1998-1999 Nissan Altima Ignition Switch: Decoding Manual vs. Automatic and Immobilizer Secrets
This guide covers the critical differences between ignition switches for automatic and manual transmissions, including anti-theft programming and shear bolt removal.
- The ignition switch for Automatic Transmission (AT) models is a large assembly (part D8700-9E100) that requires professional key programming to start the car.
- The switch for Manual Transmission (MT) models (part D8700-9E000) is a simpler part and does not require programming.
- AT models use one-time-use security shear bolts that are difficult to remove and require special techniques like cutting a slot with a Dremel.
- Failure symptoms include the car not starting, stalling, flickering dash lights, and a key that is hard to turn.
Symptoms of a Failing Ignition Switch
A bad ignition switch can cause a wide range of confusing electrical problems. Because it controls power to so many different systems, its failure can mimic other issues. Watch for these common signs:
- Car Won't Start: This is the most obvious symptom. You may turn the key and get nothing—no clicking from the starter and no cranking.
- Starts and Immediately Stalls: The switch might make initial contact to start the engine but fail to maintain power to the ignition or fuel systems, causing the engine to die. This can also be a symptom of the anti-theft system not recognizing the key.
- Intermittent Stalling While Driving: A worn switch can momentarily lose contact due to vibration or bumps in the road, cutting power to the engine and causing it to stall unexpectedly. This is a serious safety concern.
- Flickering Dashboard Lights and Accessories: If your dash lights, radio, or climate controls flicker or die intermittently, it could be a sign of poor electrical contacts inside the ignition switch.
- Key is Difficult to Turn or Gets Stuck: While this can sometimes be an issue with the mechanical lock cylinder itself, it can also indicate a problem within the ignition switch assembly. You may feel binding or a lack of distinct clicks between positions.
Known Issues, Recalls, and TSBs
As of mid-2024, there are no active or major recalls from the National Highway Traffic Safety Administration (NHTSA) specifically for the ignition switch on the 1998-1999 Nissan Altima. Likewise, no widespread Technical Service Bulletins (TSBs) concerning this specific part are publicly documented. While TSBs do exist for this vehicle generation, none point to a common, recognized fault with the ignition switch assembly.
Important: A recall (ID PC642/PM828) was issued for other Nissan models from 2017-2018 where the ignition switch could move out of the 'RUN' position, causing the engine to stall. This recall does not apply to the 1998-1999 Altima, but it highlights the potential danger of a failing ignition switch.
Buying a Used 1998-1999 Altima Ignition Switch
Buying a used OEM ignition switch is an excellent way to save money, but there are critical details you must get right to avoid buying an expensive paperweight.
Manual vs. Automatic: A Critical Difference
The single most important factor is your vehicle's transmission type. The parts are not interchangeable.
- Manual Transmission (MT): The correct part is typically OEM number D8700-9E000. This is a smaller assembly that consists of the lock cylinder and the electrical switch portion.
- Automatic Transmission (AT): The correct part is OEM number D8700-9E100. This is a much larger assembly that includes the lock cylinder, electrical switch, the entire steering lock housing, and comes with a new set of keys. Aftermarket replacements like the Standard Motor Products US-683 and Duralast LS1371 are equivalents for this automatic version.
Always verify the part number and the transmission type of the donor vehicle before purchasing.
Anti-Theft (NVIS) and Key Programming for Automatic Models
This is the #1 trap for buyers. Automatic transmission models of this era are equipped with the Nissan Vehicle Immobilizer System (NVIS). The key contains a hidden transponder chip that the car's computer must recognize to allow the engine to start.
Warning: If you install a used ignition switch on an automatic transmission Altima, the car will not start until the keys that came with the used switch are professionally programmed to your vehicle's Engine Control Module (ECM). Simply swapping the parts is not enough.
This programming is not a DIY procedure. It requires specialized equipment (like a Nissan CONSULT scan tool or a professional locksmith's tool) to register the new key transponders to your car. A mobile locksmith can often perform this service at your location, or you may need to have the vehicle towed to a dealership or repair shop.
Manual transmission models generally do not have this complex immobilizer integration, making replacement much simpler.
What to Inspect on a Used Part
- Check Key Operation: Ensure the key (or keys) provided turn smoothly in the cylinder from LOCK to START without binding.
