The 2004 Volvo S40 has two recalls, the more serious involving the fuel pump control module, which can allow water in and corrode internally, causing the engine to stall and leaving the driver without power in traffic.
The second recall involves the brake vacuum system: a non-return valve in the brake booster vacuum line can crack and leak, reducing the power assist to the brake pedal. When this happens, stopping the car requires noticeably more pedal force than usual, and the engine may idle roughly.
At a glance
What can fail
The fuel pump electronic module may not be sealed well enough to keep water out. Water can cause corrosion that makes the module fail, leading to fuel pressure problems and engine stalling.
What the fix does
Dealers will replace the fuel pump electronic module and move it to a better location.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The non-return valve in the vacuum system may crack due to a poor weld, causing a vacuum leak.
What the fix does
Dealers will inspect the vacuum hose and replace it if needed.
Summarized — see the official notice for exact wording, dates, and contacts.
