An independent opinion early in the game can save you time and money. An unfavorable report that convinces your lawyer not to pursue a lawsuit against the manufacturer can be as valuable as a strong report that supports a good claim. After all, the consumer doesn't have to prove the exact nature of the complaint. However, hiring an expert immediately can establish the consumer's credibility and challenge the manufacturer's anticipated defenses. Particularly where the defect's symptoms are sporadic, a qualified technician verifying the problem greatly strengthens the case.
Some attorneys refuse to take a case until an expert has inspected the vehicle.
It may not be easy. Ideally, you want someone who can engage a jury. What you might have to settle for is someone who knows a differential from a dipstick and who can write a good report. In metropolitan areas, automotive experts often advertise. A law library or public library may have catalogs that list forensic consultants.