1998 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated May 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998 Volvo 940 has 3 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $30 to $1,500. DIY maintenance guides at au7o.io.
On the 1991-1998 Volvo 940, the AW30-43 automatic transmission develops overdrive lockout, harsh shifts, and eventually complete failure. The solenoid and valve body are common failure points.
Begin by confirming fluid condition and level, then scan/inspect the overdrive electrical circuit, shifter switch, relay, wiring, and the AW30-43 overdrive solenoid for proper power and resistance. If overdrive is inoperative or the 2-3 shift is harsh, remove the transmission pan and inspect for debris, then service or replace the solenoid and clean/rebuild the valve body, as sticking valves and worn bores are common causes; fresh Dexron-spec ATF and a new filter/screen should be installed at the same time. If slipping, delayed engagement, or heavy clutch material is present in the pan, the unit usually needs a full rebuild or replacement transmission rather than solenoid-only repair. Typical costs are about $150-$400 for diagnosis/fluid service, $300-$800 for solenoid/valve body repair, and $1,800-$3,000 for a complete rebuild.
Parts and tips from 0+ owners who fixed this issue
On the 1991-1998 Volvo 940, the PCV flame trap (crankcase ventilation system) clogs with oil sludge, pressurizing the crankcase and causing oil leaks from every gasket and seal. This is the number one maintenance item on all redblock Volvos.
Inspect the crankcase ventilation system by removing the flame trap, breather hoses, and oil separator/breather box under the intake manifold; if the flame trap is restricted or the hoses are soft and sludged, the system is overdue for service. Clean or replace the flame trap, all PCV hoses, and ideally the breather box and intake manifold gasket, then verify crankcase vacuum at the oil filler cap or dipstick tube at idle to confirm proper flow. If the engine has been leaking for a while, also inspect and replace pushed-out cam, front crank, or intermediate shaft seals as needed after restoring ventilation. Parts typically run about $50-$150 for a basic flame trap/hoses service or $150-$300 with breather box and gaskets, while shop repair is commonly $300-$700 depending on access and how many seals are already leaking.
Parts and tips from 0+ owners who fixed this issue
On the 1991-1998 Volvo 940, the Volvo 940 blower motor resistor pack fails, causing the heater fan to only work on the highest speed setting. The resistor pack overheats and the solder connections crack.
Parts and tips from 0+ owners who fixed this issue
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1998-1998 Volvo 940 has 3 documented issues. The most frequently reported are: AW30-43 Transmission Overdrive and Shift Issues, PCV System Flame Trap Clogging, Heater Blower Fan Resistor Pack Failure. None are rated critical, but regular maintenance is recommended.
The 1998-1998 Volvo 940 has 3 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Volvo 940 issues range from $30 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The AW30-43 automatic transmission develops overdrive lockout, harsh shifts, and eventually complete failure. The solenoid and valve body are common failure points. Repairs typically run $300-$1,500. Severity: medium.
The PCV flame trap (crankcase ventilation system) clogs with oil sludge, pressurizing the crankcase and causing oil leaks from every gasket and seal. This is the number one maintenance item on all redblock Volvos. Repairs typically run $30-$150. Severity: medium.
The Volvo 940 blower motor resistor pack fails, causing the heater fan to only work on the highest speed setting. The resistor pack overheats and the solder connections crack. Repairs typically run $40-$200. Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
