940 / 960

1990-1998 / Sedan / Estate / Sweden

All 940 / 960 problems All workshop issues

Critical Fuel System

Fuel pump failures and electrical gremlins

Symptoms

No fuel pressure, hard starting, or the engine cuts out at speed. Sometimes you'll hear the pump whining loudly before it fails.

Cause

In-tank fuel pumps wear out, especially if run on fumes regularly. Wiring to the pump (which runs through the trunk and under the car) corrodes or breaks.

Fix

Replace the fuel pump, Bosch units are reliable.

Check the fuel pump relay (under the passenger seat or behind the kick panel) and clean the contacts.

Inspect wiring from the tank forward for corrosion or breaks.

Fit a new fuel filter at the same time.

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// More 940 / 960 problems

Other known issues

Critical Engine

Oil leaks everywhere

You'll find oil pooling under the car, dripping from the valve cover, front and rear main seals, cam seals, or oil cooler lines. The B230 engines (940) and B6304 (960) both weep oil as they age, it's not if, it's when.

Common Engine

Flame trap and PCV system clogged

Engine bogs down, idles rough, struggles to rev, or won't start when hot. You might get excessive crankcase pressure, blowing out seals and pushing oil into the intake.

Critical Engine

Rough idle, hesitation, or won't start (fuel system issues)

Stumbling acceleration, poor fuel economy, hard starting, or stalling. Sometimes it runs fine cold but misfires when warm. Check engine light may be on or flashing.

Critical Engine

Timing belt and waterpump failures

Catastrophic engine damage if the belt snaps. You'll hear grinding, the engine stops instantly, and you're looking at bent valves or worse. Waterpump failure shows as overheating or coolant leaks from the front of the engine.

Critical Engine

B6304 (960) head gasket and overheating

White smoke from the exhaust, coolant disappearing with no visible leaks, overheating, or rough running. Sometimes you'll see oil in the coolant expansion tank.

Common Cooling System

Radiator, hoses, and expansion tank cracking

Coolant leaks, overheating, or sudden loss of coolant. The plastic expansion tank often cracks at the seams or where hoses attach. Radiator end tanks can split.

View all 24 940 / 960 problems