Common Issues We Fix - Londonderry, NH

Common Issues

Our Expertise

Common Lexus & Toyota Issues We Fix

Even the most reliable vehicles encounter issues over time. Our team at Jeff’s Lex-Toy LLC in Londonderry, NH, specializes in diagnosing and repairing common problems found in Toyota and Lexus models:

1. Toyota and Lexus Oil leaks/ Front Timing Cover oil Leaks - Oil Consumption Issues

Some Toyota engines, particularly older models like the 2007-2011 Camry and RAV4, are known for excessive oil consumption. Our specialists can inspect for oil leaks, recommend high-mileage oil solutions, and perform necessary engine repairs to mitigate excessive oil burn.

A front timing cover leak in a Lexus 3.5L engine (like the 2GR-FE V6 found in models such as the Camry, Avalon, Rav4, RX350, ES350, and others) is a relatively common issue. The leak typically occurs due to aging gaskets or sealant around the timing cover. Here’s an overview of the issue and what you can do about it:

Common Causes:

Worn Gaskets/Sealant:
The timing cover is sealed to the engine block using a high-temperature RTV (silicone) sealant. Over time, heat and pressure can cause the sealant to degrade, leading to oil leaks.
Heat Cycling and Vibration:
The engine undergoes repeated heating and cooling cycles, which can cause the cover to warp slightly or the sealant to lose its adhesion.
Age and Mileage/ Factory did not put enough sealer in certain locations on the assembly line:
High-mileage vehicles are more prone to this issue as gaskets and sealants naturally wear out.
Engine needs to be removed from the vehicle and remove oil pans, valve covers and front timing cover, Clean and reseal all Locations that require Factory RTV sealer. These require lots of labor and can be a very expensive repair.

2. Lexus RX & ES Suspension Problems Need to remove RX and ES as these do not have air/hydraulic controlled suspension and switch these to (GX470,GX460, LX, LS and Land Cruiser, Sequoia, 4Runner

Many Lexus RX and ES models experience air suspension failures over time. If your vehicle’s ride height is uneven or the suspension feels bouncy, our team can diagnose and repair or replace faulty struts, air compressors, or sensors to restore smooth handling.

3. Hybrid Battery Replacements

Toyota’s Prius, Highlander Hybrid, and Lexus hybrid models are known for their long-lasting but eventually aging hybrid batteries. If you experience decreased fuel efficiency, warning lights, or reduced performance, we offer affordable hybrid battery replacements and conditioning services to extend the life of your vehicle.

In hybrid models (e.g., RX 450h, ES 300h), the hybrid battery may degrade over time, leading to reduced fuel efficiency or performance.

Yes, we sell high-quality, pre-owned Lexus and Toyota vehicles that have been thoroughly inspected and maintained. If you’re looking for a reliable used car, visit our lot to see what we have available, or check out Used Cars listings.

4. Toyota & Lexus Transmission Issues and Torque converter shudder issues

Some Toyota and Lexus models develop transmission shifting problems, especially in high-mileage RAV4, Corolla, and Lexus ES, GS, GX models. Our team is skilled in diagnosing and performing transmission fluid services, repairs, and rebuilds to prevent long-term damage.

5. Toyota Prius Headgaskets

Toyota Prius head gasket failures are a known issue, particularly in models equipped with the 1.8L 4-cylinder engine (engine code 2ZR-FXE), commonly found in third-generation Priuses (2010–2015). Here's a breakdown of the problem, its causes, and potential solutions:

Common Symptoms of Head Gasket Failure

Rough Cold Start: A noticeable shaking or misfire when starting the engine cold.
Coolant Loss: Unexplained drop in coolant levels without visible leaks.
White Smoke from Exhaust: Indicates coolant entering the combustion chamber.
Overheating: Engine temperatures rise above normal, especially during long drives.
Check Engine Light (CEL): Codes such as P0301–P0304 (cylinder misfire) may be triggered.
If not repaired quickly Internal engine damage can happen from Hydro locking a cylinder causing Connecting rod damage or failure. We have had to replace many bent connecting rods and pistons which adds to the cost of repairs.

