Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1984 Fiero.
The 1984 Pontiac Fiero, with its 3-quart oil capacity calling for 10W-30 or 5W-30 viscosity and a 3-speed automatic transmission, delivered EPA fuel economy of 21 city, 29 highway, and 24 combined mpg. A standout spec is its 29 mpg highway rating, but the model's reliability headline reveals 44 total owner complaints—led by Engine & Engine Cooling issues—and 4 recalls. This inaugural year sits outside the model's complaint history from 1991 to 1996, which recorded only a single complaint in 1991, meaning the 1984 Fiero experienced more reported problems than any subsequent year in that span.
Fluid capacities, tune-up values and fuel economy at a glance.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic 3-spd |
| Overall length | 160.2 in |
| Overall width | 68.9 in |
| Overall height | 46.9 in |
| Wheelbase | 93.3 in |
| Curb weight | 2449 lb |
| Weight distribution (front / rear) | 44/56 |
| EPA city / highway / combined | 21 / 29 / 24 mpg |
| Recommended fuel | Regular Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the Fiero of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 1984 | SE Coupe 2.5L I-4 | 10.50 sec | 17.70 sec | 92 hp | RWD |
| 1984 | SE Coupe 2.5L I-4 | 10.90 sec | 18.10 sec | 92 hp | RWD |
| 1984 | SE Coupe 2.5L I-4 | 11.20 sec | 17.60 sec | 92 hp | RWD |
| 1984 | SE Coupe 2.5L I-4 | 11.60 sec | 18.20 sec | 92 hp | RWD |
| 1988 | Formula Coupe 2.8L V6 | 7.50 sec | 15.70 sec | 135 hp | RWD |
| 1988 | Formula Coupe 2.8L V6 | 8.00 sec | 16.00 sec | 135 hp | RWD |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 3 qt of 10W-30 / 5W-30 engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.
| Brake Fluid | DOT 3 |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 3.5 qt |
| Engine Coolant | ETHYLENE GLYCOL |
| Engine Oil | 10W-30 · 5W-30 |
| Engine Oil Capacity | 3 qt |
| Power Steering Fluid | USE GM PART NO. 1050017 OR EQUIVALENT |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The provided year-by-year federal record covers only 1991, 1994, and 1996, each registering one complaint, zero recalls, zero investigations, and one TSB, indicating a flat, minimal trend across those later years with no recalls or investigations. Because 1984 is omitted from that record, the target year cannot be placed directly within that year-by-year arc; however, the 1984 model itself shows 23 engine and engine cooling complaints, 11 electrical system complaints, and 9 fire complaints, alongside zero crash complaints, though the supplied data does not specify root causes. Relative to the negligible complaint volume and complete absence of recalls visible in the later years of the record, the 1984 model carries a concentrated complaint load in engine and fire-related categories that lacks corresponding federal recall or investigation context. Given that the 1984 model exhibits the highest specific complaint counts in the available data—including nine fire complaints—without any offsetting recall history in the provided record, it represents a risky prospect for buyers prioritizing documented reliability.
All 44 complaints on record, top 8 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 4 campaigns on record for this vehicle.
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURED FROM OCTOBER 18… Remedy: HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 18, 2006. OWNERS MAY CONTACT FRAM CUSTOMER SERVICE AT 1-800-890-2075 (OPTION…
PARKING BRAKE ADJUSTER FAILS TO OPERATE AND DO NOT WORK AFTER BRAKE PAD WEAR. Remedy: REPLACE NONFUNCTIONING PARKING BRAKE ADJUSTERS.
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.
3 qt of ABOVE 40 degrees F: 30, ABOVE 0 degrees F: 10W-30, BELOW 60 degrees F: 5W-30, per the factory manual.
NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 21 city / 29 highway / 24 combined mpg.