🇨🇦 CA | Except A/CMetal Impeller | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 1232020 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GMB | 1232020 | 🇺🇸 US 🇨🇦 CA | 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.
3 Water Pump parts are listed for the 1986 Fiat X-1/9, from BECK/ARNLEY, FVP and GMB.
Economy: 1 part, from BECK/ARNLEY. A representative part number is BECK/ARNLEY 1312347.
The Standard Replacement section: 2 options from FVP and GMB. FVP 1232020 is listed in this group.
This group includes BECK/ARNLEY 1312347 and FVP 1232020 and the remaining parts above.
Buying Cooling System Parts for a 1986 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.
- Confirm you have the 1.5L L4 engine — every part on this page is matched to it.
- 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 1986 Fiat X-1/9?
Our catalog currently lists 28 cooling system parts for the 1986 Fiat X-1/9 across 4 subcategories and 12 brands, covering the 1.5L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1986 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 1986 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 1986 Fiat X-1/9?
Every part on this page is matched to the 1.5L L4 engine. 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 1986 Fiat X-1/9
Cooling System Parts for Other Fiat X-1/9 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.