TT AUTO'S Engineering
Engineering Tools
Practical tools for comparing cars, planning ownership costs, decoding faults, and choosing the right model year.
43
vehicles and powertrains
101
fault codes
24
model-year guides
01
Vehicle Comparison
Compare reliability scores, known risks, strengths, and inspection priorities side by side.
43 vehicles and powertrains
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02
Ownership Cost Calculator
Build a realistic annual maintenance and repair reserve from vehicle, age, mileage, and history.
4 Currency | 3 Repair-cost region
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03
Fault-Code Library
Understand common OBD fault codes, likely systems, first checks, and when to stop driving.
101 fault codes
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04
Model-Year Guides
See how one production year changes the reliability picture for a specific model.
24 model-year guides
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