- Inspect Electrical Connectors: Look for any signs of corrosion, melted plastic, or bent pins on all electrical connectors.
- Confirm Completeness: For AT models, ensure you are getting the entire steering lock assembly with keys as pictured in listings for part D8700-9E100.
Replacement Overview & Cost
Replacement difficulty varies significantly between transmission types.
Manual Transmission Models
For MT models, the process is relatively straightforward. It typically involves removing the steering column covers, disconnecting the electrical connector, and pressing a retaining pin to release the lock cylinder from the column. This is generally a feasible DIY job for someone with basic mechanical skills.
Automatic Transmission Models: Dealing with Shear Bolts
The AT assembly is secured to the steering column with two security shear bolts. These bolts are designed for theft prevention; when they are tightened at the factory, the hex head snaps off, leaving a smooth, round head that cannot be easily removed with standard tools.
Pro Tip: To remove shear bolts, you have two main options. The most common method is to use a Dremel tool with a small cutting disc to carefully cut a slot into the head of the bolt, allowing you to use a flathead screwdriver to back it out. Alternatively, you can use a sharp center punch and a hammer to tap the edge of the bolt head counter-clockwise, slowly walking it out.
Because of the shear bolts and the required key reprogramming, replacing the switch on an AT model is more difficult and may be best left to a professional.
Cost Comparison
Prices can vary, but here is a general breakdown of what to expect. Note that programming costs for AT models are separate.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM (Nissan) | $230 - $300 | For the complete AT assembly (D8700-9E100). |
| New Aftermarket | $130 - $185 | For a quality replacement like SMP or Duralast (AT version). |
| Used OEM | $50 - $120 | Best value, but ensure it's the correct MT/AT version and budget for programming on AT models. |
| Shop Labor | $150 - $350 | Varies based on MT/AT and local rates. AT is higher due to shear bolts. |
| Key Programming (AT Only) | $75 - $150 | Typically charged by locksmiths or dealers. |
Frequently Asked Questions (FAQ)
Does the 1998-1999 Altima ignition switch need to be programmed?
Yes, but only for models with an automatic transmission. The transponder keys that come with the replacement switch must be programmed to the car's computer by a dealer or locksmith for the engine to start. Manual transmission models do not require this step.
Can I use an ignition switch from an automatic Altima in my manual one?
No, the parts are physically different and not interchangeable. The automatic version is a large steering lock assembly, while the manual version is a smaller lock cylinder and switch.
My key won't turn. Is the ignition switch bad?
It could be, but first try wiggling the steering wheel back and forth while gently trying to turn the key. The steering lock can bind if the wheels are turned, preventing the key from moving. If that doesn't work, the issue could be a worn key or a failed mechanical lock cylinder, which are common problems.
What are shear bolts and why are they used?
Shear bolts are security fasteners used to attach the ignition lock assembly to the steering column. Their heads are designed to break off when tightened, leaving a smooth surface that makes it difficult for thieves to remove the ignition. They are a one-time-use item and must be replaced when installing the new switch.
Part Numbers
| Part Description | Part Number(s) |
|---|---|
| OEM Automatic Assembly | D8700-9E100, D87009E100 |
| OEM Manual Assembly | D8700-9E000, D87009E000 |
| Aftermarket Automatic Assembly | US-683 (Standard Motor Products), LS1371 (Duralast) |
| Aftermarket Manual Assembly | US-684 (Standard Motor Products) |
Technical Specifications
OEM Part Numbers: D8700-9E100 D87009E100 D8700-9E000 D87009E000
Varies by transmission. Automatic version includes steering lock housing, immobilizer-compatible keys, and is secured by two M8 shear bolts. Manual version is a smaller assembly with lock cylinder and keys.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Nissan Altima:
- Symptoms of a Failing Ignition Switch
- Known Issues, Recalls, and TSBs
- Buying a Used 1998-1999 Altima Ignition Switch
- Manual vs. Automatic: A Critical Difference
- Anti-Theft (NVIS) and Key Programming for Automatic Models
- What to Inspect on a Used Part
- Replacement Overview & Cost
- Manual Transmission Models
- Automatic Transmission Models: Dealing with Shear Bolts
- Cost Comparison
- Frequently Asked Questions (FAQ)
- Part Numbers
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