2000-2002 Jaguar S-Type Ignition Switch: Solving No-Start & Electrical Faults

Is Programming Required for a Replacement Ignition Switch?

No, replacing the electrical ignition switch on a 2000-2002 Jaguar S-Type does not require any programming or a visit to the dealer. The vehicle's anti-theft system, known as the Passive Anti-Theft System (PATS), uses a transponder chip inside the key. This chip communicates with a transceiver module located around the mechanical lock cylinder. The ignition switch is simply an electrical component that receives the command to power on after the key has been successfully verified. Because you are only replacing the switch and reusing your original key and lock cylinder, the security system is not affected.

Symptoms of a Failing Ignition Switch

A bad ignition switch can cause confusing, intermittent electrical problems. The internal contacts wear out over time, leading to a poor connection. Here are the most common signs:

• Engine Stalls While Driving: The most serious symptom is a sudden loss of engine power while on the road. This happens when the switch's connection to the engine computer or fuel pump is momentarily lost.
• No-Crank, No-Start Condition: You turn the key to the 'Start' position, but nothing happens. The dashboard lights may or may not come on, but the starter motor does not engage.
• Intermittent Starting: The car may start perfectly one day and fail to start the next, or you may need to jiggle the key to get it to work.
• Electrical Accessories Don't Work Correctly: The radio, climate control, or power windows may not turn on when the key is in the 'Accessory' or 'On' position.
• Dashboard Lights Flicker: You may notice the instrument cluster lights flickering or going out entirely while driving.
• Key Is Removable While Car is Running: In some cases of failure, the switch may not properly lock the key in place, allowing it to be removed while the engine is still on.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

As of this writing, there are no specific recalls or TSBs from Jaguar or the NHTSA for ignition switch failure on the 2000-2002 S-Type. However, this part is a known failure point due to age and wear.

A critical piece of information for owners is that the 2000-2002 Jaguar S-Type was built on the Ford DEW98 platform, which it shares with the 2000-2002 Lincoln LS. Many components, including the ignition switch, are identical between the two vehicles. This significantly widens the availability of compatible used parts.

Buying a Used Ignition Switch for Your S-Type

A used OEM ignition switch is an excellent, cost-effective solution. Because this part is purely electrical and requires no programming, a reliable unit from a low-mileage donor vehicle can provide the same performance as a new part for a fraction of the price. Here's what to look for:

• Verify the Part Number: Check the numbers on your original switch and match them to the replacement. Look for either the Jaguar part number (like XR815757 or XR81954) or the Ford part number (like XW4T-11572-AC). Remember that a part from a 2000-2002 Lincoln LS will also work.
• Check the VIN for 2002 Models: If you have a 2002 S-Type, confirm your VIN is M45254 or earlier.
• Inspect the Connector: Look at photos of the electrical connector pins. Ensure they are straight, clean, and free of any green or white corrosion.
• Confirm It's the Switch Only: Listings should specify that you are buying the electrical switch, not the lock cylinder housing or key. You will reuse your existing lock and keys.
• Choose OEM Over Aftermarket: A used switch with the 'FoMoCo' (Ford Motor Company) logo is a genuine OEM part. These are often built to a higher quality standard than the cheapest new aftermarket alternatives, which may use inferior plastics and internal contacts that can fail prematurely.

Replacement Overview

Replacing the ignition switch is a feasible DIY job for those comfortable working under the dashboard. The difficulty is rated as a 2 out of 5.

1. Disconnect the Battery: Always disconnect the negative battery terminal before starting any electrical work.
2. Remove Steering Column Shrouds: Remove the plastic covers around the steering column. This usually involves a few screws on the underside.
3. Remove Lower Dash Panel: You may need to remove the panel beneath the steering wheel for better access. One forum user noted a tricky plastic fastener that needs to be pried out.
4. Unplug the Switch: The electrical connector has a release tab that must be squeezed to unplug it. Access can be tight.
5. Unbolt the Old Switch: The switch is typically held to the back of the lock cylinder housing with two small screws. A 7/32" or 5.5mm socket may be required.
6. Install the New Switch: Bolt the new switch into place, reconnect the electrical plug, and reassemble the dash and column covers.
7. Test Operation: Reconnect the battery and test all key positions (ACC, ON, START) to ensure everything functions correctly before finishing reassembly.

Cost to Replace a 2000-2002 Jaguar S-Type Ignition Switch

Frequently Asked Questions (FAQ)