IsItAGoodCar
Reliability Guide

Common Problems with the
2004 Volvo S40 (P1)

The second-generation S40 (P1 platform, Ghent-built) launched in 2004 with a 1.6/1.8/2.0/2.4i and 2.5T engine range and its V50 sibling; DRIVe and D2/D3/D4 diesels joined in the 2008-2010 refresh before production ended in May 2012.

What changed for 2004

  • •2004: new S40 arrives with the 2004.5-spec safety package (IC, WHIPS, SIPS)
  • •2008-2009: DRIVe low-CO2 versions and interior updates
  • •2010: complete new engine family (D2/D3/D4, 1.6/2.0/T5) for the 2011 model year

Common MOT watch-outs

  • !Door lock actuator failures
  • !Powershift dual-clutch wear on automatic cars
  • !EGR and DPF clogging on city-run diesels
2
Known Issues
0
Serious
1
Moderate
1
Minor

All Known Issues

EGR and DPF clogging on diesels

ModerateExhaust & Emissions

Urban-driven diesel S40s soot up their EGR and DPF systems, bringing hesitation, smoke and frequent warning lights.

Est. Repair Cost: £250–£900
Warning Signs:

Flat performance, Engine light, Frequent regeneration or smoke

What to Inspect:
  • Warm drive at motorway speed
  • Ask about DPF replacement or forced regeneration
  • Avoid obvious short-trip cars
Verified by IsItAGoodCar Research TeamUpdated

Door lock actuator failure

MinorBodywork & Rust

Central-locking actuators wear out and leave one door ignoring the remote or needing repeated unlock attempts.

Est. Repair Cost: £150–£300 per door
Warning Signs:

One door stays locked, Double press needed to unlock, Remote works inconsistently

What to Inspect:
  • Test every door separately
  • Check both keys
  • Listen for weak latch movement
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2004 Volvo S40 (P1)

  • End-of-line 2010+ cars have the better engines.
  • Check for the tailgate/hatch alignment on V50 estates at viewing.
2005–2007
Check a 2004 Volvo S40 (P1) by Registration