Root Causes

Excessive Heat: Long-term exposure to high operating temperatures can weaken the gasket material.
EGR (Exhaust Gas Recirculation) Clogging: In third-gen Priuses, the EGR cooler and valve can clog with carbon, leading to uneven cylinder temperatures and head gasket stress.
High Mileage: Wear and tear over 150,000–200,000 miles can contribute to failure.
Poor Maintenance: Infrequent coolant changes or low coolant levels can exacerbate the problem.

Affected Models

2010–2015 Toyota Prius
2012–2015 Toyota Prius v
Some Toyota Corolla and Toyota Auris models with the same engine design.

Prevention

Regular Maintenance:
Clean the EGR system and intake manifold periodically.
Replace the coolant according to the manufacturer’s recommendations.
Monitor Coolant Levels: Check for leaks or loss regularly.

7. Faulty EVAP System

Models Affected: Corolla, Camry, and Rav4. Lexus ES300, ES330, ES350, GS350, RX350
Symptoms: Check Engine light with codes related to the evaporative emissions system.
Solution: Replacing the EVAP canister or vacuum lines.
Cracked and leaking fuel pump module assembly, fuel tanks rusting and leaking.

8. Water Pump Leaks, Noises or Failure

Models Affected: Toyota Highlander, Camry, and Rav4. Lexus ES350, RX350, GS350
Symptoms: Coolant leaks, overheating, or unusual noise from the engine bay.
Solution: Replace the water pump and inspect the cooling system.

9. Electrical Problems

Models Affected: All Toyota and Lexus
Symptoms: Dashboard warning lights, battery issues, or headlight malfunctions.
Solution: Replacing faulty wiring or hybrid batteries.

10. Mice chewing on Toyota and Lexus wiring has been a surprisingly common issue in recent years

The problem largely stems from the use of soy-based insulation on the wiring, which some manufacturers have adopted as a more environmentally friendly alternative to traditional petroleum-based insulation. Unfortunately, the soy-based material seems to attract rodents, who chew through it, causing costly damage.

Here’s a breakdown of the issue and what you can do:

Why Mice Chew Wiring

Soy-Based Insulation: Rodents are attracted to the soy content in the wiring, mistaking it for food.
Warm Engine Bays: Cars provide shelter and warmth, especially in cold climates.
Nest Building: Mice chew on wires not just for food, but also to create nesting materials.

Vehicles Affected

Many Toyota and Lexus models with soy-based wiring are at risk. This includes models from the 2010s onward, but specific reports vary by region and vehicle.

Preventative Measures

Rodent Repellent Tape: Toyota and Lexus offer electrical tape treated with capsaicin (pepper extract) to deter rodents. You can purchase this from dealerships or online.
Rodent Repellent Sprays: Apply sprays in the engine bay to discourage rodents.
Ultrasonic Repellent Devices: These emit high-frequency sounds that are unpleasant for rodents.
Regular Inspection: Check under the hood frequently for signs of rodent activity, like droppings or chewed wires.
Cleanliness: Avoid leaving food or trash in or around the vehicle, which could attract rodents.

What to Do if Your Wiring Is Damaged

Contact Jeff's Lex-Toy LLC: Toyota or Lexus dealership Alternative. We have experience handling these repairs.
Insurance Claims: Rodent damage is often covered under comprehensive car insurance policies.
Consider Lawsuits or Recalls: Some owners have joined class-action lawsuits claiming that soy-based wiring constitutes a defect. Check if there are any ongoing cases in your region.

Long-Term Solutions

If rodent activity is common in your area, consider parking your car in a garage and sealing potential entry points.
Using traps or bait stations around your parking area may help reduce the rodent population.

Have you had this issue yourself? If so, I can help brainstorm specific solutions!