Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
$100.00
Used OEM engine control module (ECM) for 1998 Ford Focus with 3.4L engine and automatic transmission. This electronic brain box controls engine functions and has been inspected for proper operation. Stock number PCM9170.
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This used OEM engine control module (ECM) was removed from a 1998 Ford Focus donor vehicle equipped with a 3.4L PZEV engine and automatic transmission. The ECM is located at the base of the right-hand A-pillar and carries ID numbers AS4A-CA and AS4A-12B684-CA. This electronic brain box has been inspected by our technicians and is currently on the shelf ready for immediate shipment.
The engine control module is the central computer that manages your Ford Focus engine’s fuel injection, ignition timing, emissions controls, and transmission shifting. ECMs commonly fail due to electrical surges, water damage, or internal component degradation over time, causing symptoms like rough idle, poor fuel economy, transmission shifting issues, or the vehicle failing to start. A functioning ECM is essential for proper engine operation and emissions compliance.
603 Auto Salvage maintains over 50,000 used auto parts in stock from more than 1,100 vehicles, ensuring we have the Ford Focus parts you need. Our experienced team can help verify compatibility and answer technical questions about this ECM. Browse our online inventory or contact us directly to check availability and discuss your specific vehicle requirements. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
| Part | Engine Control Module (ECM) – Electronic Brain Box |
| Interchange # | |
| OEM Part Number | AS4A-CA / AS4A-12B684-CA |
| Side | N/A |
| Part Grade | X — Used OEM part – Inspected and ready to ship, located at base of RH A-pillar |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
| Year / Make / Model | 1998 FORD FOCNRS |
| VIN | N/A |
| Vehicle Stock # | PCM9170 |
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (ECM) – Electronic Brain Box:
| ✅ Connector Pins | All pins straight and corrosion-free |
| ✅ Housing Integrity | No cracks or damage to ECM case |
| ✅ Mounting Tabs | Secure and undamaged |
| ✅ Internal Components | No signs of water damage or burning |
Based on interchange #, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 1998 | Ford | Focus | 3.4L PZEV engine with automatic transmission – Contact us for full compatibility verification |
Questions? Need a shipping quote? Call us now:
603 Auto Salvage | 233 Main St, Plaistow, NH 03865
Mon–Fri 8am–4:30pm | Sat 8am–2pm | Sun Closed
This ECM is specifically for 1998 Ford Focus models with 3.4L PZEV engines and automatic transmissions. Contact us with your VIN to verify exact compatibility before ordering.
Yes, most ECMs require programming to match your vehicle’s VIN and specific configuration. This should be done by a qualified technician with the proper diagnostic equipment.
Common symptoms include engine misfiring, poor fuel economy, transmission shifting problems, check engine lights, or the vehicle not starting at all.
This is a used OEM engine control module removed from a donor vehicle. It has been inspected for proper condition and is ready for installation.
Yes, this part comes with our 90-day warranty covering defects and functionality issues. Contact us immediately if you experience any problems after installation.
Looking for this part by number? Here are the reference numbers:
| Ford Part Number | AS4A-CA |
| Extended Part Number | AS4A-12B684-CA |
| Stock Number | PCM9170 |
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $400-600 | 1 year | Brand new, longest wait time |
| Aftermarket | $250-400 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $150-250 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $100 | 90-Day Warranty | Tested, Grade X, ships in 24hrs |
🔍 Free Fitment Check
Call us with your VIN and we will verify compatibility for free. No obligation, no pressure — just answers.
Our parts specialists check interchange data in real-time
This part ships via FedEx Ground. Prices are estimates — call for an exact quote to your zip code.
| Region | Estimated Cost | Transit Time |
|---|---|---|
| New England (NH, MA, ME, VT, CT, RI) | $15 – $30 | 1–3 business days |
| Northeast (NY, NJ, PA, MD, VA) | $20 – $40 | 2–4 business days |
| Southeast (FL, GA, NC, SC, TN) | $25 – $45 | 3–5 business days |
| Midwest (OH, MI, IL, IN, WI, MN) | $30 – $50 | 3–5 business days |
| Southwest (TX, AZ, NM, OK) | $35 – $55 | 4–6 business days |
| West Coast (CA, OR, WA) | $40 – $65 | 5–7 business days |
Local pickup is always free. Free delivery within 30 miles of Plaistow, NH.
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.
| Weight | 3 lbs |
|---|
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I had a great experience with 603 Auto Salvage Inc. The team was very helpful and quickly found the exact part I needed. They kept me informed and made the pickup process easy. The price was very fair, and the service was excellent. I would definitely recommend them and will use them again if I need parts in the future.
Excellent support, she helped me with my order service was fast and exactly what I needed.Very Professional.
The customer service at 603 was great. They found the part I needed very quickly and promptly notified me when it was ready to be picked up. There wasn’t any other place in the area that had what I needed. The price was very good also. I will be using them again for sure.
I had a great experience. They didn’t just look up the part I needed they took the time to explain how to install it and made sure I understood everything. I even received a call back, which I really appreciated. Everyone I spoke with was friendly and patient, and I never felt brushed off. I truly felt taken care of. Highly recommend if you want knowledgeable people who actually care about helping you. Kristy Thanks Guys!
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Super Friendly, Easy to work with, Accurate inventory, and great prices
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