Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1984 Horizon.
The 1984 Plymouth Horizon requires 4 quarts of engine oil with the filter installed, choosing from 20W-20, 15W-40, or 5W-30 viscosity grades depending on operating conditions. Reliability records for this model year show a narrow scope of documented issues: just two total owner complaints, with the gasoline fuel system standing out as the top complaint area, matched by two recalls. That limited footprint positions the 1984 model as a relatively quiet year in the Horizon’s reliability history, signaling that while the fuel system warrants specific attention, overall owner-reported problems remain minimal.
Fluid capacities, tune-up values and fuel economy at a glance.
Engine, drivetrain, dimensions and economy.
| Overall length | 165 in |
| Overall width | 65.7 in |
| Overall height | 53.1 in |
| Wheelbase | 98.8 in |
| Curb weight | 2176 lb |
| Weight distribution (front / rear) | 60/40 |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4 qt w/ filter of 20W-20 / 15W-40 / 5W-30 engine oil, DOT 3 brake fluid.
| Brake Fluid | DOT 3 |
| Engine Oil | 20W-20 · 15W-40 · 5W-30 · 5W-40 |
| Engine Oil Capacity | 4 qt w/ filter |
| Engine Oil | 20W-20 · 15W-40 · 5W-30 · 5W-40 |
| Engine Oil Capacity | 4 qt w/ filter |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 1984 Plymouth Horizon dominate in one area — the fuel system, gasoline, 1 of 2 reports (50%), well ahead of the next concern. That matters, because the fuel system, gasoline are also the target of recall 84V-147 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 0 of the reports describe a crash and 1 a fire — a small share of the total, but worth weighing against the fuel system, gasoline pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 2 complaints on record, top 2 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 2 campaigns on record for this vehicle.
FEDERAL MOGUL IS RECALLING 6,903 AFTERMARKET BALL JOINT ASSEMBLIES SHIPPED BETWEEN NOVEMBER 9, 2007 AND MARCH 26, 2008, WHICH MAY HAVE BEEN PACKAGED WITH INCORRECT NUTS. THE PART NUMBERS PACKAGED WITH INCORRECT NUTS… Remedy: FEDERAL MOGUL WILL NOTIFY OWNERS AND REPLACE THE PARTS FREE OF CHARGE. THE RECALL BEGAN ON MAY 22, 2008. OWNERS CAN CONTACT FEDERAL MOGUL AT 877-489-6659.
THE POTENTIAL FOR FUEL LEAKAGE EXISTS IN THE ENGINE COMPARTMENT AT THE FUEL RESERVOIR SEAM AND ITS HOSE CONNECTIONS. THE FUEL RESERVOIR IS A SILVER COLORED CAN MOUNTED TO THE AIR CLEANER. Remedy: THE HOSES AND THE METAL TUBE THAT ATTACHES TO THE FUEL RESERVOIR WILL BE REPLACED WITH NEW COMPONENTS. THE DEALER WILL ALSO REPLACE OR RESEAL THE RESERVOIR.
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
4 qt w/ filter of ABOVE 20 degrees F: 30, 20 degrees F TO 80 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, BELOW 100 degrees F 5W-30 OR 5W-40, BELOW 60 degrees F: 5W-30, 5W-40, per the factory manual.
NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.