* ECM vs. ABS Module: The ABS (Anti-lock Braking System) light is *not* directly related to the ECM. The ECM controls the engine and transmission. The ABS light indicates a problem within the ABS system itself, likely a faulty ABS module, wheel speed sensor, or related wiring. The dealer *might* be mistaken or trying to sell you an unnecessary repair. A misdiagnosis is possible.
* Diagnosis First: A reputable mechanic should diagnose the problem *before* replacing any expensive parts. A proper diagnostic scan using a suitable code reader should pinpoint the specific fault within the ABS system. This is crucial.
* Cost of Repair: $1000 for an ABS module replacement might be on the higher side, depending on the specific part and labor rates in your area. You can check online auto parts stores for potential module prices to get a comparison. Independent mechanics often charge less than dealerships.
* Car's Worth: A 1998 Oldsmobile Achieva with 103,000 miles is a relatively old car. Its value is heavily dependent on condition (rust, maintenance history, etc.). Kelly Blue Book or Edmunds could give you a fair market value estimate, but remember these are just estimates. The $1000 repair significantly impacts its value.
Recommendation:
1. Get a second opinion: Take your Achieva to a different, independent mechanic for a diagnosis. Be sure to tell them the dealer's assessment and ask about their approach to diagnosing the ABS light.
2. Get specific quotes: Obtain quotes for the repair (including parts and labor) from multiple sources. This will give you leverage for negotiation.
3. Assess the overall cost: If the repair cost, plus the current value of the car, exceeds what you're willing to spend, it may be time to consider selling the vehicle as-is or replacing it.
In short: The dealer's assessment is suspect because they're suggesting an ECM replacement for an ABS light issue. Proceed cautiously and get multiple diagnoses before spending $1000 on a repair for a car of that age and mileage.
